TWI444933B - Method to direct vehicles - Google Patents

Description

Driving instruction method

The present invention relates to a driving indication method, and more particularly to a driving indication method for evaluating whether a vehicle can pass a downstream intersection at a predetermined rate after passing through a current intersection.

According to the current situation, in order to solve the problem of traffic congestion at various traffic intersections, the conventional driving instruction method adjusts the action time of the traffic sign to divert traffic flow through the traffic intersection. In addition, it can also display different states of the traffic sign ( For example, the remaining time of the state of green light or red light stop, let the driver of the vehicle ready to pass the traffic intersection know the remaining time, which can reduce the number of sudden acceleration or rapid deceleration of the vehicle at the intersection to reduce the traffic accident. Rate and vehicle wear and tear.

However, when the driver of the vehicle is in a hurry, for example, when the arrival time arrives quickly, if the vehicle accelerates past the current intersection and encounters a red light at the downstream intersection and is blocked, the driver will follow the passage of time. In anxious, in order to arrive at the destination in time, follow-up driving behaviors such as rushing yellow light or red light may increase the risk of many traffic accidents. At this time, if the driver can know in advance that the vehicle passes the current intersection, can he pass the downstream intersection at a predetermined rate in time? If you can't pass the downstream intersection in time, you can first move to the road segment with different driving direction (for example: left turn or right turn) and continue to travel with other roads to reach the destination safely.

In summary, it is necessary to improve the above-mentioned driving instruction method so that the driver can "pre-determine whether the vehicle can be pre-arranged before the vehicle passes the current intersection. Speeding through the downstream intersections in time, avoiding the risk of traffic accidents caused by the driver's time pressure and effectively increasing road utilization.

It is an object of the present invention to improve the above-discussed shortcomings to provide a driving indication method for assessing whether a vehicle can pass through a downstream intersection at a predetermined rate after passing through an intersection for the driver to use as a driving reference.

A driving instruction method includes: a preparation step of obtaining a first interval and a reference rate from a processing unit to a database, and obtaining an upstream start time and an upstream end time from an upstream directory, and then A downstream sign obtains a downstream start time and a downstream end time; a departure time calculation step is performed by the processing unit according to the mark interval and the reference rate, and then according to the downstream start time and the travel time Calculating a departure start time, and calculating a departure end time according to the downstream end time and the travel time; and determining, by the processing unit, whether the departure start time is later than the upstream end time, and the departure Whether the end time is earlier than the upstream start time, if the above judgment result is yes, it is determined that the pass opportunity of the downstream log does not exist, otherwise, a pass time calculation step is performed; and the pass time calculation step is performed by the processing unit Taking the maximum value of the upstream start time and the departure start time as one Time, to take the upstream end and the departure time and the end time as a minimum sum of both by the end time as the semaphore upstream traffic indication information.

Among them, the calculation method of the driving time is as follows: For the travel time, d is the distance of the mark, and v is the reference rate.

Here, the calculation method of the departure start time GS2' is as follows: gs2' = gs2-t, gs2' is the departure start time GS2', gs2 is the downstream start time, and t is the travel time.

Here, the calculation method of the departure end time GE2' is as follows: ge2' = ge2-t, ge2' is the departure end time GE2', gs2 is the downstream start time, and t is the travel time.

The calculation of the start time is as follows: ps=Max{gs1, gs2'}, ps is the transit start time, gs1 is the upstream start time, and gs2' is the departure start time GS2'.

Here, the calculation method of the passage end time is as follows: pe = Min{ge1, ge2'}, pe is the passage end time, ge1 is the upstream end time, and ge2' is the departure end time GE2'.

The pass time calculation step is further performed by the processing unit by subtracting the pass start time from the end time to obtain a pass duration, as shown in the following formula: pc=pe-ps, pc is the pass duration, pe For the pass end time, ps is the pass start time.

