JP5979270B2 - Traffic signal control system and traffic signal control apparatus - Google Patents

Description

  The present invention relates to a traffic signal control system capable of performing appropriate traffic signal control according to the traffic volume of an electric vehicle that is a vehicle that uses an electric motor as a power source and the traffic volume of other vehicles.

  In the traffic signal control system, the traffic signal controllers in the same subarea are operated with the same cycle length (the time required for one round of the signal display), with 5 adjacent intersections as a group of subareas. Green signals between traffic signal controllers so that as many vehicles as possible can pass through all intersections where these traffic signal controllers are installed during the time when traffic signal controllers in the sub-area are displaying green signals. In general, the system control is performed to give an appropriate offset to the start time of (Patent Document 1).

  For example, as shown in FIG. 1, a traffic signal controller installed at each intersection with the intersection ISA, the intersection ISB, the intersection ISC, the intersection ISD, the intersection ISE, and the intersection ISF existing continuously on the road R1 as one subarea. When system control is performed in 2A, traffic signal controller 2B, traffic signal controller 2C, traffic signal controller 2D, traffic signal controller 2E, traffic signal controller 2F, as shown in FIG. In the offset diagram taking the traffic signal controller arranged according to the distance of the vertical axis and taking time on the vertical axis, the downward direction (the direction from the intersection ISA to the intersection ISF is the downward direction) and the upward direction (from the intersection ISF) In order to smooth the traffic volume in the direction toward the intersection ISA (upward direction), an offset is set at the start time of the green signal (blank area in FIG. 3) of each traffic signal controller. Down through band (a vehicle that travels in the down direction can pass through the six intersections without signal waiting time) and an up through band (the vehicle that travels in the up direction has six It is possible to secure a time zone in which an intersection can be passed without a signal waiting time.

  In this way, traffic flow can be smoothed by appropriately determining signal control parameters such as offsets between intersections in each sub-area according to the traffic volume and average travel speed for each direction of travel. Become.

By the way, as a countermeasure against environmental problems, an electric vehicle (an electric vehicle (EV) in a narrow sense using only an electric motor as a power source, a vehicle having a plurality of power sources including an electric motor, such as an electric motor and a gasoline engine). The spread of hybrid electric vehicles (including HEV) is desired. An electric vehicle has excellent features such as low noise and a small amount of emission of air pollutants such as NOx and CO ₂ .

JP 2010-078327 A

  However, traffic signal control utilizing the characteristics of these electric vehicles has not been performed so far.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a traffic signal control system and the like capable of performing appropriate traffic signal control utilizing the characteristics of an electric vehicle.

  A traffic signal control system according to an embodiment of the present invention is a traffic signal control system that controls traffic in a road section including a plurality of intersections where signal lights are installed, and the electric motor that travels in the road section is a power source. Traffic information acquisition means for acquiring traffic information including a value based on the number of vehicles to be operated, and traffic so that the vehicle travels at a first speed on the road section based on the traffic information acquired by the traffic information acquisition means Any of a plurality of control methods including a first speed control for controlling the vehicle and a second speed control for controlling traffic so that the vehicle travels on the road section at a second speed greater than the first speed. A selection means for selecting one of the control methods, and a signal control means for controlling the signal lamps installed at the plurality of intersections, wherein the signal control means is a control method selected by the selection means. Those that are configured to control based.

According to this traffic signal control system, an electric vehicle that is a vehicle that uses an electric motor as a power source (as described above, an electric vehicle (EV) in a narrow sense that uses only an electric motor as a power source, an electric motor and a gasoline engine, etc. As described above, according to the traffic information including the value based on the number of hybrid electric vehicles (including HEV) which are vehicles having a plurality of power sources including an electric motor, the traffic is controlled so that the vehicle travels at the first speed. A plurality of control methods including a first speed control for controlling and a second speed control for controlling traffic so that the vehicle travels at a second speed greater than the first speed. select. For example, it can be selected as follows.
Electric vehicle has a small noise, since less emissions of air pollutants such as NOx and CO _2, when the ratio of the electric vehicle is large, even if the traveling speed of the vehicle traveling the road section is increased, the peripheral The effects of noise and air pollutant emissions are small. Therefore, when the ratio of the electric vehicle is large, the second speed control is selected.
On the other hand, vehicles other than electric vehicles (hereinafter referred to as “non-electric vehicles”) such as gasoline engine and diesel engine power sources are noisy and emit large amounts of air pollutants such as NOx and CO _2. Therefore, when the proportion of non-electric vehicles is large, that is, when the proportion of electric vehicles is small, the influence of noise and air pollutant emissions on the surroundings becomes large as the vehicle traveling speed increases. Therefore, when the ratio of the electric vehicle is small, the first speed control is selected.
In this way, it is possible to perform appropriate traffic signal control utilizing the characteristics of the electric vehicle.

