KR20160074074A - Method and device for determineing appropriateness of traffic signal cycle - Google Patents

Abstract

Disclosed are a method and a device for determining appropriateness of a traffic signal cycle to calculate a traffic volume in accordance with a traffic signal cycle and associated with the speed of a vehicle and to determine whether or not the traffic signal cycle of an intersection is appropriately set through a comparison between the calculated heterogeneous traffic volumes. According to the present invention, the method comprises the following steps: calculating a signal cycle traffic volume in accordance with a traffic signal cycle of an intersection on a measurement point inside a road connected to the intersection; calculating a point traffic volume by using the speed of a vehicle passing the measurement point; and determining whether or not the traffic signal cycle of the intersection is appropriate by comparing the signal cycle traffic volume and the point traffic volume.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and an apparatus for determining the suitability of a traffic signal cycle,

The present invention calculates a traffic amount according to a traffic signal period and a traffic amount related to the speed of a vehicle and compares the calculated traffic amounts with each other to determine whether or not an intersection signal period is appropriately set. ≪ / RTI >

Traffic lights installed at intersections are generally operated by automatically changing the color of a signal according to a preset time interval.

Such a signal change system of the traffic lights by setting the time intervals can not flexibly cope with the actual situation of traffic when the number of vehicles entering the intersection changes abruptly, which may cause traffic congestion.

In order to solve this problem, there has been proposed a traffic light control method for changing the signal length of a traffic light in consideration of traffic situation.

Conventionally, as an example of a traffic light control method, a 'police control signal control method' can be exemplified.

'Police signal control method' determines the intersection signal period to be fixedly controlled using the Webster method. In the Webster method, a period in which the delay is minimized is calculated by using a value obtained by dividing the total start-up loss time per cycle by the traffic volume ratio of the main flow (passing vehicle demand / saturation traffic volume) for a certain period of time according to the number of events .

That is, the 'police signal control method' can determine the duration and the change point of each signal (red, no, rust, etc.) in the traffic light by calculating the cycle value at which the traffic lag is minimized.

In addition, the 'police signal control method' is based on Webster's fixed control, and it can operate real-time control using loop detector, CCTV, etc.

As another example of the conventional traffic light control method, an apparatus and method for determining a green time of a traffic signal using fuzzy theory can be exemplified.

In fuzzy theory, fuzzy theory is used to determine traffic signal in green time determining device and method. That is, an apparatus and method for determining a green time of a traffic signal using fuzzy logic can determine a green time of a traffic signal by using a fuzzy logic.

Also, the apparatus and method for determining the green time of a traffic signal using the fuzzy theory can infer the result using the fuzzy rule when the vehicle speed detected for the vehicle and the weight of the vehicle passing through the vehicle are detected through the vehicle detector, The green time can be calculated by reverse fuzzing.

In the apparatus and method for determining the green time of a traffic signal using the fuzzy theory, the green time can be determined by summing up the passenger car conversion coefficient, the estimated crossing pass speed, the start delay time, and the like.

These conventional traffic light control methods analyze the current status (in particular, the vehicle speed) of a plurality of vehicles that have entered an intersection for a certain period of time, determine signal periods of the next period according to the analysis results, It is limited.

As a result, the conventional traffic light control method also has a limit that it is difficult to flexibly cope with a case where the number of vehicles entering an intersection increases sharply in a short time or sharply decreases.

Accordingly, it is possible to calculate the traffic volume at the intersection in different ways, compare the calculated different traffic volumes, determine the adequacy of the intersection signal cycle for the traffic lights at the intersection, and adjust the intersection signal cycle to the current traffic situation There is an urgent need for the emergence of a new model that allows immediate adjustment.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for estimating the adequacy of an intersection signal cycle by comparing a signal period traffic volume calculated using a traffic signal cycle and a point traffic volume calculated using a vehicle speed .

Another object of the present invention is to determine the adequacy of an intersection signal cycle by mutual comparison with different kinds of traffic volumes and immediately adjust the intersection signal cycle according to a current traffic situation according to a result of the discrimination have.

According to another aspect of the present invention, there is provided a method of determining the suitability of a traffic signal period, the method comprising: calculating a signal period traffic volume according to an intersection signal period at a measurement point in a road connected to an intersection; , Calculating a point traffic volume, and comparing the signal traffic volume with the point traffic volume to determine whether the intersection signal period is appropriate.

According to another aspect of the present invention, there is provided an apparatus for determining the suitability of a traffic signal cycle, comprising: a first traffic volume calculator for calculating a signal cycle traffic volume according to an intersection signal cycle at an in-road measurement point connected to an intersection; And a control processor for determining whether the intersection signal cycle is appropriate by comparing the signal cycle traffic volume with the point traffic volume.

According to the present invention, it is possible to accurately determine the adequacy of the intersection signal period by comparing the signal period traffic amount calculated using the traffic signal period and the point traffic amount calculated using the vehicle speed, Methods, and apparatus.

Further, according to the present invention, it is possible to determine appropriateness of an intersection signal cycle by mutual comparison with different types of traffic volumes, and to immediately adjust the intersection signal cycle according to a current traffic situation according to the discrimination result.

FIG. 1 is a diagram illustrating a concrete configuration of an apparatus for determining the suitability of a traffic signal period according to an embodiment of the present invention. Referring to FIG.
2 is a diagram for explaining a temporal movement state of the vehicle.
3 is a view for explaining a spatial movement situation of the vehicle.
Fig. 4 is a diagram for explaining an example of calculating the right turn traffic amount [gamma] at an intersection with a right turn private road.
Fig. 5 is a diagram for explaining an example of calculating a right turn traffic amount? By a signal period in an intersection without a right turn private road.
6 is a view for explaining the movement of the vehicle according to the speed and the speed for each road.
7 is a view for explaining an example of discriminating the suitability of an intersection signal period.
FIG. 8 is a flowchart illustrating a method of determining the suitability of a traffic signal period according to an exemplary embodiment of the present invention. Referring to FIG.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

The 'intersection signal period' (traffic signal period), which is continuously used in this specification, may refer to a time interval of a traffic light for assigning a traffic priority to a specific direction to a vehicle which is going to cross each other at an intersection. Such an intersection signal period can be allocated by repeating a predetermined interval of time for each of three color equalizations of a wave (including progressive arrow, rotation arrow), yellow (attention), and red (stop)

The method and apparatus for determining the adequacy of the traffic signal period described in this specification can determine the adequacy of the intersection signal period so that the intersection signal period can be set appropriately according to the traffic situation at the intersection.

FIG. 1 is a diagram illustrating a concrete configuration of an apparatus for determining the suitability of a traffic signal period according to an embodiment of the present invention. Referring to FIG.

The traffic signal period suitability discrimination apparatus 100 of the present invention may include a first traffic volume calculator 110, a second traffic volume calculator 120, and a control processor 130. The traffic signal cycle suitability discrimination apparatus 100 may be embodied in a traffic signal control apparatus for integrally controlling a plurality of traffic lights installed at an intersection, which is a discrimination target.

First, the first traffic volume calculator 110 calculates the signal period traffic volume A according to the intersection signal period at the in-road measurement point connected to the intersection. That is, the first traffic volume calculator 110 may measure the amount of the traffic flow at the measuring point by the current intersection signal period.

