JP6040761B2 - Speed regulation support system and speed regulation support method - Google Patents

Description

  The present invention relates to a speed regulation support system and a speed regulation support method for eliminating / relaxing a traffic jam assumed when passing through a traffic regulation section on a road where traffic regulation is performed.

  In general, a user of a road such as an expressway can use traffic regulation information for notifying that there is a traffic regulation section on the road. Traffic regulation information such as lane regulation information is notified to the user via, for example, a variable information board device on a highway or a highway radio device.

  On roads that are subject to lane restrictions, traffic lanes often occur because the lanes that can pass in the lane restriction section are restricted. As a method for relieving or alleviating the traffic congestion, it is possible for a road user to understand the content of the lane regulation information and drive while gradually decreasing the speed before reaching the lane regulation section. However, since it is up to the user to adjust the travel speed of the vehicle, it is difficult to eliminate or alleviate the traffic congestion on the entire road having the lane restriction section.

  On the road, there is a speed limit sign for notifying the user of the road of the speed limit of the currently traveling road. The speed limit sign displays the maximum speed allowed on the road. In addition, a variable speed regulation sign that can change the speed to be displayed in response to the fluctuation of the speed limit is used on the road where the speed limit fluctuates according to the situation. In the variable speed regulation sign, control is performed to display the speed as specified by the administrator who inputs the speed limit or regulation speed of the road.

  The speed displayed on the speed limit sign or variable speed regulation sign provided on the road is set by the road manager. The normal speed limit is set to a fixed value below the legal speed. When temporarily changing the speed limit displayed on the variable speed regulation sign, it is only necessary to display the speed limit set for each section by the road administrator, and the display speed is dynamically adapted to the vehicle situation. The current situation is that the system does not change.

  Moreover, the following can be mentioned as a factor of the traffic congestion accompanying a lane regulation.

  The first factor is the occurrence of a vehicle that does not reduce the speed until the lane restriction section. This occurs because there is no information on how fast the vehicle should travel with the lane regulation information alone, and the user of the highway has no choice but to control the vehicle speed.

  The second factor is that it is necessary to apply a brake in the lane restriction section, excessive speed restriction is performed, or sufficient speed restriction cannot be performed and appropriate speed control is not performed. This occurs because, when the administrator performs display control of the variable speed restriction sign device for the first factor, the restriction speed does not take into account the relationship between the traffic volume and the number of restricted lanes.

  The third factor is to cause a rapid speed decrease by approaching the lane restriction section and increase the number of times of braking of the following vehicle. This is because when the administrator performs display control of the variable speed restriction sign device, the variable speed restriction sign device positioned upstream from the lane restriction section has a speed depending on the distance between the lane restriction section and the vehicle. This happens because we don't consider controls that change.

  Patent Document 1 discloses a system for suppressing traffic congestion that enables suppression of traffic congestion.

  The system of Patent Document 1 is realized by the light emitting device 111 of FIG. The light emitting devices 111 are installed at equal intervals on the center line 181 of the highway 108 and communicate with other adjacent light emitting devices 111. Each light emitting device 111 starts and stops light emission in conjunction with each other. As a result, the light emitted by the plurality of light emitting devices 111 appears to move at a constant interval and speed as a whole. The driver of each vehicle 109 traveling on the highway 108 adjusts the speed so that the distance between the vehicle and the vehicle traveling ahead matches the light interval, and the traveling speed matches the light moving speed. Drive while. Accordingly, the inter-vehicle distance and the traveling speed of the entire vehicle traveling on the highway 108 are guided to those desirable from the viewpoint of suppressing traffic congestion, and as a result, suppression of traffic congestion is realized.

JP 2012-108605 A

  When lane control is performed on a road such as an expressway, the traffic density increases and the vehicle speed decreases within the lane control section. As a result, a difference occurs between the vehicle speeds outside the lane restriction section and inside the lane restriction section. Subsequent vehicles attempting to enter the lane restriction zone from outside the lane restriction zone will brake and reduce the speed immediately before entering the traffic jam area near the lane restriction zone, so the entire road including the lane restriction zone There is a problem that a traffic jam will occur.

  According to the system of Patent Document 1, although it is possible for each vehicle to travel at a constant interval and speed, it is difficult to perform driving following light traveling at the same speed as the vehicle. There are challenges.

  In the traffic regulation of a road such as an expressway, the present invention sets an appropriate traveling speed in advance so as to reduce a sudden speed reduction that causes a traffic jam for a vehicle passing on a road including a traffic regulation section. An object is to provide a speed regulation support system to notify.

  The speed regulation support system according to the present invention is a traffic volume measuring device that acquires the traffic information of a road and measures the vehicle length and occupancy rate of the vehicle that passes through the road, and the regulation speed that is set according to the section through which the vehicle passes. A speed regulation support device that performs control to notify the traffic regulation, and the speed regulation support device uses the assumed traffic density calculated based on the vehicle length and the occupancy obtained from the traffic volume measurement device to control traffic after traffic regulation. The assumed vehicle speed in the section is calculated, and the restriction speed that changes stepwise before and after the traffic restriction section on the road including the traffic restriction section is determined based on the assumed vehicle speed.