  The traffic information includes a ratio of the number of vehicles using the electric motor as a power source to the total number of vehicles traveling on the road section, and the selection unit is configured to display the ratio exceeding a predetermined threshold. Preferably, the second speed control is selected. In this case, appropriate traffic signal control utilizing the characteristics of the electric vehicle can be performed according to the ratio of the electric vehicle.

Further, when the selection unit selects any one of the plurality of control methods, the signal control unit performs control based on the control method selected by the selection unit for a predetermined time or more. It is preferable to be configured.
As a result, it is possible to prevent the driver from being confused due to frequent switching of a plurality of control methods.

  In addition, a display means for displaying a regulated speed for a vehicle traveling on the road section is provided, and when the selection means selects the first speed control, the display means is based on the first speed as the regulated speed. When the speed is displayed and the selection means selects the second speed control, the display means is preferably configured to display a speed based on the second speed as a regulation speed.

  When the first speed control is selected, the speed based on the first speed is displayed as the regulated speed, and when the second speed control is selected, the speed based on the second speed is displayed as the regulated speed. Therefore, the driver can recognize which of the first speed control and the second speed control is selected, and can drive according to the selected control method.

  Further, the traffic signal control apparatus includes the selection unit, and the traffic signal control unit controls the signal lamps installed at the plurality of intersections based on the control method selected by the selection unit. A traffic signal control device including a control command generating means for generating signal control command information is useful for a traffic signal control system. The plurality of traffic signal controllers correspond to the signal control means of the traffic signal control system.

The control command creating means sets an offset based on the first speed when the selecting means selects the first speed control, and when the selecting means selects the second speed control, It is preferable to set an offset based on the second speed and create signal control command information based on a signal control parameter including the set offset.
Thereby, the first speed control and the second speed control can be effectively performed.

  ADVANTAGE OF THE INVENTION According to this invention, appropriate traffic signal control which utilized the characteristic of the electric vehicle can be performed.

It is a schematic diagram which shows the outline | summary of the traffic signal control system which concerns on embodiment of this invention. It is a block diagram which shows the structure of a traffic signal control apparatus. It is the offset figure which described the green signal time and red signal time of each intersection based on the 1st signal control parameter. It is the offset figure which described the green signal time and red signal time of each intersection based on the 2nd signal control parameter. It is a flowchart which shows the procedure of a control method selection process.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Overall system configuration]
FIG. 1 is a schematic diagram showing an outline of a traffic signal control system according to an embodiment of the present invention. The traffic signal control system includes a traffic signal control device 1, a traffic signal controller 2, a roadside communication device 3, a speed limit sign 4, and the like.
The traffic signal control device 1 is installed in a traffic control center, and a traffic signal controller 2 (FIG. 1) installed at each intersection IS (intersections ISA, ISB, ISC, ISD, ISE, ISF in FIG. 1). Then, the traffic signal controllers 2A, 2B, 2C, 2D, 2E, and 2F) are connected by a communication line such as a telephone line. The traffic signal control device 1 may be installed on the road instead of being installed in the traffic control center.
Further, the traffic signal control device 1 is connected between the intersections in the downward direction of the road R1 (direction from the intersection ISA to the intersection ISF) and between the intersections in the upward direction of the road R1 (direction from the intersection ISF to the intersection ISA). It is connected to the installed roadside communication apparatus 3 (in FIG. 1, roadside communication apparatuses 3AB, 3BC, 3CD, 3DE, 3EF, 3FE, 3ED, 3DC, 3CB, 3BA) via a communication line such as a telephone line.
Further, the traffic signal control device 1 is provided with a speed limit sign 4 (a speed limit sign 4AB in FIG. 1) installed between road intersections in the downward direction of the road R1 and side roads between road intersections in the upward direction of the road R1. 4BC, 4CD, 4DE, 4EF, 4FE, 4ED, 4DC, 4CB, 4BA) and a communication line such as a telephone line.