The above and other objects, features and advantages of the present invention will become more <RTIgt; "No." means a traffic sign set at the upstream intersection of a bus section when the vehicle is traveling in a row of vehicles. The upstream number includes a No. 1 light group and a control. The module is configured to display a red, yellow or green light, wherein the green light period of the upstream symbol is from an upstream start time to an upstream end time; the location of the upstream log and the change time of the light number are As a basis for calculation of parameters such as distance or time of adjacent traffic signs. As shown in FIG. 3, when a vehicle H travels in a row of vehicle direction R, an upstream number 13a passing through the vehicle H is used as a calculation reference for the above parameters, which is generally known to those skilled in the art to which the present invention pertains. understanding.

The "downstream sign" as used throughout the text of the present invention refers to a traffic sign set at the downstream intersection of a row of road segments when the vehicle is traveling in a row of vehicles, and the vehicle encounters after passing the upstream sign. The next traffic number to be the downstream number is the downstream number, which includes a number one light group and a control module for displaying red, yellow or green lights, wherein the downstream green light The time period is from a downstream start time to a downstream end time; the distance or time between the downstream number and the upstream number is determined based on the location of the upstream code and the change time of the light number. As shown in FIG. 3, when the vehicle H travels in the traveling direction R, the vehicle H will encounter the downstream number 13b after passing through the upstream number 13a, which is a common knowledge in the technical field to which the present invention pertains. Can understand.

The "green light period" as described throughout the present invention refers to a time period in which a traffic sign displays a green light. As shown in Fig. 3, the green time periods of the upstream number 13a and the downstream number 13b are denoted as Ga and Gb, respectively, which can be understood by those having ordinary knowledge in the technical field to which the present invention pertains.

The "upstream start time" as used throughout the present invention refers to the start time value of a green light indicating an upstream number, for example, 13:05:20. As shown in Fig. 3, the start time of the green light period Ga of the upstream number 13a The value of an upstream start time GS1 is understood by those of ordinary skill in the art to which the present invention pertains.

The "upstream end time" as used throughout the present invention refers to an upstream time indicating the end time value of the green light, for example, 13:06:10. As shown in Fig. 3, the end time value of the green time period Ga of the upstream number 13a is an upstream end time GE1, which can be understood by those of ordinary skill in the art to which the present invention pertains.

The "downstream start time" as used throughout the present invention refers to a start time value of a downstream sign indicating a green light, for example, 13:05:50. As shown in Fig. 3, the start time value of the green light period Gb of the downstream number 13b is a downstream start time GS2, which can be understood by those having ordinary knowledge in the technical field to which the present invention pertains.

The "downstream end time" as used throughout the present invention refers to the end time value of a downstream sign indicating a green light, for example, 13:06:40. As shown in Fig. 3, the end time value of the green time period Gb of the downstream number 13b is a downstream end time GE2, which can be understood by those of ordinary skill in the art to which the present invention pertains.

The "signal spacing" as used throughout the present invention refers to the set distance between adjacent traffic signs, for example, 400 meters. As shown in Fig. 3, the number one spacing D is the distance between the upstream number 13a and the downstream number 13b, as will be understood by those of ordinary skill in the art to which the present invention pertains.

The "reference rate" as used throughout the text of the present invention refers to the driving rate used by the vehicle driver when the vehicle is driving on the road section where the adjacent traffic number is located, for example, 80% of the maximum speed limit of the road section, etc. . As shown in Figure 3 As shown, when the vehicle H travels in the row direction R, the rate at which the vehicle H travels between the upstream number 13a and the downstream number 13b is a reference rate V, which is generally in the technical field of the present invention. Knowledge people can understand.

The "travel time" as used throughout the present invention refers to the time when the vehicle travels at the reference rate and arrives at the location of the downstream symbol by the location of the upstream symbol. As shown in FIG. 3, when the vehicle H travels in the traveling direction R at the reference rate V, the vehicle H travels from the upstream number 13a to the downstream number 13b for a line time T, which is the present invention. Those of ordinary skill in the art will understand.

The "starting time of departure" as used throughout the text of the present invention refers to the earliest time value to be departed from the upstream sign when the vehicle intends to travel through the downstream sign at the reference rate. As shown in FIG. 3, when the vehicle H wants to travel through the downstream number 13b at the reference rate V, the earliest time value to be departed from the upstream number 13a is a departure start time GS2', which belongs to the present invention. Those of ordinary skill in the art will understand.