  In the speed regulation support method of the present invention, the vehicle length and occupancy rate of a vehicle passing through the road are obtained by acquiring road traffic information, and traffic is calculated using the assumed traffic density calculated based on the vehicle length and occupancy rate. Calculate the estimated vehicle speed in the traffic regulation section after regulation, and determine the regulation speed that changes stepwise before and after the traffic regulation section on the road that includes the traffic regulation section based on the assumed vehicle speed. The control which notifies the regulation speed set according to it is performed.

  According to the speed regulation support system of the present invention, in the traffic regulation of a road such as an expressway, so as to reduce the rapid speed reduction of the vehicle that causes a traffic jam with respect to the vehicle passing on the traffic regulated route. It is possible to notify the appropriate vehicle speed in advance.

It is a block diagram of a speed regulation support system according to an embodiment of the present invention. It is a figure showing an example of a speed regulation support system concerning an embodiment of the present invention. It is a block diagram which shows the detail of the internal structure of the speed regulation assistance system which concerns on embodiment of this invention. It is an example of the information table which concerns on embodiment of this invention. It is a figure which shows an example of the traffic regulation zone which concerns on embodiment of this invention. It is a figure for demonstrating the occupation rate of each lane which concerns on embodiment of this invention. It is a figure for demonstrating calculation of the assumption vehicle speed which concerns on embodiment of this invention. It is an information table which concerns on Example 1 of this invention. It is an information table which concerns on Example 2 of this invention. It is an information table which concerns on Example 3 of this invention. It is a figure for demonstrating the traffic jam suppression system which concerns on embodiment of patent document 1. FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the preferred embodiments described below are technically preferable for carrying out the present invention, but the scope of the invention is not limited to the following.

(Embodiment)
FIG. 1 is a diagram showing an outline of a speed regulation support system 10 according to an embodiment of the present invention. The speed regulation support system 10 according to the embodiment of the present invention shown in FIG. 1 has an optimum traveling speed for a vehicle on which a user of the road 9 rides when traffic regulation is performed on a road 9 such as an expressway. Notify users and reduce the factors that cause them to get involved in traffic jams. As a result, the traffic jam occurring on the road 9 is eliminated / mitigated.

  The traffic regulation information is a general term for regulation information performed on the road 9 and includes, for example, lane regulation information, speed regulation information, and road closures. The lane regulation information included in the traffic regulation information includes travel lane regulation, overtaking lane regulation, uphill lane regulation, shoulder lane regulation, island lane regulation, and the like. However, the traffic regulation according to the embodiment of the present invention is not limited to the above-described regulation information, and the traffic regulation according to the embodiment of the present invention is applicable as long as the traveling speed of the vehicle traveling on the road 9 is regulated in some form. Included in the scope of traffic regulation.

  The speed regulation support system 10 in FIG. 1 includes a speed regulation support device 1, a traffic volume measurement device 2, a lane regulation input device 3, a vehicle detection device 4, and a speed regulation notification device 5.

  When traffic regulation such as lane regulation is performed on the road 9, the speed regulation support system 10 changes the traveling speed for the user of the vehicle traveling on the road 9 before reaching the traffic regulation section. Prompt. This is a system that eliminates or alleviates traffic congestion that may occur in traffic regulation sections.

  As for the change in travel speed, it is assumed that it will be reduced before reaching the traffic regulation zone. However, if the traffic regulation is canceled before the user reaches the traffic regulation zone, the normal legal regulations will be applied. The user may be notified that the vehicle is traveling at a speed. In addition, after the vehicle has exited the traffic regulation section, a notification may be given so as to gradually increase the speed in order to urge the vehicle to shift to the normal traveling speed.

  FIG. 2 is a diagram showing the speed regulation support system 10 according to the embodiment of the present invention in a form including devices on the road 9. The variable speed regulation signs 7 (7-1 to 7-N) and the vehicle detector 8 (8-1 to 8-N) in FIG. 2 correspond to the speed regulation notification device 5 and the vehicle detection device 4 in FIG. 1, respectively. To do. The speed regulation support device 1, the traffic volume measuring device 2, and the lane regulation input device 3 in FIG. 2 are the same as those in FIG.

  In order to cope with temporary traffic restrictions such as construction, accident handling, and roadside maintenance, the variable speed regulation sign 7 and the vehicle detector 8 shown in FIG. 2 are preferably movable. However, it may be installed on the road 9 in order to cope with traffic regulations performed on a daily basis.

  In FIG. 2, the variable speed regulation support systems 7 (7-1 to 7-N) and the vehicle detectors 8 (8-1 to 8-N) are connected to each other by signal lines. The variable speed regulation support system 7 (7-1 to 7-N) is connected to the speed regulation support device 1.

  The vehicle detector 8 (8-1 to 8-N) is connected to the traffic volume measuring device 2. It is preferable that the vehicle detector 8 (8-1 to 8-N) is installed so that the traffic volume of each lane divided by the lane boundary line 91 can be measured.

  FIG. 3 is a diagram showing details of the speed regulation support system 10 according to the embodiment of the present invention.

  The speed regulation support device 1 controls the speed regulation notification device 5 based on the data received from the lane regulation input device 3 and the traffic volume measuring device 2.