Here, a section from the intersection ISA to the intersection ISF in the road R1 is hereinafter referred to as a road section RSEC1.
Among the intersections ISA to ISF included in the road section RSEC1, the intersection ISA and the intersection ISD are important intersections, and the intersection ISB, the intersection ISC, the intersection ISE, and the intersection ISF are general intersections.
The definitions of terms for important intersections and general intersections are as follows.
・ Important intersections: Intersections that usually have a large load factor and often become a bottleneck are called important intersections. In general, intersections between trunk and semi-highway roads fall under this category.
-General intersections: Traffic demands on secondary roads are less than important intersections. For example, an intersection that simply needs to secure the green time for crossing pedestrians is called a general intersection.

[Traffic signal controller 2]
The traffic signal controller 2 receives signal control command information, which will be described later, from the traffic signal control device 1, and turns on / off each signal lamp of a signal lamp (not shown) installed at an intersection based on the signal control command information. Control blinking.

[Roadside communication device 3]
The roadside communication device 3 is a device that performs narrow-area communication such as an optical beacon, wireless LAN, and DSRC (Dedicated Short Range Communication), and communicates with an in-vehicle device mounted on a vehicle that passes through a communication area (not shown). Then, the type of the vehicle (whether it is an electric vehicle) is acquired, the number of vehicles (traffic volume) communicated is measured, and the result is transmitted to the traffic signal control device 1.
An electric vehicle refers to a vehicle that uses an electric motor as a power source, and includes a plurality of electric motors such as an electric vehicle (EV) in a narrow sense that uses only the electric motor as a power source, and an electric motor and a gasoline engine. This is a concept including a hybrid electric vehicle (HEV) that is a vehicle equipped with a power source.

[Speed limit sign 4]
The speed limit sign 4 is a sign that can variably display the speed limit by the LED, receives information on a display speed limit to be described later from the traffic signal control device 1, and displays the display speed limit.

[Traffic signal control device 1]
FIG. 2 is a block diagram showing the configuration of the traffic signal control apparatus. The traffic signal control device 1 includes a calculation unit 101, a storage unit 102, a transmission / reception unit 103, a clock unit 104, and the like.
The arithmetic unit 101 is composed of one or a plurality of computers, and controls the entire apparatus. In addition, the calculation unit 101 performs various calculation processes such as a control method selection process described later. These various calculation processes are performed by the computer of the calculation unit 101 executing a computer program recorded in a predetermined storage medium such as a CD-ROM or a hard disk.

The storage unit 102 stores various calculation processing results by the calculation unit 101 and various types of information received by the transmission / reception unit 103.
The transmission / reception unit 103 receives information on the type of each vehicle, information on traffic volume, and the like from the roadside communication device 3.
Further, the transmission / reception unit 103 transmits signal control command information including a signal control parameter to the traffic signal controller 2, and transmits display limit speed information to the speed limit sign 4.
The clock unit 104 acquires time information.

  The calculation unit 101 executes a control method selection process, which will be described later, based on the vehicle type information and traffic volume information of the roadside communication device 3 received by the transmission / reception unit 103 and the time information acquired by the clock unit 104. The first speed control for controlling traffic so that the vehicle travels on the road section RSEC1 at the first speed (for example, 45 km / h), or the second speed on which the vehicle is larger than the first speed on the road section. One of the control methods is selected from the second speed control for controlling the traffic so as to travel at (for example, 55 km / h).