The "departure end time" as used throughout the present invention refers to the latest time value that must be elapsed from the upstream sign when the vehicle desires to travel through the downstream sign at the reference rate. As shown in FIG. 3, when the vehicle H wants to travel through the downstream number 13b at the reference rate V, the latest time value to be departed from the upstream number 13a is a departure end time GE2', which is the present invention. Those of ordinary skill in the art will understand.

The "Cycle Length" as used throughout the text of the present invention refers to the signal number of the traffic signals belonging to the group when the traffic signals set at the adjacent intersections belong to the same traffic control group. Cycle time length. Such as the first As shown in Fig. 3, the group period followed by the upstream number 13a and the downstream number 13b belonging to the same group is denoted as C, which can be understood by those having ordinary knowledge in the technical field to which the present invention pertains.

The "offset" as described throughout the present invention refers to the difference in the green light on time of the adjacent two traffic signals in the direction of travel. As shown in Fig. 3, the time difference between the upstream start time GS1 of the upstream number 13a and the downstream start time GS2 of the downstream number 13b is expressed as F, which can be understood by those having ordinary knowledge in the technical field to which the present invention pertains.

The "passing opportunity" as described throughout the present invention refers to the opportunity for the vehicle to travel through the downstream number after the upstream number is estimated. As shown in FIG. 3, when the vehicle H passes the upstream number 13a, it is estimated that the vehicle H can travel through the downstream rate 13b, and the opportunity to pass the downstream number 13b is common in the technical field to which the present invention pertains. Knowledge people can understand.

Referring to FIG. 1 , which is a system architecture diagram of a preferred embodiment of the driving indication method of the present invention, wherein the driving indication method of the present invention pre-frames the traveling instruction system 1 to perform the relevant steps of the driving indication method. The driving instruction system 1 includes a processing unit 11, a database 12, and a plurality of traffic signals 13. The processing unit 11 is connected to the database 12 for performing the relevant steps of the driving instruction method of the present invention. The database 12 is configured to store data data and adjacent two traffic numbers required by the processing unit 11 for calculating and determining. The setting distance between the 13 and the reference rate of a vehicle; the traffic number 13 can be set at the intersection of the road, and the traffic number 13 can be electrically coupled to the processing unit 11 by wire or wirelessly. And transmitting its signal status to the processing unit 11, which is well known in the art It can be understood that it is not described here. The subsequent content is described as an implementation example (as shown in FIG. 3), which is disposed at one of the adjacent intersections 13a and a downstream number 13b, but is not limited thereto.

Referring to FIG. 2, it is an operational flowchart of a preferred embodiment of the driving instruction method of the present invention, which includes a preparation step S1, a departure time calculation step S2, a pass opportunity determination step S3, and a transit time calculation. Step S4. Please refer to FIG. 1 and FIG. 3 together, wherein FIG. 3 is a time-space correlation diagram (or space-time diagram) of a preferred embodiment of the driving indication method of the present invention: In the preparation step S1, the processing unit 11 obtains a first-order spacing D and a reference rate V from the database 12, and obtains an upstream start time GS1 and an upstream end time GE1 from the upstream number 13a, and then The downstream sign 13b takes a downstream start time GS2 and a downstream end time GE2. In detail, as shown in FIG. 3, when a vehicle H travels in a row of vehicle directions R and will pass through the upstream number 13a and the downstream number 13b, the processing unit 11 can be received by a database 12. The mark spacing D and the reference rate V (for example: 80% of the maximum speed limit of the road section, etc.). Moreover, since the upstream number 13a and the downstream number 13b both cyclically change the state of the light according to a cycle length C, for example: red light (60 seconds) → yellow light (5 seconds) → green light ( 50 seconds) → red light (60 seconds) →... Therefore, the processing unit 11 can also obtain the group period C, and according to the time difference (Offset) F between the green time period Ga of the upstream number 13a and the green time period Gb of the downstream number 13b, The start and end times of the green light periods Ga and Gb are known.