  As shown in FIG. 3, the speed regulation support device 1 includes a storage unit 11, a processing unit 13, a determination unit 15, and a control unit 17.

  The storage unit 11 stores an information table 40 as shown in FIG. Although specific numerical values are not shown in the information table 40 of FIG. 4, it is assumed that numerical values are registered in advance in the initial information portion.

  Here, the initial information includes route information, block number, block direction information, block range (kp) where traffic is restricted, legal speed in the block, number of lanes in the block, and saturated traffic density in the block. Each is described. In addition, suppose that a block shows the area on the road formed by dividing the road 9 along the width direction.

  Here, the route information indicates which road information, for example, if it is an expressway, it indicates which route it is. The block number is a number assigned to a divided section when the speed regulation sign device on the route is divided into controllable unit sections. The direction information is information indicating whether the block is an up, down, inward, or outward route on the route. Even on the same route, it is independent depending on the direction.

  The parameters included in these initial information are set by an administrator who performs work such as construction involving traffic regulation. In addition, when the subject that regulates traffic and the subject that manages the road do not match, it is preferable to set the authority of traffic regulation management to any subject.

The processing unit 13 refers to the occupation rate _OL and the average vehicle length l stored in the information table 40 of the storage unit 11 for the block described in the lane regulation time of the information table 40, that is, the block that performs lane regulation. An assumed vehicle speed V _s after speed regulation is calculated. The occupation rate _OL and the average vehicle length l will be described later. Further, the processing unit 13 records the assumed average speed V _s in the information table 40 stored in the storage unit 11.

The determination unit 15 refers to the assumed average speed V _s of the information table 40, determines the control speed V _r of each speed control block, and stores the control speed V _r in the storage unit 11.

Control unit 17, in front of the traffic regulation time, the speed limit notification device 5 installed in each block, and controls to display the speed limit V _r stored in the storage unit 11. Further, when the regulation speed V _r is changed, control is performed so that the changed regulation speed V _r is displayed. Further, at the end of the lane restriction, control is performed so that the display of the speed restriction notification device 5 is extinguished or the normal traveling speed is displayed.

  The traffic measuring device 2 includes an interface 21 (21-1 to 21-N) that exchanges data with the vehicle detector 8 installed on the road 9, and a processing unit 22 that averages collected data. .

The traffic volume measuring device 2 measures the occupancy rate _OL and the average vehicle length l of each lane described later, and transmits these measured values to the speed regulation support device 1. The occupation rate _OL and the average vehicle length l are stored in the storage unit 11 of the speed regulation support device 1. In addition, the traffic volume measuring device 2 itself may have the function of the vehicle detection device 4, and in that case, a configuration may be adopted in which a detection unit 41 described later is incorporated.

  The lane regulation input device 3 is installed, for example, in a facility that controls traffic on the road 9. The function of the lane regulation input device 3 may be imposed on an emergency operation device (not shown) installed on the side of the road 9.

  The lane regulation input device 3 includes an input device 31 such as a keyboard for inputting each item of the information table 40 shown in FIG. 4 and an output device 32 such as a display device and a printing device for displaying and outputting necessary information. The configuration is shown in FIG.

  The administrator of the road 9 can grasp the current state of the road 9 through the output device 32 and input data to be registered in the information table 40 with the input device 31. The input data is transmitted to the speed regulation support device 1 and stored in the storage unit 11 of the speed regulation support device 1.

  The vehicle detection device 4 includes a plurality of detection units 41 (41-1 to 41-N), and is installed on the road 9 like the vehicle detector 8 of FIG. The plurality of vehicle detectors 8 (8-1 to 8-N) are provided with detection units 41 (41-1 to 41-N), respectively. Each detection unit 41 (41-1 to 41-N) is connected to the processing unit 22 via the corresponding interface 21 (21-1 to 21-N). The vehicle detection device 4 may be built in the traffic measurement device 2 or the interface 21 may be omitted as a configuration in which all the detection units 41 are directly connected to the processing unit 22. In FIG. 2, the vehicle detector 8 is depicted as being installed on the road surface. However, the vehicle detector 8 may be erected on the side of the road 9 and may not necessarily be installed on the road surface.

  As the vehicle detection device 4, for example, a device that detects that a vehicle has passed based on information sensed by a sound wave sensor, an ultrasonic sensor, a pressure sensor, or the like incorporated in the detection unit 41 can be applied. It also has a light emitting source such as infrared rays, an electromagnetic wave generating source such as microwaves and millimeter waves, etc., and has a light emitting / receiving portion (transmitting / receiving portion), and a vehicle passing between the light emitting portion and the light receiving portion. A device for detection can also be applied. Furthermore, image information from an optical camera may be used. Thus, as a sensor incorporated in the detection unit 41 of the vehicle detection device 4, it is only necessary to detect at least the passage of the vehicle. Furthermore, it is preferable that data for calculating the average vehicle length l of the vehicle in progress toward the block having the traffic regulation zone can be acquired by detecting the length of each vehicle.

  The vehicle detection information is processed by the traffic measuring device 2 and then sent to the manager's speed regulation input device 3. The administrator can read data sent from the vehicle detection device 4 with the output device 32 of the lane restriction input device 3 and input information and instructions to the input device 31 of the lane restriction input device 3 according to the situation. In addition, data before the data processing by the traffic measuring device 2 may be transmitted to the speed regulation input device 3.