When the first speed control is selected, the calculation unit 101 sets the first signal control parameter SPM1 so that the system control based on the first speed can be performed. The system control is a system in which several traffic signal controllers installed along the main road are treated as a unit of signal control and controlled with a certain time relationship with each other.
On the other hand, when the second speed control is selected, the calculation unit 101 sets the second signal control parameter SPM2 so that the system control based on the second speed can be performed.

Both the first signal control parameter SPM1 and the second signal control parameter SPM2 include cycle length, split, offset, and the like. The definitions of the terms cycle length, split, and offset are as follows.
-Cycle length: One cycle of signal light color display is called one cycle, and the time required for one cycle is called cycle length.
・ Split: The right of access given to each inflow path at the intersection is called “presentation”, and the time ratio of each indication in one cycle is called “split”.
• Offset: In system control, the deviation that is given to the start of one cycle of each traffic signal controller is called offset.

  FIG. 3 is an offset diagram illustrating the green signal time and red signal time of each intersection based on the first signal control parameter SPM1, and FIG. 4 is a diagram illustrating the green signal time and red signal of each intersection based on the second signal control parameter SPM2. It is an offset figure which described signal time.

3 and 4, on the horizontal axis, west from the intersection ISA on the road R1 (direction from the intersection ISF to the intersection ISA) east along the road R1 when the point of the predetermined distance is the origin ( (Direction from intersection ISA to intersection ISF) The distance traveled [m] is taken, the vertical axis is the time [s] when the arbitrary time is the origin, and the horizontal axis is the distance between the intersections. Accordingly, traffic signal controllers 2A to 2F are arranged.
The solid line along the vertical axis indicates the red time for the vehicle on the road R1 in each traffic signal controller 2A to 2F, and the blank part between the solid line along the vertical axis adjacent to this solid line is each traffic signal controller. The blue hours for vehicles on the road R1 in 2A to 2F are shown.

The area between the oblique solid line SBD1-1 and the oblique solid line SBD2-1 in FIG. 3 and the area between the oblique solid line SBD1-2 and the oblique solid line SBD2-2 in FIG. There is a time zone in which a vehicle traveling in the downward direction can pass through the intersection ISA or the intersection ISF without a signal waiting time.
Also, the region between the oblique solid line SBU1-1 and the oblique solid line SBU2-1 in FIG. 3, and the region between the oblique solid line SBU1-2 and the oblique solid line SBU2-2 in FIG. This is a time zone in which a vehicle traveling in the upward direction can pass through the intersections ISF to ISA without waiting for a signal.

The solid lines SBD1-1, SBD2-1, SBU1-1, SBU2-1 in FIG. 3 and the solid lines SBD1-2, SBD2-2, SBU1-2, SBU2-2 in FIG. 4 represent the speeds, respectively. The solid lines SBD1-1, SBD2-1, SBU1-1, and SBU2-1 in FIG. 3 are all the first speed (45 km / h in this example), and the solid lines SBD1-2, SBD2-2, and SBU1- in FIG. 2 and SBU2-2 are both the second speed (55 km / h in this example).
Therefore, in FIG. 3, when the vehicle traveling in the downward direction on the road section RSEC1 travels at the first speed, it can pass through the intersection ISA to the intersection ISF all in green and travel on the road section in the upward direction. The vehicle that travels at the first speed can pass through the intersections ISF to ISA with a green light.
On the other hand, in FIG. 4, when the vehicle traveling in the downward direction on the road section RSEC1 travels at the second speed, it can pass through the intersection ISA to the intersection ISF all in green, and travels in the upward direction on the road section. When the vehicle is traveling at the second speed, it can pass through the intersections ISF to ISA with a green light.

Thus, when the first speed control is selected, the calculation unit 101 sets the first signal control parameter SPM1 including an offset based on the first speed, and when the second speed control is selected, A second signal control parameter SPM2 including an offset based on the second speed is set.
Then, the calculation unit 101 sends signal control command information including the first signal control parameter SPM1 or the second signal control parameter SPM2 to each traffic signal controller 2A to 2F installed at each intersection ISA to ISF of the road section RSEC1. Transmission is performed via the transmission / reception unit 103.