The first traffic volume calculator 110 may include a determination unit 111 and a first calculation unit 112. Also, according to the embodiment, the first traffic volume calculator 110 may further include a first calculation unit 113 and a count unit 114.

The determining unit 111 determines the amount of straight traffic passing through the intersection and the amount of left turn traffic beta that rotates the intersection to the left. That is, the determination unit 111 can determine the amount of the vehicle that reaches the measurement point via the intersection based on the straight-ahead signal period and the left-turn signal period in the intersection signal period.

In the determination of the straight traffic volume α, the first traffic volume calculator 110 may further utilize the first calculation unit 113 and the count unit 114.

The first calculation unit 113 calculates the passage distance required for reaching the measurement point across the intersection, at the stop position, for each vehicle train.

For example, for a vehicle having a lane width of 3 m and a length of 1 meter on both sides of the road, the first calculation unit 113 calculates the passage distance of one row by 25 m (= (3 m * 8) + 1m), and the passing distance of the two rows is calculated as 31m (= (the passing distance of one row is 25m + (the heading distance of 6m * 1)) and the passing distance of the three columns is calculated as 37m 6m * 2)).

That is, the first calculation unit 113 can calculate the passage distance on the basis of the formula '25 + 6 (r-1) '(r is the vehicle train) at the intersection of the example.

Also, the first calculation unit 113 calculates the movable distance that the vehicle travels while the straight-ahead signal period is maintained for each vehicle train. For example, assuming that an intersection with a straight-ahead signal period of 73 seconds and a limited speed of 60 km is accelerated from a stop to a speed of 10 km per hour, the first calculation unit 113 calculates a movable distance of one row at (10000 m / 3600 + 3600 ... + 50000m / 3600 + (60000m / 3600) * (73-5). Assuming that the two-row vehicle starts two seconds later than the one-row vehicle at the movable distance of two rows, the first calculating unit 113 calculates the two movable ranges of the row (10000m / 3600 + 20000m / 3600 ... + 3600 + (60000 m / 3600) * (71-5). Similarly, assuming that the three-row vehicle starts at four seconds later than the one-row vehicle at the movable distance of three rows, the first calculating unit 113 calculates the three-row movable distance (10000m / 3600 + 20000m / 3600 ... + 50000 m / 3600 + (60000 m / 3600) * (69-5).

That is, the first calculation unit 113 calculates the sum of the movable distance along the acceleration of 10 km per hour up to 5 seconds, and calculates (60000m / 3600) * (t-2 -1) -5) '(t is the holding time of the straight signal period, and r is the vehicle train).

'(t은 직진 신호주기의 유지시간)에 의거하여 연산할 수 있다.To summarize, the first calculation unit 113 calculates the movable distance in the example of the intersection by using the formula '

(t is the holding time of the straight-ahead signal cycle).

The counting unit 114 counts the number of vehicle trains in which the passing distance is shorter than the movable distance. That is, the counting unit 114 can count the vehicle train that can pass through the intersection because the movable distance is longer than the passing distance.

In the above example, in the case of one column, the passing distance is calculated as '25 + 6 (1-1) 'm, and the movable distance is calculated as 10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + ) * M (73-2 (1-1) -5)) m and the passing distance '25m' is shorter than the movable distance '1175.16m', the counting unit 114 counts the one column can do.

In the case of the 31st row, the passing distance is calculated to be 25 + 6 (31-1) 'm, and the movable distance is calculated as (10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / , The passing distance '205m' is longer than the movable distance '174.96m', and the counting unit 114 does not count the 31st row.

That is, the counting unit 114 may count the number of vehicle trains in which the passing distance is shorter than the movable distance with respect to the intersection, as " 30 "

Thereafter, the determination unit 111 determines the straight traffic volume [alpha] by multiplying the straight ahead player by the counted number. In the example described above, the determination unit 111 can determine 90 cars as the straight traffic volume (?) By multiplying the number of straight cars (three lanes of one way lane) by the counted number '30'.

The first traffic volume calculator 110 can further utilize the first calculation unit 113 and the count unit 114 in determining the left turn traffic volume [beta].

The first calculation unit 113 calculates the passing distance required for reaching the measurement point by rotating the intersection to the left at the stop position for each vehicle train. For example, in the case of a vehicle in which an eight-lane intersection is to be rotated to the left, the first calculating section 113 calculates a straight line passing distance of 25 m, a passing distance of two lines of 31 m, The passing distance of three columns can be calculated by 37 m.

That is, the first calculation unit 113 can calculate the passage distance on the basis of the formula '25 + 6 (r-1) '(r is the vehicle train) at the intersection of the example.

Further, the first calculation unit 113 calculates the movable distance that the vehicle travels while the left-turn signal cycle is maintained for each vehicle train. For example, assuming that an intersection with a left-turn signal period of 28 seconds and a speed limit of 60 km is accelerated from a stop to a speed of 10 km per hour, the first calculation section 113 sets the movable distance of one row at (10000 m / 3600 + 3600 ... + 50000m / 3600 + (60000m / 3600) * (28-5). Assuming that the two-row vehicle starts two seconds later than the one-row vehicle at the movable distance of two rows, the first calculating unit 113 calculates the two movable ranges of the row (10000m / 3600 + 20000m / 3600 ... + 3600 + (60000 m / 3600) * (26-5). Similarly, assuming that the three-row vehicle starts at four seconds later than the one-row vehicle at the movable distance of three rows, the first calculating unit 113 calculates the three-row movable distance (10000m / 3600 + 20000m / 3600 ... + 50000 m / 3600 + (60000 m / 3600) * (24-5).

That is, the first calculation unit 113 calculates the sum of the movable distance along the acceleration of 10 km per hour up to 5 seconds, and calculates (60000m / 3600) * (t-2 -1) -5) '(t is the holding time of the left turn signal period, and r is the vehicle train).

'(t은 좌회전 신호주기의 유지시간)에 의거하여 연산할 수 있다.To summarize, the first calculation unit 113 calculates the movable distance in the example of the intersection by using the formula '

(t is the holding time of the left-turn signal period).

The counting unit 114 counts the number of vehicle trains in which the passing distance is shorter than the movable distance. That is, the counting unit 114 can count the vehicle train that can pass through the intersection because the movable distance is longer than the passing distance.

In the above example, in the case of one column, the passing distance is calculated as '25 + 6 (1-1) 'm, and the movable distance is calculated as 10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + ) * M (73-2 (1-1) -5)) m and the passing distance '25m' is shorter than the movable distance '1175.16m', the counting unit 114 counts the one column can do.

In the case of 12 rows, the passing distance is calculated as 25 + 6 (12-1) 'm, and the movable distance is calculated as (10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 28-2 (12-1) -5), and the passing distance '91 m' is longer than the movable distance '58.27 m', and the counting unit 114 does not count the 12 rows.