  The speed regulation notifying device 5 provides speed regulation information, which is the optimum traveling speed in the block on which the user of the road 9 is passing, to the user of the road 9 like the variable speed regulation display device 7 of FIG. Notice. The provision of the speed regulation information is not limited to equipment such as the variable speed regulation display device 7, but may be information board equipment, highway radio equipment, or the like. Moreover, it is good also as a structure which provides a speed regulation receiving apparatus (not shown) in each vehicle, and notifies speed regulation information to a user through the image display part and audio | voice notification part (not shown) provided in each vehicle.

  The speed regulation notification device 5 includes a plurality of notification units 51 and can display different speed regulation information for each. However, the speed regulation information does not need to be different for all the notification units 51, and may be the same speed regulation information depending on the situation. Moreover, in FIG. 3, although the number of the notification parts 51 and the detection parts 41 is described as the same N piece, each does not need to be the same number and may differ. Moreover, it is preferable that the speed regulation notification device 5 is installed for each of the above-described blocks.

  The speed regulation notification device 5 displays the regulation speed for at least a period from the time when traffic regulation starts to the time when it ends. Moreover, it is preferable to start displaying the regulation speed before the traffic regulation is started.

  The above is the description of the configuration of the speed regulation support system according to the embodiment of the present invention. Note that the scope of the speed regulation support system of the present invention is not limited to the above description, and includes those in which various modifications and additions are made to the above description.

(Assumed vehicle speed)
With reference to FIGS. 5-7, describing calculation of the assumed vehicle speed V _s. Note that the assumed vehicle speed V _s assumes a speed at which a vehicle traveling toward the traffic regulation section travels in the vehicle traffic regulation section. The following assumed vehicle speed V _s is calculated based on the traveling vehicle information on the current road 9.

  FIG. 5 is a diagram illustrating an example of a traffic regulation zone 90 on the road 9.

  The following calculation of the assumed vehicle speed is executed by the processing unit 13 inside the speed regulation support apparatus 1 shown in FIG.

  In FIG. 5, the case where only one lane (lane 9-1) of the two-lane road 9 is the traffic regulation zone 90, that is, the case where the number L of regulation lanes is 1 will be described. In addition, lane 1 (lane 9-1), lane 2 (lane 9-2), and so on are named in order from the lane farthest from the central lane.

The time T during which the lane restriction is performed is obtained using Expression 1 from the restriction start time T _s (YY / MM / DD HH: MM) and the restriction end time _Te (YY / MM / DD HH: MM).

T = T _e −T _s (1)
The distance D, which is the length of the traffic regulation section where lane regulation is performed, is obtained by Expression 2 using the regulation start point a (kp) and the regulation end point b (kp).

D = | a−b | (2)
Here, on the road 9, a section between the regulation start point a and the regulation end point b is referred to as a traffic regulation section 92.

  In addition, kp shown as a unit of a regulation start point and a regulation end point is a unit called a kilo post, and shows a distance from a specific starting point on the road 9. In general, post (p) corresponds to meter (m). In Expression 2, the values of the restriction start point a and the restriction end point b are uniquely determined with respect to a specific starting point on the road 9. Since the restriction start point a and the restriction end point b are determined relative to a specific starting point, an absolute value is obtained as in Expression 2 in order to make the distance D a positive value.

Next, a description will be given occupancy O _L of each lane in the traffic control section 92 with reference to FIG. L is a lane number. FIG. 6 is a diagram for explaining the occupation ratio indicating the ratio of the traffic regulation zone 90 in the traffic zone of the road 9.

The occupation rate _OL is a ratio of the vehicle occupying each lane in the traffic regulation section 92. The occupancy rate includes a time occupancy rate and a space occupancy rate depending on the measurement method. The time occupancy rate is the percentage of the measurement time of the time the vehicle occupies on a certain road section, and the space occupancy rate is the percentage of the total length of the vehicle existing on a certain length road section at a certain moment in the section length. Show.

  In the lane 1, the portion (92-1) surrounded by the thick line of the lane 1 in FIG. A portion (92-1) surrounded by a thick line of the lane 1 in FIG. In lane 2, the portion (92-2) surrounded by the thick line of lane 2 in FIG. In FIG. 6, the lane boundary line 91 is illustrated as being excluded from the occupied area, but it is divided at the center of the lane boundary line 91, or a position on the lane boundary line 91 is assigned as any occupied area. May be.

Here, occupancy O _L of each lane, in the region of the regulating end point b and regulatory starting a, O ₁ (%) in lane 1, and is in lane ₂ O 2 (%). The occupation rate _OL is calculated by the traffic measuring device 2 from the observation value of the vehicle detection device 4. Here, the occupancy rate _OL may be either a time occupancy rate or a space occupancy rate, and is data whose value is periodically transmitted from the traffic volume measuring device 2.

Further, the assumed vehicle speed V _S in the traffic regulation section 92 is calculated using the assumed traffic density k _S in the traffic regulation section 92 after regulation. The traffic density is the number of vehicles existing on a unit section of the road at a certain moment. Since it is difficult to actually measure the traffic density, the traffic density is calculated using the occupation rate.