Hereinafter, the control method selection process performed by the calculation unit 101 of the traffic signal control device 1 will be described.
FIG. 5 is a flowchart showing the procedure of the control method selection process. The calculation unit 101 executes the control selection process every predetermined cycle (for example, 5 minutes).

First, the calculation unit 101 of the traffic signal control device 1 determines that the time indicated by the clock unit 104 of the traffic signal control device 1 is in a predetermined time zone (for example, a time zone from 22:00 at night to 5:00 on the next day). It is determined whether it is included (step S01).
When it is determined that it is not included in the predetermined time zone (NO in step S01), operation unit 101 executes the processes after step S11.

On the other hand, when it is determined that it is included in the predetermined time zone (YES in step S01), the calculation unit 101 starts from each roadside communication device 3 in the most recent period (5 minutes in this example). The vehicle type information (whether or not it is an electric vehicle) and traffic volume information are analyzed, and the ratio (mixing rate) of electric vehicles is calculated in the down and up directions between the intersections of the road section RSEC1 ( Step S02).
For example, in the downward direction of the intersection ISA and the intersection ISB, the number of electric vehicles is calculated from information on the type of vehicle (electric vehicle or not) collected from the roadside communication device 3AB and collected from the roadside communication device 3AB. The ratio of electric vehicles is calculated by dividing by the traffic volume.

Next, the calculation unit 101 determines that at least one of the ratios calculated in step S02 for the downlink direction and the uplink direction between the intersections of the road section RSEC1 in all of the latest predetermined number (for example, 6) periods. It is determined whether or not a preset ratio threshold (for example, 20%) is exceeded (step S03).
If it is determined that at least one of the most recent predetermined number of periods exceeds the ratio threshold value (YES in step S03), operation unit 101 executes the processes in and after step S11.
On the other hand, when it is determined that at least one of the most recent predetermined number of periods does not exceed the above-mentioned ratio threshold, that is, in all the most recent predetermined number of periods, the downward direction between the intersections of the road section RSEC1 And when it determines with all the ratios calculated by step S02 about the up direction becoming less than the said ratio threshold value (in step S03 NO), the calculating part 101 performs the process after step S04.

In step S11, the calculation unit 101 determines whether the previous control method is the first speed control.
If it is determined that the control method so far is the first speed control (YES in step S11), the processes after step S12 are executed.
On the other hand, when it is determined that the conventional control method is not the first speed control (NO in step S11), the calculation unit 101 selects the second speed control as the traffic control method for the road section RSEC1 (step S11). S13). Electric vehicle has a small noise, since less emissions of air pollutants such as NOx and CO _2, when the ratio of the electric vehicle is large, even if the traveling speed of the vehicle traveling the road section is increased, the peripheral The effects of noise and air pollutant emissions are small. Therefore, when the ratio of the electric vehicle is large, the second speed control is selected.

In step S12, the calculation unit 101 determines whether or not the first speed control is continued for a time threshold (for example, 30 minutes) or more.
When it is determined that the first speed control is continued for the time threshold or more (YES in step S12), the calculation unit 101 selects the second speed control as the traffic control method for the road section RSEC1 (step S13). ).
On the other hand, when it is determined that the first speed control is not continued for the time threshold or more (NO in step S12), the calculation unit 101 selects the first speed control as the traffic control method for the road section RSEC1 ( Step S06).
As described above, when the first speed control is selected, the second speed control is selected only after the first speed control is continued for a predetermined time or more even if the ratio of the electric vehicle subsequently increases. The driver's confusion due to frequent switching between the first speed control and the second speed control can be prevented.

In step S04, the calculation unit 101 determines whether the conventional control method is the second speed control.
When it is determined that the control method so far is the second speed control (YES in step S04), the processes after step S05 are executed.
On the other hand, when it is determined that the conventional control method is not the second speed control (NO in step S04), the calculation unit 101 selects the first speed control as the traffic control method for the road section RSEC1 (step S04). S06). Non-electric vehicles such as vehicles powered by gasoline engines and diesel engines are noisy and emit large amounts of air pollutants such as NOx and CO _2. When the proportion of automobiles is small, the influence of noise and air pollutant emissions on the surrounding area is large when the traveling speed of the vehicle increases. Accordingly, when the proportion of the electric vehicle is small, the first speed control is selected.