That is, the counting unit 114 can count the number of vehicle trains in which the passing distance is shorter than the movable distance with respect to the intersection, as " 11 "

Thereafter, the determination unit 111 determines the left-turn traffic amount [beta] by multiplying the left-turn preceding player by the counted number. In the above example, the determination unit 111 can determine eleven cars as the straight traffic volume [alpha] by multiplying the counted number " 11 " by the left turn lane player (one lane of one lane four lanes).

After the straight traffic volume α and the left turn traffic volume β are determined, the first calculation unit 112 calculates the signal cycle traffic volume A by adding the straight traffic volume α and the left turn traffic volume β . For example, the signal period traffic amount A at the measuring point related to the above-mentioned intersection can be calculated as 101 by summing the straight traffic amount alpha '90' and the left turn traffic amount '11'.

The right turn traffic amount? For the vehicle turning to the right of the intersection may be included in the calculation of the signal period traffic amount A according to the presence or absence of the right turn specific vehicle or the position of the measurement point.

First, when the measurement point is located in the vehicle flow direction of the right turn exclusive vehicle at the intersection, the determination unit 111 can determine the right turn traffic amount? Passing through the right turn private road. In other words, if there is a right-turn-only vehicle that makes it possible to always turn right by a dedicated right turn signal cycle irrespective of other signal periods of the intersection, and if the measurement point can be reached through the right turn- The traffic volume (gamma) can be further determined.

The first traffic volume calculator 110 may further utilize the counting unit 114 in the determination of the right turn traffic volume γ in relation to the right turn private vehicle.

The counting unit 114 counts the number of vehicle trains reaching the measurement point through the right turn-only vehicle while the right turn signal cycle is maintained. The right turn signal period for guiding the right turn vehicle to the right turn exclusive vehicle usually indicates that the right turn can always be performed except for the pedestrian signal traversing the right turn private vehicle path. The counting unit 114 is proportional to the time So that the number of vehicle trains reaching the measurement point can be counted.

The determining unit 111 can determine the right turn traffic amount? By applying a predetermined weight to a value obtained by multiplying the difference between the difference between the difference between the difference between the difference between the difference in the right turn right vehicle and the counted number. Here, the weight value may be a numerical value according to the actual ratio of the right turn exclusive vehicle, and may be set to, for example, 40% (0.4).

For example, when the number of lanes to a right-turn exclusive vehicle is one and the number of vehicle lines reaching the measurement point through the right-turn exclusive vehicle is 40, the determination unit 111 determines 16 Can be determined as the right turn traffic amount?.

After determining the right turn traffic amount [gamma], the first calculation unit 112 may calculate the signal period traffic amount A by further adding the right turn traffic amount [gamma]. The first calculation unit 112 calculates the right turn traffic amount (?) '16 units' for the 101 units (the straight traffic volume? 90 units + the left turn traffic volume? The signal period traffic volume (A) at the measuring point can be calculated as "117 units".

If there is no right-side turning-only vehicle at the intersection, the determining unit 111 can determine the right-turning traffic amount? That rotates right at the intersection in consideration of the right turnable time.

The first traffic volume calculator 110 may further utilize the first calculation unit 113 and the count unit 114 in the determination of the right turn traffic volume [gamma].

The first calculation unit 113 can calculate the right turnable time by subtracting the time when the pedestrian exists on the pedestrian crossing of the intersection from the sum of the time set in the vehicle progression in the intersection signal cycle. In other words, the first calculation unit 113 calculates the right turnable time (i.e., the right turnable time) from the signal cycle (part of the straight signal cycle, part of the red signal, etc.) Can be calculated.

The counting unit 114 counts the number of vehicle lines reaching the measurement point via the intersection for the calculated right-turnable time. The right turn signal cycle may not be separately set at the intersection so that the right turn vehicle can make a right turn while viewing the traffic situation of the intersection for the right turnable time calculated previously. The counting unit 114 can count the number of vehicle train reaching the measurement point in proportion to the time the right turnable time is maintained.

The determination unit 111 can determine the right turn traffic amount [gamma] by multiplying the number of counts by the right turn player.

For example, when the number of right turn lanes is 1 and the number of vehicle lines reaching the measurement point via the intersection during the right turnable time is 28, the determination unit 111 determines 28 cars of '1 * 28' γ).

After determining the right turn traffic amount [gamma], the first calculation unit 112 may calculate the signal period traffic amount A by further adding the right turn traffic amount [gamma]. The first calculation unit 112 calculates the right turn traffic amount (?) '28 units' for 101 units (straight traffic volume? 90 units + left turn traffic volume? The signal periodic traffic volume (A) at the measuring point can be calculated as "129 units".

2 to 5, an example of calculating the signal period traffic volume A by the first traffic volume calculator will be described.

The signal period traffic volume (A) on one road in the intersection can be seen as the sum of the vehicle flows to the road by the intersection signal period. That is, the signal period traffic volume A can calculate the traffic volume of the road by summing the straight traffic volume alpha, the left turn traffic volume beta and the right turn traffic volume gamma.

2 is a diagram for explaining a temporal movement state of the vehicle.

In calculating the signal period traffic volume A, the suitability determining apparatus 100 of the present invention first considers the temporal movement state of the vehicle.

The vehicle on the road is basically based on the length of the passenger car, and the length of the vehicle such as a bus or a vans can be considered in accordance with the road conditions.

The vehicle can be considered to have a speed change starting from a green signal at a speed of 0 km in the signal standby state.

The vehicle in the rear row may be considered to start after a certain time (for example, two seconds) after the vehicle in the front row starts.

As shown in Fig. 2, it can be assumed that the two-row vehicle waiting on the stop line departs two seconds after the first row vehicle departs. In the case of the three-row vehicle, it can be assumed that the vehicle of the first row departs four seconds after the vehicle departs, that is, two seconds after the vehicle of the second row departs. At this time, the length of the vehicle is 5 m, the distance between the vehicles (the inter-vehicle distance) is 1 m, and the distance between the vehicles can be 6 m.

Also, the suitability discriminating apparatus 100 can consider the spatial movement state of the vehicle.

3 is a view for explaining a spatial movement situation of the vehicle.

The movement of the vehicle in the intersection can be considered to be that the vehicle waiting by the signal period moves from the first stop line to the stop line (measurement point) to be moved. The distance between these stop lines, that is, the passing distance, can be calculated as the lane width of the road.

Fig. 3 (a) is a view illustrating the passing distance of the vehicle that straightens the intersection, and Fig. 3 (b) is a view illustrating the passing distance of the vehicle that rotates the intersection to the left.

As shown in Fig. 3 (a), in the intersection where the four directions are eight lanes, the adequacy discrimination apparatus 100 judges that the passage distance through which one row of vehicles passing straight through the intersection has to travel, Lane width) * 8 + 1m (length of both sides of the road)) '= 25m.

In the case of the vehicle in the rear row, the suitability discriminating apparatus 100 can calculate the passage distance to be moved by the sum of the length depending on the type of the vehicle and the distance between the vehicles. For example, the passing distance to two rows of vehicles can be calculated as 31 meters, plus the passing distance of 25 meters for one row of vehicles, plus the vehicle length of 5 meters and the inter-vehicle distance of 1 meter. In addition, the passing distance to the three-row vehicle can be calculated as 37m plus the passing distance of 31m with respect to the two-row vehicle, plus the heading distance of 6m.