Wherein, the green time period Ga of the upstream number 13a is opened by the upstream The start time GS1 (i.e., when the time value is 0) is displayed to the upstream end time GE1; moreover, the green time period of the downstream sign 13b is displayed by the downstream start time GS2 to the downstream end time GE2. If the vehicle H passes through the upstream number 13a and wants to successfully pass the downstream number 13b at the reference rate V, the subsequent information to be estimated by the processing unit 11 includes: a departure time information and a timely departure information. 〞, the departure time information is used to indicate when the vehicle H should start from the upstream number 13a to obtain the green time period Gb of the downstream number 13b; the timely departure information is used to indicate the vehicle H Whether or not the upstream number 13a can be surely passed at the time when the departure should be made, that is, whether the time when the vehicle H should start is between the green time period Ga of the upstream number 13a.

Referring to FIG. 1 to FIG. 3 again, the departure time calculation step S2 is performed by the processing unit 11 according to the log spacing D and the reference rate V, and then according to the downstream start time GS2 and the The travel time T calculates a departure start time GS2', and calculates a departure end time GE2' based on the downstream end time GE2 and the travel time T. In detail, since the processing unit 11 can learn the green light period Gb of the downstream number 13b according to the downstream start time GS2 and the downstream end time GE2, if the vehicle H is at the reference rate V by the upstream number The driver 13a travels to the downstream number 13b, so that if the opportunity to pass the vehicle H reaches the downstream number 13b (i.e., whether the green time period Gb can be encountered), the processing unit 11 can depend on the distance and The relationship between the rates, and the time interval D of the vehicle and the reference rate V are used to calculate the travel time T of the vehicle H, as shown in the following formula (1): Where t is the driving time T; d is the number spacing D; v is the reference rate V.

Next, the processing unit 11 can estimate when the vehicle H must pass the upstream number 13a (ie, start from the upstream number 13a) to encounter the green time period Gb when the downstream number 13b is reached. First, the processing unit 11 can estimate when the vehicle H can pass the upstream number 13a at the earliest time, for example, calculate the difference between the downstream start time GS2 and the driving time T, as the vehicle H can pass the upstream number The departure start time GS2' of 13a is as shown in the following formula (2): gs2'=gs2-t (2) where gs2' is the departure start time GS2'; gs2 is the downstream start time GS2; t is the travel time T.

Thereafter, the processing unit 11 can estimate when the vehicle H must pass the upstream number 13a at the latest, for example, calculate the difference between the downstream end time GE2 and the driving time T, as the vehicle H must pass the upstream at the latest. The departure end time of the sign 13a is GE2', as shown in the following formula (3): ge2'=ge2-t (3) where ge2' is the departure end time GE2', that is, the vehicle H can pass the upstream number at the latest Time of the 13a; gs2 is the downstream start time; t is the travel time. Therefore, the vehicle H must start from the upstream number 13a between the departure start time GS2' and the departure end time GE2' to encounter a green light when reaching the downstream number 13b.

Please refer to the first to third figures, the pass opportunity judgment step S3 Is the processing unit 11 determining whether the departure start time GS2' is later than The upstream end time GS1, and whether the departure end time GE2' is earlier than the upstream start time GS1, and if the determination result is "Yes", it is determined that the pass opportunity of the downstream note 13b is "not present"; otherwise, the determination is made. The passage opportunity of the downstream token 13b "exists", and the passage time calculation step S4 is performed. In detail, after the processing unit 11 knows that "the time period in which the vehicle H is to be departed from the upstream number 13a", it is still necessary to confirm whether "the time period during which the vehicle H must be departed from the upstream number 13a" is "between" The green light period Ga" of the upstream number 13a.