In calculating the assumed vehicle speed V _S, the saturated traffic density k _j (vehicle / km) indicating the number of vehicles that can exist on a unit section of the road at a certain moment, legal speed V _f (km / hour), average The vehicle length l (m) is a fixed value.

First, the traffic density k _L of the lane L is obtained from Equation 3.

k _L = _OL / (100 × l) (3)
That is, the traffic densities k ₁ and k ₂ of the lanes 1 and 2 are obtained from equations 4 and 5, respectively.

k ₁ = O ₁ / (100 × l) (4)
k ₂ = O ₂ / (100 × l) (5)
Therefore, the assumed traffic density k _S after lane regulation is obtained from Equation 6.

k _S = k ₁ + k ₂ = (O ₁ + O ₂ ) / (100 × l) (6)
The estimated vehicle speed V _{S in} the traffic regulation section 92 after regulation is obtained from the following observation formula (Greenshields formula) using the assumed traffic density k _S after regulation (reference: Shogo Kawakami, Matsui) Hiroshi, “Traffic Engineering (Second Edition)”, Morikita Publishing, 2004, p. 105-106).

V _S = V _f × (1−k _S / k _j ) (7)
The free speed was the legal speed _Vf .

As described above, the assumed vehicle speed V _S is obtained. The calculated assumed vehicle speed V _S is stored in the storage unit 11. In addition, as for the expression 7, an expression in which various correction coefficients are introduced according to the type of road to be verified may be substituted. Further, when determining the assumed vehicle speed V _S , Greenberg's equation, Underwood's equation, Drake's equation, Drew's equation, and the like may be used instead of the Greenshields equation.

(Determination of regulation speed)
Next, the determining unit 15 of the speed regulation support device 1 determines the regulation speed V _r of each speed regulation block using the calculated assumed vehicle speed V _S.

The regulation speed V _r is determined as follows in each block shown in FIG. 7, for example. FIG. 7 is a diagram for explaining that the road having the traffic regulation section 92 is divided into a plurality of blocks and the regulation speed V _r in each block is set. In the following description, the speed is decreased by 10 km / hour as the traffic regulation section 92 is approached. The speed reduction rate may be set in consideration of the traffic density and the number of lanes.

First, in the block including the traffic regulation zone 90 (blocks 1 to 3), the assumed vehicle speed V _S is set as the regulation speed V _r .

Also in the block 4 immediately before the traffic regulation section 92, the assumed vehicle speed V _S is set as the regulation speed V _r .

In subsequent blocks, the regulation speed _Vr is increased in units of 10 km / hour. Here, the Block 5 V _S + 10km / hour, at block 6 V _S + 20km / hour, in block 7 V _S + 30km / hour. It should be noted that in block 8 and subsequent blocks (not shown), the speed may be increased similarly as long as the legal speed _Vf is not exceeded.

That is, the vehicle speed is set to decrease stepwise as the vehicle approaches the traffic regulation section 92 including the traffic regulation zone 90. In the traffic regulation section 92, when the regulation speed V _r becomes 0 or becomes a speed corresponding to a traffic jam, the speed change amount may be designated as a speed other than 10 km. For example, the rate of change can be reduced in a block close to the traffic regulation section 92, and the amount of change can be increased in a block far from the traffic regulation section 92. Further, the restriction speed V _r of the traffic restriction section 92 may be set to a few blocks before the traffic restriction section 92 so that the restriction speed V _r is not lowered immediately before the traffic restriction section 92.

The control speed V _r determined in this way is transmitted by the control unit 17 to the notification unit 51 belonging to a predetermined speed control block of the speed control notification device 5.

The transmitted regulated speed V _r is notified to the user of the road 9 by the notification unit 51. For example, the notification unit 51 may be a display device that can display the regulated speed V _r , or may be a device that notifies by voice. Alternatively, the speed regulation notification device 5 may be mounted on a vehicle, and the regulation speed V _r may be notified to the user by a notification unit 51 provided in the vehicle.

The user of the road 9 may set the vehicle speed according to the notified regulated speed _Vr .

The vehicle speed setting can be adjusted by the driver of the vehicle on which the user of the road 9 rides, but can be automatically controlled. For example, if it is possible to automatically control only the vehicle speed and the driver can operate the steering wheel, the regulation speed V _r is notified to a display device (not shown) provided in each vehicle so that the congestion is eliminated / mitigated. Can be controlled to speed. If the opening / closing state of the accelerator of the vehicle is automatically controlled, it can be controlled to a predetermined regulation speed V _r . If such an automatic control system is incorporated in all the vehicles traveling on the road 9, an error caused by the judgment of the driver can be reduced, and it is possible to further eliminate / mitigate a traffic jam.

  In addition, after the vehicle passes through the traffic regulation zone 92, the vehicle may be driven at a normal legal speed according to the judgment of the vehicle user. However, it is not always safe to continue driving at low speed even after exiting a traffic jam, so depending on the situation, even after the vehicle exits the traffic regulation section, the regulation speed is notified to return to the legal speed. You may keep doing. In that case, what is necessary is just to determine so that a regulation speed may be enlarged in steps as it leaves | separates from the traffic regulation zone 92.