In the case of the left turn, as shown in Fig. 3 (b), in the intersection where the four directions are eight lanes, the adequacy discrimination apparatus 100 determines, as the passing distance, (3m (lane width) * 4 + 0.5m (length of one side of the road)) + 12.5m '= 25m.

Further, the passing distance to the two-row vehicle can be calculated as 37 m (18.5 m + 12.5 m) by adding the headway distance of 6 m to the one-row vehicle passing distance of 25 m.

Subsequently, the adequacy discrimination apparatus 100 can calculate the straight traffic volume [alpha] and the left turn traffic volume [beta].

The speed of the vehicle can be changed from 0 to the performance according to the type of the vehicle. Here, it is assumed that the speed of the vehicle is increased by 10 km per second on the basis of a passenger car and does not exceed the speed limit of the road.

The suitability discriminating apparatus 100 compares the passing distance with the movable distance which can be moved within the signal period and counts the vehicle train whose passing distance is shorter than the movable distance.

The straight traffic amount alpha can be determined by the product of the straight forward slope Sl and the number Cr of vehicles included in the traffic volume.

)보다 짧을 때 포함될 수 있다.The number of vehicle trains (Cr) included in the traffic volume can be calculated by multiplying the vehicle passing distance by the vehicle's moving distance in the signal time (km / h)

). ≪ / RTI >

For example, when the speed is 10 km / h, the movable distance that can be moved for 1 second can be converted into 1 * (10000 m / 3600 seconds) = 2.78 m.

Since the basic assumption is that the vehicle will increase at a rate of 10 km per second up to the limit speed,

=

으로 계산될 수 있다.

=

. ≪ / RTI >

In the case of the rear row, since the basic home is set to start after 2 seconds,

=

으로 계산될 수 있다.

=

. ≪ / RTI >

The passing distance is the distance that the vehicle should travel, and it is said that the distance from the basic home is increased by the length of the vehicle and the distance between cars. Therefore, the pass distance of the first one row is 25m and the passing distance of the two rows of passenger cars is (25 + 5 + 1) m .

That is, the passing distance increases by 25 + 6 (r-1) m for every vehicle train.

If the movable distance of the vehicle in the signal time is larger than the passing distance at which each vehicle train should move, the vehicle in the corresponding vehicle train may be included in the traffic volume as it passes through the intersection in the signal cycle. Accordingly, the number Cr of the train of cars included in the traffic volume is expressed by

로 표현 할 수 있다.

.

Where Dr is the passing distance and t is the holding time of the straight-ahead signal period.

For example, when the passing time is 25 + 6 (r-1) m, the straight-ahead signal time is 73 seconds, and the intersection limit speed is 60 km, the suitability discriminating apparatus 100 judges, Can be compared as follows.

'25 + 6 (1-1)' m <'(10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 3600)

As a result of comparison, since the passing distance of 25 m is shorter than the movable distance of 1175.16 m, the suitability discriminating apparatus 100 can count one row included in the traffic volume.

Further, with respect to the 31 rows of vehicles, the adequacy discrimination device 100,

(2500 + 3600 + 60000 m / 3600) * (73-2 (31-1) -5) Do not include heat in traffic.

Therefore, the suitability discriminating apparatus 100 can count the number Cr of the vehicle train included in the traffic volume as 30, from the first column to the thirtieth column.

When the immediately preceding car S1 is 3, the suitability discriminating apparatus 100 can calculate 90 * 3 * 30 by calculating S1 * Cr with the straight traffic amount [alpha].

Also, the adequacy discrimination apparatus 100 can determine the left-turn traffic volume [beta] as the product of the left-turnable player Ll and the number of vehicle train (Cr) included in the traffic volume.

The number Cr of vehicle trains included in the traffic volume may be the same as the method of determining the straight traffic volume [alpha].

Then, the suitability discriminating apparatus 100 can selectively calculate the right turn traffic amount [gamma].

In the calculation of the right turn traffic amount [gamma], the suitability discrimination apparatus 100 can be calculated by dividing into two cases when there is a right-turn exclusive vehicle at the intersection and when there is no right-turn exclusive vehicle.

Fig. 4 is a diagram for explaining an example of calculating the right turn traffic amount [gamma] at an intersection with a right turn private road.

The rightness judging device 100 may or may not include the right turn traffic quantity γ in the signal cycle traffic quantity A depending on the position of the measurement point.

4, when the measurement point is located on the road between the intersection and the right turn-only vehicle, the correctness discrimination device 100 determines that the right turn traffic amount? That is not determined because the actual right turn vehicle does not proceed at the intersection due to the right turn- , And may not be included in the signal period traffic amount (A) ('α + β' interval in FIG. 4).

On the other hand, when the measurement point is located in the vehicle flow direction of the right-turn exclusive vehicle at the intersection, that is, when the measurement point is located on the road after being connected to the right-turn exclusive vehicle, the correctness- Can be included in the signal period traffic amount A (the section of [alpha] + [beta] + [gamma] 'in Fig. 4).

If there is a right-of-way train, the vehicle progress is not affected by the signal cycle and crosswalk. In this case, the right turn traffic volume (γ) can be calculated by taking into account that the right turn traffic road is installed when the right turn traffic volume (At) is more than 40% (Pr).

Right turn traffic volume (At) can be calculated by multiplying right turnable car ri (Rl) by the number of car trains (Cr) included in traffic volume.

The right turn traffic volume At is the right turn traffic volume At = the weight value Pr and the right turn approach traffic volume At is equal to the rotatable car Rl * (Cr) 'included in the traffic volume.

Fig. 5 is a diagram for explaining an example of calculating a right turn traffic amount? By a signal period in an intersection without a right turn private road.

The right judging device 100 judges whether or not the right turn traffic amount (right turn traffic amount) is obtained by considering the vehicle traveling direction time Hc during the signal period and the pedestrian existence time Pt can be calculated.

The pedestrian presence time (Pt) in the pedestrian crossing can be calculated by taking into account the lane width of the road, the speed of pedestrian movement, and the probability that a pedestrian exists on the pedestrian crossing with time.

The pedestrian existence time (Pt) on the pedestrian crossing is '((3m * 8) / (1.2m / s)) * 0.7' when the lane width of the roundabout 8 lane road is 3m and the pedestrian moving speed is 1.2m / Lt; RTI ID = 0.0 &gt; 14 &lt; / RTI &gt;

The time (Rat) at which the vehicle can turn right can be calculated by the difference between the sum of the vehicle traveling direction times (Hc) and the pedestrian existence time (Pt) in the pedestrian crossing.

5, when the running time of the vehicle is 39, 28, 35 seconds, the pedestrian presence time of the right turn pedestrian crossing 1 is 30 seconds, and the pedestrian presence time of 2 is 20 seconds, The available time (Rat) can be calculated as 52 seconds of (39 + 28 + 35) - (30 + 20) '. The suitability discriminating apparatus 100 can determine 27 turns of 1 * 27, which is the product of Rl and the number Cr of vehicle trains, of the right turn traffic amount [gamma] that rotates the intersection rightward in one lane Rl in the 52 seconds have.