Please refer to FIG. 3 again, in which "the departure start time GS2" and the departure end time GE2' are not in any green time period Ga" of the upstream number 13a, in other words, "the departure start time GS2" 'Before one of the upstream end times GE1', and "the departure end time GE2' is earlier than the other upstream start time GS1", it will occur "When the vehicle H should be started by the upstream number 13a, the upstream The sign 13a is not in the green time period Ga, so that the vehicle H has to temporarily stay at the setting of the upstream sign 13a, and when the vehicle H passes the upstream sign 13a and travels to the downstream sign 13b, the The downstream number 13b is not between the green time period Gb, so that the vehicle H cannot pass through the downstream number 13b smoothly, but must stay at the setting of the downstream number 13b. Therefore, the processing unit 11 determines that the pass opportunity of the downstream tag 13b is "not present", and thus generates information for notifying the driver, for example, the processing unit 11 sends an electrical signal to the upstream tag 13a to make the upstream number. Zhi 13a does not display any visually pleasing content, or displays the light color, pattern, etc. that cannot pass through the downstream number 13b, so that the driver of the vehicle H can pass the upstream number 13a. Diverted to avoid the vehicle H being placed in the downstream sign 13b, which affects the driving behavior of the driver. On the other hand, if "the departure start time GS2" is earlier than the upstream end time GS1" or "the departure end time GE2 is later than the upstream start time GS1", one of the conditions is satisfied, the processing unit 11 determines that "the vehicle H must The time period from the upstream number 13a is "between the green time period Ga of the upstream number 13a", as explained later.

Please refer to FIG. 4a, which is a schematic diagram (1) of the passage of the downstream sign 13b of the present invention, wherein the condition "the departure start time GS2' is earlier than the upstream end time GE1" is established. "The period in which the vehicle H must be departed from the upstream number 13a" is between "the green time period Ga of the upstream number 13a" so that the vehicle H can pass between the departure start time GS2' and the upstream end time GE1. The upstream number 13a travels through the downstream number 13b at the reference rate V.

Please refer to FIG. 4b, which is a schematic diagram of the pass opportunity of the downstream sign 13b of the present invention. (2), wherein the condition "the departure end time GE2 is later than the upstream start time GS1" is established, therefore, "The period in which the vehicle H must be departed from the upstream number 13a" is between "the green time period Ga of the upstream number 13a" so that the vehicle H can pass between the upstream start time GS1 and the departure end time GE2' The upstream number 13a travels through the downstream number 13b at the reference rate V. The processing unit 11 determines that the passage opportunity "present" of the downstream token 13b. Next, the passage time calculation step S4 is performed.

Referring to FIGS. 1 to 3 again, the pass time calculation step S4 is performed by the processing unit 11 taking the maximum value of the upstream start time GS1 and the departure start time GS2' as a pass start time, and taking The upper The minimum value of both the cruise end time GE1 and the departure end time GE2' is used as the first end time, and the upstream information 13a indicates the information of the driving. The processing unit 11 may further obtain the pass duration by subtracting the pass start time from the end time. In detail, if the pass opportunity of the downstream sign 13b is "present", the processing unit 11 further compares the upstream start time GS1 and the departure start time GS2', and takes the upstream start time GS1 and the departure. The maximum value of the start time GS2' is taken as the start time of the passage, as shown in the following formula (4): ps=Max{gs1, gs2'} (4) where ps is the start time of the pass; gs1 is the start time of the upstream GS1; gs2' is the departure start time GS2'.

Then, the processing unit 11 compares the upstream end time GE1 and the departure end time GE2', and takes the minimum value of the upstream end time GE1 and the departure end time GE2' as the end time, as follows: ): pe = Min{ge1, ge2'} (5) where pe is the end time of the passage; ge1 is the upstream end time GE1; ge2' is the departure end time GE2'. Moreover, the processing unit 11 may also subtract the pass start time from the end time to obtain the pass duration. As shown in the following equation (6): pc=pe-ps (6) where pc is the transit duration; pe is the transit end time; ps is the transit start time.

Therefore, the processing unit 11 can generate information for indicating driving of the driver during the duration of the passage, for example, the electric power is transmitted by the processing unit 11. a signal to the upstream number 13a, such that the upstream number 13a displays information such as the color of the downstream number 13b, the pattern, the reference rate V, or a combination thereof, for indicating the driver's driving, for the driver to Driving reference so that you can reach your destination as soon as possible.