  As described above, according to the speed regulation support system according to the embodiment of the present invention, the vehicle speed from the section located upstream from the speed regulation section so that the speed is assumed in advance from the lane regulation start time. Control to drop gradually. Therefore, according to the speed regulation support system according to the embodiment of the present invention, it is possible to dynamically control the speed regulation sign device only by registering planned lane regulation information due to construction or the like, which is one of the causes of congestion. It is possible to reduce the brake operation.

  According to the speed regulation support system of the embodiment of the present invention, speed regulation can be performed from the relationship between lane regulation information and traffic volume. It is possible to provide speed regulation information by connecting not only equipment such as a variable speed regulation display device but also information board equipment, highway radio equipment, and the like to the speed regulation support device.

  The system of Patent Document 1 aims to increase the traffic volume in a certain section. However, from the viewpoint of maximizing the traffic volume in a certain section, it is not always possible to eliminate traffic jams in situations where merging is required again, such as junctions and interchanges.

  On the other hand, according to the speed regulation support system according to the embodiment of the present invention, it is an object to realize congestion reduction by reducing the number of brakes caused by a speed difference generated with a change in traffic capacity. Therefore, it can be applied as a means for eliminating traffic jams such as junctions and interchanges.

  Further, according to the system of Patent Document 1, a message that increases the speed toward the traffic regulation section may be issued. However, in the system according to the embodiment of the present invention, the message for increasing the speed is not notified at least when the vehicle is moving toward the traffic regulation section. This is because on highways, safety is given priority over traffic jams, so when heading for a dangerous section, a message prompting the driver to increase speed is often not appropriate from a safety standpoint. In addition, when it passes through a traffic regulation area, since it is necessary to open the inter-vehicle distance with a subsequent vehicle or to return to a normal legal speed, you may give the display which raises a speed as needed.

  As lane restriction information of the speed restriction support system according to the embodiment of the present invention, only general information used for providing information on an information board or a highway radio is required. Therefore, the system according to the embodiment of the present invention has ease of cooperation with an existing traffic control system. The “desirable travel speed” in Patent Document 1 is difficult to obtain because it is necessary to consider which section is desirable. On the other hand, the “assumed speed” calculated by the system according to the embodiment of the present invention can be easily calculated from the traffic volume data and the number of restricted lanes.

Example 1
An example according to the embodiment of the present invention will be described.

  FIG. 8 shows an information table 40-1 according to the first embodiment. The information table 40-1 is stored in the storage unit 11.

In Example 1, the example which regulates the road A of 2 lanes to 1 lane was shown. In the first embodiment, the block 0003 and the block 0004 are defined as restriction sections. Further, the number of restricted lanes is added to the information table 40-1. The saturated traffic density k _j is 100 cars / km.

  First, the information regarding the lane restriction input from the input device 31 of the lane restriction input device 3 in FIG. 3 is recorded in the information table 40-1 stored in the storage unit 11.

  The vehicle detection information acquired by the detection units 41-1 to 4N of the vehicle detection device 4 is subjected to processing such as averaging by the processing unit 22 of the traffic measurement device 2.

  The processing unit 22 calculates the traffic density of each lane. The calculation result is recorded in the information table 40-1 stored in the storage unit 11.

The processing unit 13 of the speed regulation support device 1 refers to the information table 40-1 stored in the storage unit 11, and calculates the assumed vehicle speed V _s in the regulated section after regulation. The calculated estimated vehicle speed V _s is recorded in the information table 40-1 stored in the storage unit 11.

Then, determination unit 15 refers to the information table 40-1 stored in the storage unit 11, determines a speed limit V _r in regulation section. In the first embodiment, 60 km, which is a speed obtained by rounding off the last digit of the assumed vehicle speed V _s , is set as the regulation speed V _r . In the block adjacent to the restriction section, the speed is the same as the restriction speed V _s of the restriction section in order to eliminate the speed change when entering the restriction section.

Moreover, since the determination part 15 reduces speed as it approaches a regulation area, it decelerates regulation speed by 10 km as it approaches a regulation area. In the first embodiment, the speed is reduced by 10 km / hour for each block from the block 0009, and the restriction speed Vr is set to be 60 km / hour in the blocks 0003-0005. It should be noted that a legal speed of 100 km / hour is set as the regulated speed V _r for a portion where no numerical value is entered in the regulated speed V _r of the information table 40-1 in FIG.

The control unit 17 acquires the regulation speed V _r of each block from the storage unit 11 and transmits the regulation speed Vr to the corresponding notification units 51 (notification units 51-1 to 51-N).

Each notification unit 51-1~N displays their regulation speed V _r to the variable speed control display 7-1～N.

  Actually, a simulation was performed according to the information table 40-1. As a result, no traffic jam occurred at the head of the restricted section even after 2 hours had passed. On the other hand, when the speed control as in the present embodiment was not performed, a traffic jam occurred 30 minutes after the start of regulation, and the traffic jam was not eliminated until the regulation ended.

(Example 2)
FIG. 9 shows an information table 40-2 of the second embodiment. In the following description, the same parts as those in the first embodiment are omitted.

  In Example 2, the example which regulates the road B of 3 lanes to 2 lanes was shown. In the second embodiment, the block 0003 and the block 0004 are defined as restriction sections.