In step S05, the calculation unit 101 determines whether or not the second speed control is continued for a time threshold (for example, 30 minutes) or more.
When it is determined that the second speed control is continued for the time threshold or more (YES in step S05), the calculation unit 101 selects the first speed control as the traffic control method for the road section RSEC1 (step S06). ).
On the other hand, when it is determined that the second speed control is not continued for the time threshold or more (NO in step S05), the calculation unit 101 selects the second speed control as the traffic control method for the road section RSEC1 ( Step S13).
As described above, when the second speed control is selected, the first speed control is selected only after the second speed control is continued for a predetermined time or more even if the ratio of the electric vehicle subsequently decreases. The driver's confusion due to frequent switching between the first speed control and the second speed control can be prevented.

  As described above, the traffic signal control device 1 calculates the ratio (mixing rate) of electric vehicles in the road section RSEC1, and according to this ratio, traffic is generated so that the vehicle travels on the road section RSEC1 at the first speed. Select either one of the first speed control for controlling traffic and the second speed control for controlling traffic so that the vehicle travels on the road section at a second speed greater than the first speed. To do.

Next, the traffic signal control device 1 sets signal control parameters corresponding to the selected control method. That is, when the first speed control is selected, the first signal control parameter SPM1 is set, and when the second speed control is selected, the second signal control parameter SPM2 is set.
Next, the traffic signal control device 1 creates signal control command information based on the set signal control parameters, and transmits the signal control command information to the traffic signal controllers 2A to 2F installed in the road section RSEC1.

Next, the traffic signal control device 1 sets a display speed limit corresponding to the selected control method. That is, when the first speed control is selected, the display limit speed is set to a speed based on the first speed (in this example, the first speed is 45 km / h and a margin of 5 km / h is added to 50 km / h). If the second speed control is selected, the display limit speed is set to a speed based on the second speed (in this example, the second speed is 55 km / h and a margin of 5 km / h is added to 60 km / h). To do.
Next, the traffic signal control device 1 transmits information on the set display speed limit to the speed limit sign 4 installed in the road section RSEC1.

  As described above, according to the present embodiment, when the ratio of the electric vehicle is small, the influence of noise and air pollutant emission to the surroundings is large, so that the vehicle travels at a low first speed. If the ratio of electric vehicles is large, the impact of noise and air pollutant emissions on the surroundings is small, so traffic can be controlled so that the vehicle travels at the second high speed. Appropriate traffic signal control utilizing the characteristics of electric vehicles can be performed according to the proportion of vehicles.

  Further, according to the present embodiment, one of the first speed control and the second speed control is performed according to the ratio of the electric vehicle, particularly in a predetermined time zone such as at night when the influence of the vehicle noise is large. By selecting the control method, the generation of noise is suppressed, and during normal times other than the predetermined time period, the second speed control is selected to reduce the occurrence of traffic jams. It is possible to perform optimal traffic control considering the influence of vehicle noise and traffic conditions.

  In addition, according to the present embodiment, when the traffic signal control device 1 selects the first speed control, the first speed control is continued for a predetermined time or more even if the ratio of the electric vehicle subsequently increases. The second speed control is not selected. On the other hand, if the second speed control is selected, the first speed is not changed until the second speed control is continued for a predetermined amount or more even if the ratio of the electric vehicle subsequently decreases. Since the control is not selected, it is possible to prevent the driver from being confused due to frequent switching between the first speed control and the second speed control.

  Further, according to the present embodiment, when the first speed control is selected, the speed limit indicator 4 displays the speed based on the first speed as the restriction speed, and the second speed control is selected. Since the speed limit indicator 4 displays the speed based on the second speed as the regulated speed, the driver can recognize whether the first speed control or the second speed control is selected and selected. The operation according to the control method is possible.