When the right turn traffic amount? Is determined, the suitability determining device 100 can calculate the signal period traffic amount A by adding the straight traffic amount?, The left turn traffic amount?, And the right turn traffic amount?

Referring again to FIG. 1, the second traffic volume calculator 120 calculates the point traffic volume B using the vehicle speed of the vehicle passing through the measurement point. That is, the second traffic volume calculator 120 may measure the traffic volume based on the vehicle speed data.

The second traffic volume calculator 120 may include a second calculator 121 and a second calculator 122.

The second calculating unit 121 calculates a moving distance according to the vehicle speed at the measuring point. That is, the second calculation unit 121 can calculate the maximum distance that the vehicle can move with respect to the speed.

The second calculation unit 122 calculates the point traffic volume B by dividing the calculated travel distance by the sum of the headway distance and the headway distance, and then multiplying the headway headway by the difference. That is, the second calculation unit 122 may calculate the point traffic amount B passing through the measurement point for a predetermined time using the travel distance, the headway distance, and the headway distance.

Hereinafter, an example of calculating the point traffic volume B by the second traffic volume calculator will be described with reference to FIG.

6 is a view for explaining the movement of the vehicle according to the speed and the speed for each road.

In the calculation of the point traffic volume B using the vehicle speed, the suitability discrimination device 100 can first extract speed data for each road.

6A illustrates an example in which roads to extract speed data are discriminated from map data. The suitability discrimination apparatus 100 can identify four roads (Roads 1 to 4) in four directions connected to an intersection have.

In Fig. 6 (b), it is exemplified that speed data for each fixed time is extracted with each of the identified Roads 1 to 4. As shown in Fig. 6 (b), the fitness determining device 100 can extract the velocity data in the roads 1 to 4 at intervals of 5 minutes (08:00, 08:05, ...) .

After extracting the time-specific speed data of the road on which the traffic volume is to be calculated, the fitness determining device 100 may calculate the point traffic volume B using the speed data.

(B) passing through one point on the road for a predetermined time (t) using the movable distance vt, the lane Rl, the headway distance h and the inter-vehicle distance g according to the speed v, ) Can be calculated by satisfying (vt / (h + g)) * Rl.

For example, when the car Rl 3, the cargo distance h 5m, the car distance g 1m, the speed v 20km, the point traffic volume passing through the measuring point for 5 minutes is ((20000 * (5/60)) / (1 + 5) * 3 and can be calculated as 833.

Referring again to FIG. 1, the control processor 130 compares the signal period traffic volume A with the point traffic volume B to determine whether the intersection signal period is appropriate. That is, the control processor 130 determines whether or not the current intersection signal period is appropriately set according to traffic conditions through comparison of sizes of different types of traffic volumes.

The control processor 130 may include a comparison unit 131, a determination unit 132, and an adjustment unit 133.

The comparing unit 131 compares the signal period traffic volume A with the spot traffic volume B. That is, the comparison unit 131 may compare the traffic volume calculated using the traffic signal period and the traffic volume calculated using the velocity data numerically.

The determination unit 132 may determine that the intersection signal cycle is appropriate or inappropriate based on the comparison result.

First, when the signal period traffic amount A is greater than the point traffic amount B as a result of the comparison by the comparison unit 131, the determination unit 132 may determine that the intersection signal period is inadequate. That is, if the signal period traffic amount A is larger, the determination unit 132 may determine that the intersection signal period required on the actual road has been exceeded, and may cause the adjustment unit 133 to perform adjustment to reduce the intersection signal period .

In this case, the adjusting unit 133 may change the value of at least one signal period of the intersection signal period, the straight signal period and the left-turn signal period according to the determination that the signal is inappropriate, thereby adjusting the intersection signal period.

In adjusting the intersection signal period, the adjusting unit 133 may adjust the intersection signal period by reducing the value of the relatively long signal period from the straight signal period and the left-hand signal period.

If the signal period traffic amount A is smaller than the point traffic amount B as a result of the comparison by the comparison unit 131, the determination unit 132 may determine that the intersection signal period is inadequate. That is, when the point traffic amount B is larger, the determination unit 132 determines that the intersection signal period is shorter than the signal period required on the road, and allows the adjustment unit 133 to perform adjustment to increase the intersection signal period have.

In this case, the adjusting unit 133 can adjust the intersection signal period by increasing the value of the relatively short signal period in the intersection signal period, the straight signal period, and the left-turn signal period according to the determination that the adjusting unit 133 is inappropriate.

If the signal period traffic amount A and the point traffic amount B coincide within the allowable range as a result of the comparison by the comparison unit 131, the determination unit 132 may determine that the intersection signal period is appropriate . That is, if the signal period traffic amount A and the point traffic amount B are the same, the determination unit 132 can determine that the current intersection signal period is ideally set according to the traffic conditions.

7 is a view for explaining an example of discriminating the suitability of an intersection signal period.

In the determination of the adequacy of the intersection signal period, the suitability discrimination device 100 can first compare different types of traffic.

That is, the adequacy determination apparatus 100 can compare the signal period traffic volume A calculated using the signal period for the road in the intersection with the point traffic volume B calculated using the loop detector, CCTV, speed data, and the like have.

Then, the suitability discriminating apparatus 100 can determine the suitability of the intersection signal period.

As a result of comparison, if the signal period traffic volume A and the branch traffic volume B are equal to each other in a certain range (for example, the traffic volume difference is within 2), the suitability discrimination device 100 regards the current intersection signal period as an ideal traffic signal period It can be judged.

At this time, since A = B =? +? +? ', The suitability discrimination apparatus 100 can derive? +? =? -B' (A: signal period traffic volume, B: , α: straight traffic volume, β: left turn traffic volume, γ: right turn traffic volume). Here, the right turn traffic amount? Does not have a great influence on the change of the signal period.

As the traffic volume is proportional to the signal period according to the calculation formula of the signal period traffic amount A, the suitability discrimination apparatus 100 calculates the time to be changed in the straight signal period t1, the left turn signal period t2 It is possible to estimate the values t1 'and t2'.

If the signal period traffic amount A is larger than the point traffic amount B as a result of the comparison, the suitability discrimination device 100 can determine that the current intersection signal period exceeds the signal period required on the actual road have.

In this case, as shown in Fig. 7, the adequacy discrimination apparatus 100 judges whether or not the signal cycle from B1 or B2 to B3, that is, the left-turn signal cycle (B1 to B3) It is possible to adjust the intersection signal period by reducing it in proportion to the traffic volume difference.

,

와 같은 좌회전 신호주기를 가져야 한다.For example, when the left turn traffic amount (?, B1? B3) is greater than the straight traffic amount (?, B2? B3), the suitability discrimination device 100 can determine that the left turn signal period should be reduced. As described above, the signal period is proportional to the traffic volume

,

Lt; / RTI &gt;

라고 할 때, 적정성 판별 장치(100)는

즉,

만큼을 좌회전 신호주기에서 감소시켜 조정할 수 있다.Therefore,

, The suitability discriminating apparatus 100 judges

In other words,

Can be adjusted by reducing in the left-turn signal period.