For example, as shown in FIG. 5, it is a time-space correlation diagram of the use case of the preferred embodiment of the driving indication method of the present invention, wherein the group period C of the upstream number 13a and the downstream number 13b is 100 seconds; the symbol spacing D is 250 meters, the reference rate V is 12.5 meters / sec; the upstream start time GS1 and the upstream end time GE1 of the green time period Ga of the upstream number 13a are 0th second and 60 seconds; the downstream start time GS1 and the downstream end time GE2 of the green light period Gb of the downstream number 13b are 40 seconds and 90 seconds respectively; therefore, according to the above formula (1), the processing unit 11 can be separated by the number D And the reference rate V calculates the driving time T as 20 seconds, as shown in the following formula (7a): Then, according to the above formulas (2) and (3), the processing unit 11 can calculate the departure start time GS2' and the departure end time GE2' as the 20th second and the 60th second, respectively, as follows (7b) and ( 7c): rs2=gs2-t=40-20=20 (7b) re2=ge2-t=90-20=70 (7c) wherein, since the departure start time GS2' occurs at the 20th second, the upstream The end time GE1 occurs in the 60th second, so the departure start time GS2' is earlier than the upstream end time GE1; moreover, the departure end time GE2' occurs in the 70th second, and the upstream start time GS1 occurs in the 0th second. The departure end time GE2' is later than the upstream start time GS1. Therefore, the condition that the departure start time GS2 is later than the upstream end time GE1 is not satisfied, and the condition that the departure end time GE2 is earlier than the upstream start time GS1 is not satisfied, the processing unit 11 determines that "there is a presence" of the downstream number. The opportunity for the passage of Zhi 13b, that is, "the vehicle H has the opportunity to pass the downstream sign 13b in time."

Then, according to the above formulas (4) and (5), the processing unit 11 can calculate the pass start time, the pass end time, and the pass duration are 20th, 60th, and 40th, respectively, as shown in the following formula (7d), (7e) and (7f): ps=Max{gs1, gs2'}=Max{0,20}=20 (7d) pe=Min{ge1,ge2'}=Min{60,70}=60 ( 7e) pc=pe-ps=60-20=40 (7f) wherein, since the vehicle H has a chance to encounter the green light of the downstream sign 13b, it will be 20 seconds after the green light of the upstream note 13a is turned on. Start and end after 40 seconds. Therefore, if the vehicle H travels at a rate of 12.5 meters per second and passes the upstream number 13a within 40 seconds after the start of the green light of the upstream symbol 13a, the downstream number 13a will pass through the downstream number. 13b.

The main features of the driving indication method disclosed by the present invention are as follows: the processing unit 11 first obtains the number of the dial spacing D and the reference rate V from the database 12, and to the upstream number. The upstream start time GS1 and the upstream end time GE1 are obtained, and the downstream start time GS2 and the downstream end time GE2 are obtained from the downstream note 13b. Then, the processing unit 11 according to the mark interval D and The reference The test time V calculates the travel time T, and then calculates the departure start time GS2' according to the downstream start time GS2 and the travel time T, and calculates the departure end time GE2' according to the downstream end time GE2 and the travel time T; And determining, by the processing unit 11, whether the departure start time GS2' is later than the upstream end time GS1, and whether the departure end time GE2' is earlier than the upstream start time GS1, and if the determination result is "Yes", Then, it is determined that the pass opportunity of the downstream message 13b is "not present"; otherwise, the pass opportunity of the downstream note 13b is determined to be "present", and the maximum value of the upstream start time GS1 and the departure start time GS2' is taken. As a pass start time, the minimum value of both the upstream end time GE1 and the departure end time GE2' is taken as a pass end time. Moreover, it is also possible to subtract the pass start time from the end time to obtain the pass duration.

Therefore, before the vehicle H passes the upstream number 13a, the processing unit 11 can estimate the pass start time, the pass end time, and the pass duration, during which the processing unit 11 can send a signal to the The upstream number 13a or the driving navigation device in the vehicle H can remind the driver of the equipment for the driver to use as a driving reference. In other words, the driver can know whether the vehicle H can pass the intersection where the downstream number 13b is located at the predetermined rate V when the vehicle H continues to travel. If the downstream intersection 13b cannot be passed in time, the driver can be redirected in advance to avoid being blocked. At the intersection where the downstream number 13b is located, there are driving behaviors such as rushing to reduce the risk of traffic accidents and effectively increasing the road utilization rate, which is the effect of the present invention.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and those skilled in the art can The scope of the present invention is to be construed as being limited by the scope of the appended claims.