Since the process from the input of lane regulation information from the input device 31 to the process of determining the regulation speed V _r in the decision unit 15 is the same as in the first embodiment, the description thereof is omitted.

  In the second embodiment, each block is decelerated by 10 km / hour from the block 0009, and the regulation speed Vr is set to 50 km / hour in the blocks 0003-0005.

As in the first embodiment, the determined restriction speed V _r is displayed on the variable speed restriction display devices 7-1 to N.

  Actually, when a simulation was performed according to the information table 40-2, the occurrence of traffic congestion starting from the restricted section was not seen even after 2 hours had passed. On the other hand, when the speed control as in the present embodiment was not performed, a traffic jam occurred when 60 minutes passed from the start of the regulation, and the traffic jam was not eliminated until the regulation ended.

Example 3
FIG. 10 illustrates an information table 40-3 according to the third embodiment. In the following description, the same parts as those in the first embodiment are omitted.

  In Example 3, the example which regulates the road B of 3 lanes to 1 lane was shown. In the third embodiment, the block 0003 and the block 0004 are defined as restriction sections.

Since the process from the input of lane regulation information from the input device 31 to the process of determining the regulation speed V _r in the decision unit 15 is the same as in the first embodiment, the description thereof is omitted.

In the third embodiment, the block 0009 is decelerated by 10 km / hour for each block, and the restriction speed Vr is set to 40 km / hour in the blocks 0003-0004. Incidentally, regulation speed Vr in regulating section to become 40 km / hour and slow, did not equal the speed limit V _r regulation section and block 0005.

As in the first embodiment, the determined restriction speed V _r is displayed on the variable speed restriction display devices 7-1 to N.

  Actually, when a simulation was performed according to the information table 40-3, the occurrence of a traffic jam starting from the restricted section was not observed even after 2 hours had passed. On the other hand, when the speed control as in the present embodiment was not performed, a traffic jam occurred when 20 minutes passed from the start of the regulation, and the traffic jam was not eliminated until the regulation ended.

  As described above, according to the example according to the embodiment of the present invention, since the speed is automatically reduced stepwise toward the lane restriction section, it can be confirmed that no congestion occurs in the lane restriction section. It was.

  Generally, by setting a restriction speed to be displayed on the variable speed restriction display device, the speed can be lowered stepwise toward a traffic restriction section such as a lane restriction section. However, the regulation speed in the traffic regulation section has to be set in advance or set manually according to the traffic volume.

  According to the speed regulation support system of the present invention, the assumed traffic speed of the regulation section is calculated using the traffic information acquired in real time, and the regulation speed is automatically determined based on the assumed traffic speed. Therefore, traffic control can be executed according to the traffic volume as long as initial information regarding lane control is set.

  In the present embodiment, the lane restriction has been described, but it can also be applied to a case where the vehicle speed needs to be reduced in a traffic restriction section, for example. In addition, it is possible to cope with traffic regulations not only on motorways such as expressways but also on general roads.

  Although the present invention has been described with reference to the embodiments and examples, the present invention is not limited to the above embodiments and examples. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
A traffic measurement device that acquires traffic information of a road and measures the length and occupation rate of a vehicle passing through the road;
A speed regulation support device that performs control for notifying a regulation speed set according to a section in which the vehicle passes,
The speed regulation support device is
Calculate the assumed vehicle speed in the traffic regulation section after traffic regulation using the assumed traffic density calculated based on the vehicle length and the occupation rate acquired from the traffic volume measuring device,
A speed regulation support system that determines the regulation speed that changes stepwise before and after the traffic regulation section on the road including the traffic regulation section based on the assumed vehicle speed.
(Appendix 2)
The speed regulation support system according to appendix 1, wherein the regulation speed is determined so as to decrease stepwise as the traffic regulation section is approached.
(Appendix 3)
The section through which the vehicle passes is set to divide the road including the traffic regulation section along the width direction,
The speed regulation support system according to appendix 1 or 2, wherein the regulation speed is determined so as to be smaller as the section is closer to the traffic regulation section.
(Appendix 4)
The speed regulation support system according to claim 3, wherein the regulation speed is determined so as to change by a specific speed for each of the adjacent sections.
(Appendix 5)
The speed regulation support device is
A storage unit for storing an information table for recording the traffic regulation information;
A processing unit that calculates the estimated vehicle speed in the traffic regulation section after the traffic regulation using the assumed traffic density calculated based on the traffic regulation information and the occupation rate;
A determination unit that determines the restriction speed on the road after the traffic restriction based on the assumed vehicle speed;
The speed regulation support system according to any one of supplementary notes 1 to 4, further comprising: a control unit that performs control for notifying the vehicle traveling on the road of the regulation speed.
(Appendix 6)
Furthermore, a vehicle detection device having a detection unit for acquiring the traffic information,
The traffic volume measuring device is
The vehicle length and the occupancy rate of vehicles traveling on the road based on the traffic information acquired by the detection unit are averaged, and the averaged data is transmitted to the speed regulation support device. 5. The speed regulation support system according to 5.
(Appendix 7)
Furthermore, a speed regulation notification device having a notification unit for notifying the regulation speed notified by the control unit,
The speed control support system according to appendix 6, wherein the control unit controls the notification unit so as to notify the control speed.
(Appendix 8)
The notification unit is a speed regulation display device installed at a specific interval on the road,
The speed regulation support system according to appendix 7, wherein the speed regulation display device displays the regulation speed in accordance with the control of the control unit.
(Appendix 9)
The speed regulation support system according to appendix 7, wherein the notification unit is mounted on the vehicle and notifies the regulation speed by image information or audio information.
(Appendix 10)
10. The speed regulation support system according to any one of appendices 7 to 9, wherein the notification unit continues to notify the regulation speed at least during a period from the start time to the end time of the traffic regulation.
(Appendix 11)
The speed regulation support system according to claim 10, wherein the speed regulation display device starts to notify the regulation speed before the traffic regulation is started.
(Appendix 12)
Furthermore, a lane restriction input device having an input device for inputting lane restriction information is provided,
The speed regulation support system according to any one of appendices 1 to 11, wherein the lane regulation input device transmits the lane regulation information to the speed regulation support device.
(Appendix 13)
Obtain road traffic information and measure the vehicle length and occupancy of vehicles traveling on the road,
Calculate the assumed vehicle speed in the traffic regulation section after traffic regulation using the assumed traffic density calculated based on the vehicle length and the occupation rate,
Based on the assumed vehicle speed, the restriction speed that changes stepwise before and after the traffic restriction section on the road including the traffic restriction section is determined, and the restriction speed set according to the section in which the vehicle passes A speed regulation support method characterized by performing control for notifying the vehicle.