이고,

이므로, 적정성 판별 장치(100)는

즉,

만큼을 직진 신호주기에서 감소시켜 조정할 수 있다.In another example, when the straight traffic amount (?, B2? B3) is larger than the left turn traffic amount?, B1? B3, the suitability determining device 100 can determine that the straight forward signal cycle should be reduced. Proportionally

ego,

, The suitability discriminating apparatus 100

In other words,

Can be adjusted by reducing in the straight signal cycle.

If the comparison result shows that the point traffic amount B is larger than the signal period traffic amount A, the suitability discrimination apparatus 100 may determine that the current intersection signal period is shorter than the signal period required on the actual road.

In this case, as shown in Fig. 7, for the left-turn signal period (B1 - &gt; B3) and the straight signal period B2 - B3, the suitability discrimination apparatus 100 increases in proportion to the traffic volume difference, Can be adjusted.

For example, when the left turn traffic amount (?, B1? B3) is greater than the straight traffic amount (?, B2? B3), the suitability discrimination device 100 can determine that the straight ahead signal period should be increased.

, 즉

만큼을 직진 신호주기에서 증가시켜 조정할 수 있다.By the proportional expression, the suitability discriminating apparatus 100

, In other words

Can be adjusted by increasing in the straight signal cycle.

, 즉

만큼을 좌회전 신호주기에서 증가시켜 조정할 수 있다.In another example, when the straight traffic amount (?, B2? B3) is larger than the left turn traffic amount?, B1? B3, the suitability determining device 100 can determine that the left turn signal period should be increased. By the proportional expression, the suitability discriminating apparatus 100

, In other words

Can be adjusted by increasing in the left-turn signal period.

For example, it is assumed that the straight traffic volume is 93, the left turn traffic volume is 24, the right turn traffic volume is 15, the spot traffic volume is 100, the straight signal period is 73 seconds, and the left turn signal period is 28 seconds.

At this time, when the signal period traffic amount A is larger than the point traffic amount B, the suitability discrimination device 100 can confirm that the straight traffic amount is larger than the left turn traffic amount, thereby reducing the straight signal period.

That is, the suitability discriminating apparatus 100,

=

And the straight signal period can be reduced by 2 seconds.

The rectilinear traffic volume by the straight ahead signal can be changed to 60 and the signal period traffic volume A becomes 99 of 60 + 24 + 15, And the appropriate intersection signal period can be reached.

According to the present invention, the adequacy of the intersection signal period can be accurately determined through comparison between the signal period traffic amount calculated using the traffic signal period and the point traffic amount calculated using the vehicle speed.

Further, according to the present invention, it is possible to determine appropriateness of an intersection signal cycle by mutual comparison with different types of traffic volumes, and to immediately adjust the intersection signal cycle according to a current traffic situation according to the discrimination result.

According to the present invention, it is possible to quickly identify the problem of an intersection signal at a traffic control department of a local municipality that is in charge of traffic signal light control tasks such as a local police station traffic department and a road traffic corporation, It can help to determine the cycle.

According to the present invention, it is possible to provide not only simple information such as slowness, smoothness, and congestion that is provided in the traffic information service center but traffic volume information of the road. In addition, when traffic congestion occurs due to a signal cycle, And can provide services to citizens.

Also, according to the present invention, when a portal site company provides a recommendation road service according to a departure location and a destination route to a user, it can provide an optimal recommended road that reflects congestion due to traffic volume and traffic signal cycle. For example, if there is a route from A (origin) -> B (route) -> C (destination), then according to the present invention, A (origin) -> F ) Can be provided to the user.

In addition, according to the present invention, various ITS companies designing a traffic information system or a UTIS company that provides detailed traffic information reflecting real-time traffic information can identify traffic information and congestion according to time-based signals, And can serve the user.

Hereinafter, an operational flow of the traffic signal period suitability discriminating apparatus 100 according to an embodiment of the present invention will be described in detail.

FIG. 8 is a flowchart illustrating a method of determining the suitability of a traffic signal period according to an exemplary embodiment of the present invention. Referring to FIG.

The adequacy determination method according to the present embodiment can be performed by the above-described traffic signal cycle adequacy determination apparatus 100. [

(The adequacy discrimination apparatus 100) calculates the signal period traffic volume A according to the intersection signal period at the in-road measurement point connected to the intersection (810). Step 810 may be a process of measuring the amount of traffic flow at the measurement point by the current intersection signal period.

In step 810, the suitability discriminating apparatus 100 can determine the straight traffic amount [alpha] crossing the intersection and the left turn traffic amount [beta] that rotates the intersection to the left. That is, the suitability discriminating apparatus 100 can determine the amount of the vehicle reaching the measurement point via the intersection based on the straight-ahead signal period and the left-turn signal period in the intersection signal period.

In determining the rectilinear traffic volume [alpha], the suitability discrimination device 100 calculates, by vehicle train, a passing distance required to reach the measurement point across the intersection at the stop position.

For example, for a vehicle having a lane width of 3 m and passing through an eight-lane intersection with a length of 1 m on both sides of the road, the suitability discriminating apparatus 100 determines that the passage distance of one row is 25 m, And the passing distance of three columns is 37 m.

That is, the adequacy discrimination apparatus 100 can calculate the passage distance on the basis of the formula '25 +6 (r-1) '(r is the vehicle train) at the intersection of the example.

Also, the adequacy discrimination apparatus 100 can calculate the movable distance that is movable for each of the vehicle columns while the straight signal cycle is maintained. For example, under the assumption that an intersection with a straight-ahead signal period of 73 seconds and a speed limit of 60 km is accelerated from a stop to a speed of 10 km per hour, the suitability determining apparatus 100 sets the movable distance of one row at (10000 m / 3600 + (10000 m / 3600 + 20000 m / 3600 ... + 50000 m / 3600 + (60000 m / 3600) * (7100-6000 m / 3600 + 5)), it is possible to calculate the movable distance of three rows by (10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 3600) * (69-5)).

That is, the suitability discrimination apparatus 100 calculates the sum of the movable distances according to the acceleration of 10 km per hour up to 5 seconds, and calculates (60000m / 3600) * (t-2 -1) -5) '(t is the holding time of the straight signal period, and r is the vehicle train).

'(t은 직진 신호주기의 유지시간)에 의거하여 연산할 수 있다.In short, the correctness discrimination apparatus 100, at the intersection of the example,

(t is the holding time of the straight-ahead signal cycle).

Also, the suitability discriminating apparatus 100 can count the number of vehicle trains in which the passing distance is shorter than the movable distance. That is, the suitability discriminating apparatus 100 can serve to count a vehicle train that can pass through an intersection because the movable distance is longer than the passing distance.

In the above example, in the case of one column, since the passing distance '25 m' is shorter than the movable distance '1175.16 m', the suitability discriminating apparatus 100 can count the one row.

In the case of 31 rows, the passing distance '205 m' is longer than the movable distance '174.96 m', and the adequacy discrimination apparatus 100 does not count the 31 rows.

That is, the suitability discrimination apparatus 100 can count the number of vehicle trains in which the passing distance is shorter than the movable distance with respect to the intersection, as '30' from the first row to the 30th row of the vehicle train.