〔this invention〕

1‧‧‧Driving Instruction System

11‧‧‧Processing unit

12‧‧‧Database

13‧‧‧Traffic number

13a‧‧‧Upstream

13b‧‧‧Downstream

C‧‧‧ group cycle

D‧‧‧# spacing

F‧‧‧ hour difference

H‧‧‧Vehicle

R‧‧‧ Driving directions

T‧‧‧Driving time

V‧‧‧ reference rate

Ga, Gb‧‧‧Green time

GS1‧‧‧ upstream start time

GE1‧‧‧ upstream end time

GS2‧‧‧ downstream start time

GE2‧‧‧ downstream end time

GS2’‧‧‧ departure start time

GE2’‧‧‧ End of departure time

S1‧‧‧Preparation steps

S2‧‧‧ departure time calculation steps

S3‧‧‧ opportunity judgment step

S4‧‧‧Through time calculation steps

Fig. 1 is a system architecture diagram of a preferred embodiment of the driving indication method of the present invention.

Figure 2 is a flow chart showing the operation of the preferred embodiment of the driving indication method of the present invention.

Figure 3 is a time-space correlation diagram of a preferred embodiment of the driving indication method of the present invention.

Figure 4a: Schematic diagram of the pass opportunity of the downstream sign of the present invention (1).

Figure 4b: Schematic diagram of the pass opportunity of the downstream sign of the present invention (2).

Figure 5 is a time-space correlation diagram of the use case of the preferred embodiment of the driving indication method of the present invention.

S1‧‧‧Preparation steps

S2‧‧‧ departure time calculation steps

S3‧‧‧ opportunity judgment step

S4‧‧‧Through time calculation steps

Claims (7)

A driving instruction method includes: a preparation step of obtaining a first interval and a reference rate from a processing unit to a database, and obtaining an upstream start time and an upstream end time from an upstream directory, and then A downstream sign obtains a downstream start time and a downstream end time; a departure time calculation step is performed by the processing unit according to the mark interval and the reference rate, and then according to the downstream start time and the travel time Calculating a departure start time, and calculating a departure end time according to the downstream end time and the travel time; and determining, by the processing unit, whether the departure start time is later than the upstream end time, and the departure Whether the end time is earlier than the upstream start time, if the above judgment result is yes, it is determined that the pass opportunity of the downstream log does not exist, otherwise, a pass time calculation step is performed; and the pass time calculation step is performed by the processing unit Taking the maximum value of the upstream start time and the departure start time as one Time, to take the upstream end and the departure time and the end time as a minimum sum of both by the end time as the semaphore upstream traffic indication information. For example, the driving instruction method described in claim 1 of the patent scope, wherein the driving time is calculated as follows: Where t is the travel time, d is the distance of the mark, and v is the reference rate. The driving indication method according to claim 1, wherein the departure start time is calculated as follows: gs2'=gs2-t, wherein gs2' is the departure start time, and gs2 is the downstream start time , t is the driving time. The driving instruction method according to claim 1, wherein the departure end time is calculated as follows: ge2'=ge2-t, wherein ge2' is the departure end time, and gs2 is the downstream start time , t is the driving time. The driving instruction method according to claim 1, wherein the passing start time is calculated as follows: ps=Max{gs1, gs2'}, wherein ps is the passing start time, and gs1 is the upstream The start time, gs2' is the departure start time. The driving instruction method according to claim 1, wherein the passing end time is calculated as follows: pe=Min{ge1,ge2'}, wherein pe is the passing end time, and ge1 is the upstream At the end time, ge2' is the departure end time. The driving instruction method according to claim 1, wherein the passing time calculating step is further obtained by the processing unit subtracting the passing start time from the ending time to obtain a passing duration, as shown in the following formula: Pc=pe-ps, where pc is the pass duration, Pe is the pass end time, and ps is the pass start time.