DESCRIPTION OF SYMBOLS 1 Speed regulation assistance apparatus 2 Traffic volume measurement apparatus 3 Lane regulation input apparatus 4 Vehicle detection apparatus 5 Speed regulation notification apparatus 7 Variable speed regulation display apparatus 8 Vehicle detector 9 Road 10 Speed regulation assistance system 11 Storage part 13 Processing part 15 Determination Unit 17 Control unit 21 Interface 22 Processing unit 31 Input device 32 Output device 40 Information table 41 Detection unit 51 Notification unit 90 Traffic regulation zone 91 Lane boundary line 92 Traffic regulation section 109 Vehicle 111 Light emitting device 108 Expressway 181 Central line

Claims (10)

A traffic measurement device that acquires traffic information of a road and measures the length and occupation rate of a vehicle passing through the road;
A speed regulation support device that performs control for notifying a regulation speed set according to a section in which the vehicle passes,
The speed regulation support device is
Calculate the assumed vehicle speed in the traffic regulation section after traffic regulation using the assumed traffic density calculated based on the vehicle length and the occupation rate acquired from the traffic volume measuring device,
A speed regulation support system that determines the regulation speed that changes stepwise before and after the traffic regulation section on the road including the traffic regulation section based on the assumed vehicle speed.   The speed regulation support system according to claim 1, wherein the regulation speed is determined so as to decrease stepwise as the traffic regulation section is approached. The section through which the vehicle passes is set to divide the road including the traffic regulation section along the width direction,
The speed regulation support system according to claim 1 or 2, wherein the regulation speed is determined so as to be smaller as the section is closer to the traffic regulation section. The speed regulation support device is
A storage unit for storing an information table for recording traffic regulation information;
A processing unit that calculates the estimated vehicle speed in the traffic regulation section after the traffic regulation using the assumed traffic density calculated based on the traffic regulation information and the occupation rate;
A determination unit that determines the restriction speed on the road after the traffic restriction based on the assumed vehicle speed;
4. A speed regulation support system according to claim 1, further comprising: a control unit that performs control for notifying the vehicle traveling on the road of the regulation speed. 5. Furthermore, a vehicle detection device having a detection unit for acquiring the traffic information,
The traffic volume measuring device is
The vehicle length and the occupancy rate of a vehicle traveling on the road are averaged based on the traffic information acquired by the detection unit, and the averaged data is transmitted to the speed regulation support device. Item 5. The speed regulation support system according to item 4. Furthermore, a speed regulation notification device having a notification unit for notifying the regulation speed notified by the control unit,
The speed control support system according to claim 5, wherein the control unit controls the notification unit to notify the control speed. The notification unit is a speed regulation display device installed at a specific interval on the road,
The speed regulation support system according to claim 6, wherein the speed regulation display device displays the regulation speed according to control of the control unit.   8. The speed regulation support system according to claim 6, wherein the notification unit continues to notify the regulation speed at least during a period from a start time to an end time of the traffic regulation. Furthermore, a lane restriction input device having an input device for inputting lane restriction information is provided,
The speed regulation support system according to any one of claims 1 to 8, wherein the lane regulation input device transmits the lane regulation information to the speed regulation support device. The traffic measuring device acquires the traffic information of the road and measures the length and occupation rate of the vehicle passing through the road,
The speed regulation support device calculates the assumed vehicle speed in the traffic regulation section after traffic regulation using the assumed traffic density calculated based on the vehicle length and the occupation rate,
The speed regulation support device determines the regulation speed that changes stepwise before and after the traffic regulation section on the road including the traffic regulation section based on the assumed vehicle speed.
The speed regulation support method, wherein the speed regulation support device performs control to notify the regulation speed set according to a section in which the vehicle passes.

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