Then, the adequacy discrimination device 100 can determine the straight traffic volume [alpha] by multiplying the number of counts by the straight ahead player. In the above example, the adequacy discrimination apparatus 100 can determine 90 cars as the straight traffic volume (?) By multiplying the number of straight cars (three lanes of one lane four lanes) by the counted number '30'.

In the determination of the left turn traffic amount [beta], the suitability discrimination device 100 can calculate the passing distance required for reaching the measurement point by rotating the intersection to the left at the stop position for each vehicle train. For example, in the case of a vehicle in which an eight-lane intersection is to be rotated to the left, as in the determination of the straight traffic volume [alpha], the adequacy discrimination device 100 determines that the passage distance of one row is 25 m, And the passing distance of three columns is 37 m.

That is, the adequacy discrimination apparatus 100 can calculate the passage distance on the basis of the formula '25 +6 (r-1) '(r is the vehicle train) at the intersection of the example.

Further, the adequacy discrimination device 100 calculates the movable distance that is movable for each vehicle train while the left-turn signal period is maintained. For example, under the assumption that an intersection with a left-turn signal period of 28 seconds and a speed limit of 60 km is accelerated from a stop to a speed of 10 km per hour, the suitability discrimination apparatus 100 sets the movable distance of one row at (10000 m / 3600 + 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 3600) * (2600-3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 3600) * (28-5) 5), it is possible to calculate the movable distance of three rows by (10000m / 3600 + 20000m / 3600 ... + 50000m / 3600 + (60000m / 3600) * (24-5)).

That is, the suitability discrimination apparatus 100 calculates the sum of the movable distances according to the acceleration of 10 km per hour up to 5 seconds, and calculates (60000m / 3600) * (t-2 -1) -5) '(t is the holding time of the left turn signal period, and r is the vehicle train).

'(t은 좌회전 신호주기의 유지시간)에 의거하여 연산할 수 있다.In short, the correctness discrimination apparatus 100, at the intersection of the example,

(t is the holding time of the left-turn signal period).

Also, the suitability discriminating apparatus 100 can count the number of vehicle trains in which the passing distance is shorter than the movable distance. That is, the suitability discriminating apparatus 100 can serve to count a vehicle train that can pass through an intersection because the movable distance is longer than the passing distance.

In the above example, in the case of one column, since the passing distance '25 m' is shorter than the movable distance '1175.16 m', the suitability discriminating apparatus 100 can count the one row.

In the case of 12 rows, the passing distance '91 m' is longer than the movable distance '58.27 m', and the adequacy discrimination apparatus 100 does not count the 12 rows.

That is, the suitability discriminating apparatus 100 can count the number of vehicle trains in which the passing distance is shorter than the movable distance with respect to the intersection, as '11' from the first row to the 10th row of the vehicle train.

Then, the adequacy discrimination apparatus 100 can determine the left-turn traffic amount [beta] by multiplying the left-turn preceding player by the counted number. In the above example, the adequacy determination device 100 can determine eleven cars as the straight traffic volume (?) By multiplying the counted number &quot; 11 &quot; by the left turn lane player (one lane of one lane four lanes).

After the straight traffic volume α and the left turn traffic volume β are determined, the suitability discrimination apparatus 100 may calculate the signal cycle traffic volume A by summing the straight traffic volume α and the left turn traffic volume β . For example, the signal period traffic amount A at the measuring point related to the above-mentioned intersection can be calculated as 101 by summing the straight traffic amount alpha '90' and the left turn traffic amount '11'.

In step 810, the suitability discrimination apparatus 100 calculates a right turn traffic volume γ for the vehicle turning right at the intersection, based on the presence or absence of the right turn-only vehicle or the position of the measurement point, ) Can be selectively included in the calculation.

First, when the measurement point is located in the vehicle flow direction of the right-turn exclusive vehicle at the intersection, the suitability determining apparatus 100 can determine the right turn traffic amount? Passing through the right turn private road. In other words, if there is a right-turn-only vehicle that allows the vehicle to always turn right by a dedicated right-turn signal cycle irrespective of other signal periods of the intersection, and if the vehicle can reach the measurement point via the right- The right turn traffic amount? Can be additionally determined.

In the determination of the right turn traffic amount (?) Related to the right turn exclusive vehicle, the suitability discrimination device 100 can count the number of vehicle trains reaching the measurement point through the right turn exclusive vehicle while the right turn signal period is maintained have. The right turn signal cycle for driving the right turn vehicle to the right turn exclusive vehicle usually indicates that the right turn can be made except for the pedestrian signal traversing the right turn private vehicle path. In proportion, the number of vehicle trains reaching the measurement point can be counted.

The suitability discriminating apparatus 100 can determine the right turn traffic amount γ by applying a predetermined weight to a value obtained by multiplying a difference between the difference between the difference between the difference in the number of the right turn right vehicle and the counted number. Here, the weight value may be a numerical value according to the actual ratio of the right turn exclusive vehicle, and may be set to, for example, 40% (0.4).

For example, when the number of lanes to the right turn exclusive vehicle is one and the number of vehicle trains reaching the measurement point through the right turn exclusive vehicle is 40, the suitability discrimination apparatus 100 judges that 16 Can be determined as the right turn traffic amount (?).

After determining the right turn traffic amount?, The suitability determining device 100 may calculate the signal traffic traffic amount A by further adding the right turn traffic amount?. For the 101 vehicles (straight traffic volume [alpha] '90 cars + left turn traffic volume [beta]' 11 cars') obtained in the above example, the suitability discrimination device 100 adds the right turn traffic volume [ , The signal period traffic volume (A) at the measuring point can be calculated as '117 units'.

If there is no right-side turn-by-turn vehicle at the intersection, the correctness-determining device 100 can determine the right-turn traffic amount γ that rotates right at the intersection in consideration of the right turnable time.

In the determination of the right turn traffic amount (?), The suitability discrimination device (100) subtracts the time when the pedestrian exists on the crosswalk of the intersection from the sum of the time set in the vehicle progression in the intersection signal period, Can be calculated as time. That is, the adequacy discrimination apparatus 100 determines whether or not the right turnable time (a part of the right turn signal period, a part of the red light, etc.) from which the vehicle is allowed to proceed to the right turn at the intersection, Can be calculated.

The suitability discriminating apparatus 100 may count the number of vehicle trains reaching the measurement point via the intersection for the calculated right turnable time. The right turn signal cycle may not be separately set at the intersection so that the right turn vehicle can make a right turn while viewing the traffic situation of the intersection for the right turnable time calculated previously. The suitability discriminating apparatus 100 can count the number of vehicle train reaching the measuring point in proportion to the time when the right turnable time is maintained.

The adequacy discrimination apparatus 100 can determine the right turn traffic amount [gamma] by multiplying the number of counts by the right turn runner.

For example, when the number of right turn lanes is 1 and the number of vehicle trains reaching the measurement point via the intersection during the right turnable time is 28, the adequacy discrimination device 100 judges that 28 cars of '1 * 28' (?).

After determining the right turn traffic amount?, The suitability determining device 100 may calculate the signal traffic traffic amount A by further adding the right turn traffic amount?. The adequacy discrimination apparatus 100 compares the right turn traffic amount (?) '28 units' with the 101 units (the straight traffic volume? 90 units + the left turn traffic volume? , The signal period traffic volume (A) at the measuring point can be calculated as '129 units'.

Further, the suitability discriminating apparatus 100 calculates the point traffic B using the vehicle speed of the vehicle passing through the measuring point (820). Step 820 may be a process of measuring traffic volume based on vehicle speed data.

In step 820, the suitability determining apparatus 100 may calculate a travel distance corresponding to the vehicle speed at the measurement point. That is, the suitability discriminating apparatus 100 can calculate the maximum distance the vehicle can move with respect to the speed.

The suitability discriminating apparatus 100 may calculate the point traffic volume B by dividing the calculated travel distance by the sum of the headway distance and the headway distance, That is, the suitability discriminating apparatus 100 can calculate the point traffic volume B passing through the measuring point for a predetermined time using the moving distance, the car head distance, and the headway distance.

Next, the adequacy determination apparatus 100 compares the signal period traffic volume A with the point traffic volume B to determine whether the intersection signal period is appropriate (830, 840 850). That is, the adequacy determination device 100 serves to determine whether the current intersection signal period is appropriately set according to traffic conditions through comparison of sizes of different traffic volumes. In steps 830, 840, and 850, the suitability determining apparatus 100 can numerically compare the traffic volume calculated using the traffic signal period and the traffic volume calculated using the speed data.

As a result of comparison, if the signal period traffic amount A is greater than the point traffic amount B (830), the suitability discrimination apparatus 100 may determine that the intersection signal period is inappropriate.

Accordingly, if the signal period traffic amount A is larger, the suitability discrimination device 100 may determine that the intersection signal period is exceeded on the actual road, and perform adjustment to reduce the intersection signal period (835).

In step 835, the suitability determining device 100 changes the value of at least one signal period in the intersection signal period, the straight signal period, and the left-turn signal period to adjust the intersection signal period .

In the adjustment of the intersection signal period, the suitability discrimination apparatus 100 may adjust the intersection signal period by reducing the value of the relatively long signal period among the straight signal period and the left-turn signal period.

If the signal period traffic amount A is smaller than the point traffic amount B in step 850, the suitability determination apparatus 100 may determine that the intersection signal period is inappropriate.

Accordingly, the suitability discrimination apparatus 100 may determine that the intersection signal period is shorter than the signal period required in the road if the point traffic amount B is larger (855), and may perform adjustment to increase the intersection signal period.

In step 855, the suitability discrimination apparatus 100 increases the value of the relatively short signal period in the intersection signal period, the straight signal period and the left-turn signal period according to the judgment that it is improper, have.

If the signal period traffic volume A and the point traffic volume B match within the allowable range as a result of the comparison (840), the suitability discrimination device 100 can determine that the intersection signal period is appropriate.

Accordingly, when the signal cycle traffic volume A and the branch traffic volume B are the same, the adequacy discrimination apparatus 100 determines that the current intersection signal cycle is ideally set in accordance with the traffic situation, and maintains the current intersection signal cycle (845).

According to the present invention, the adequacy of the intersection signal period can be accurately determined through comparison between the signal period traffic amount calculated using the traffic signal period and the point traffic amount calculated using the vehicle speed.

Further, according to the present invention, it is possible to determine appropriateness of an intersection signal cycle by mutual comparison with different types of traffic volumes, and to immediately adjust the intersection signal cycle according to a current traffic situation according to the discrimination result.

The method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI &gt; or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: Appropriateness of traffic signal cycle
110: First traffic volume calculator
111: Decision section 112: First calculation section
113: first calculation unit 114:
120: Second traffic volume calculator
121: second calculation unit 122: second calculation unit
130: control processor
131: comparing unit 132:
133:

Claims (10)

Calculating a signal period traffic volume according to an intersection signal period at a measurement point in the road connected to the intersection;
Calculating a point traffic volume using a vehicle speed of the vehicle passing through the measurement point; And
Comparing the signal period traffic volume with the point traffic volume to determine whether the intersection signal period is appropriate
The method comprising the steps of: The method according to claim 1,
Wherein the step of calculating the signal period traffic volume comprises:
Determining a straight traffic volume across the intersection;
Determining an amount of left turn traffic that rotates left at the intersection; And
Calculating the signal period traffic volume by summing the straight traffic volume and the left turn traffic volume
The method comprising the steps of: 3. The method of claim 2,
Wherein the step of determining the straight traffic volume comprises:
Calculating, at a stop position, a passage distance necessary for reaching the measurement point across the intersection, by vehicle train;
Calculating, for each of the vehicle train, a movable distance that the vehicle travels while the straight-ahead signal cycle is maintained;
Counting the number of vehicle trains in which the passing distance is shorter than the movable distance; And
A step of multiplying the number of counts by the straight ahead player and determining the straight traffic volume
The method comprising the steps of: 3. The method of claim 2,
The step of determining the left-
Calculating, at a stop position, a passage distance required to reach the measurement point by rotating the intersection to the left by vehicle train;
Calculating, for each of the vehicle train, a movable distance that is movable while a left-turn signal cycle is maintained;
Counting the number of vehicle trains in which the passing distance is shorter than the movable distance; And
Determining a left-turn traffic amount by multiplying the number of counts by the number of left-
The method comprising the steps of: 3. The method of claim 2,
When the measurement point is located in the vehicle flow direction of the right turn special vehicle of the intersection,
Wherein the step of calculating the signal period traffic volume comprises:
Determining a right turn traffic amount passing through the right turn private road; And
Calculating the signal period traffic volume by further adding the right turn traffic volume
Further comprising the step of: 3. The method of claim 2,
In the case where there is no right-turning exclusive vehicle at the intersection,
Wherein the step of calculating the signal period traffic volume comprises:
Determining a right turn traffic amount that rotates to the right of the intersection in consideration of a possible right turn time; And
Calculating the signal period traffic volume by further adding the right turn traffic volume
Further comprising the step of: The method according to claim 1,
Wherein the step of calculating the point traffic volume comprises:
Calculating a travel distance according to the vehicle speed at the measurement point; And
Calculating the point traffic by dividing the calculated traveling distance by the sum of the headway distance and the headway distance,
The method comprising the steps of: The method according to claim 1,
Wherein determining whether the intersection signal period is appropriate comprises:
Determining that the intersection signal cycle is inappropriate if the signal cycle traffic volume is greater than the point traffic volume; And
Adjusting the intersection signal period by decreasing the value of the relatively long signal period in the intersection signal period, the straight signal period and the left-turn signal period,
The method comprising the steps of: The method according to claim 1,
Wherein determining whether the intersection signal period is appropriate comprises:
Determining that the intersection signal cycle is improper when the signal cycle traffic volume is less than the point traffic volume; And
Adjusting the intersection signal period by increasing the value of the relatively short signal period in the intersection signal period, the straight signal period and the left-turn signal period,
The method comprising the steps of: The method according to claim 1,
Wherein determining whether the intersection signal period is appropriate comprises:
If it is determined that the intersection signal period is appropriate if the signal cycle traffic volume and the point traffic volume match within the allowable range
The method comprising the steps of:

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