  In the above-described embodiment, the first speed control is selected when the ratio of the electric vehicle is equal to or less than the ratio threshold value in a predetermined time zone such as at night. However, the present invention is not limited to this. For example, even if the ratio of electric vehicles is equal to or less than the ratio threshold value in the predetermined time zone, the traffic volume of the vehicle traveling on the road section RSEC1 is the traffic volume threshold value (for example, the traffic volume for 15 minutes per lane is 150). If it is above, it is good also as a structure which selects 2nd speed control, without selecting 1st speed control. This is because if a traffic jam occurs, the vehicle repeats stopping and starting, which may promote noise generation. As a result, it is possible to perform optimal traffic control that further considers the influence of the noise of the vehicle on the surroundings and the traffic situation. Instead of determining whether or not the traffic volume of the vehicle traveling on the road section RSEC1 is equal to or higher than the traffic volume threshold value, it is determined whether or not the congestion degree of the road section RSEC1 is higher than the congestion (that is, whether the average speed is 10 km / h or lower). Or the representative value (for example, average value, median value, etc.) of the travel time of the vehicle traveling on the road section RSEC1 is determined to be greater than or equal to the travel time threshold value (for example, 10 minutes). Alternatively, the determination may be made by combining these.

  Further, in the above-described embodiment, the configuration is such that either one of the first speed control and the second speed control is selected for both the down direction and the up direction of the road section RSEC1. However, the present invention is not limited to this, and only one of the down direction and the up direction of the road section RSEC1 may be configured to select one of the first speed control and the second speed control. .

  Moreover, in the above-mentioned embodiment, although the traffic signal control apparatus 1 was the structure which selects any one control method of 1st speed control and 2nd speed control, it is not limited to this, This The configuration may be such that any one of three or more control methods including two control methods and another control method is selected.

  In the above-described embodiment, the roadside communication device 3 is installed in the downward direction and the upward direction between all intersections of the road section RSEC1, but the present invention is not limited to this, and the upward direction of the road section RSEC1. The roadside communication device 3 may be installed at one or more of the intersections of the roadway, and the roadside communication device 3 may be installed at one or more of the intersections in the downward direction of the road section RSEC1. . Further, the roadside communication device 3 is installed at a point upstream of the upstream road segment RSEC1 on the road R1, that is, a point west of the intersection ISA, and a point upstream of the downstream road segment RSEC1 on the road R1. That is, the roadside communication device 3 may be installed at a point on the east side of the intersection ISF.

  In the above-described embodiment, the second speed control is performed when it is determined that at least one of the ratios of the electric vehicles in the downward direction and the upward direction between the intersections of the road section RSEC1 exceeds the ratio threshold. However, the present invention is not limited to this, and may be configured to select the second speed control when it is determined that a predetermined number (for example, three) or more exceeds the above-described ratio threshold. The configuration may be such that the second speed control is selected when it is determined that all exceed the above-described ratio threshold.

  Further, in the above-described embodiment, the first speed control and the first speed control are performed based on the information on the type of each vehicle (whether it is an electric vehicle) and the traffic information collected by the traffic signal control device 1 from the roadside communication device 3. Although it was the structure which selects any one control method in 2 speed control, it is not limited to this, Traffic signal controller 2A thru | or 2F installed in road area RSEC1 cooperate, and the roadside communication apparatus 3 The control method selects either one of the first speed control and the second speed control based on the information on the type of vehicle (whether it is an electric vehicle) and traffic volume information collected from Also good. Thereby, it is possible to perform appropriate traffic signal control utilizing the characteristics of the electric vehicle by using only the traffic signal controller 2 regardless of the traffic signal control device 1.

  In the above-described embodiment, when the first speed control is selected, the display speed limit is set to a speed based on the first speed, and when the second speed control is selected, the display speed limit is set. Although it was set as the speed based on the 2nd speed, and it was the composition which transmits the information on the set display limit speed to the speed limit mark 4 installed in road section RSEC1, it is not limited to this but the set display limit speed May be configured to notify the driver through a traffic information board installed in the road section RSEC1.

  In the above-described embodiment, the roadside communication device 3 is a device that performs narrow-area communication such as an optical beacon, but is not limited thereto, and is a device that performs wide-area communication (for example, an ITS radio). Also good.

  An electric vehicle is one type of environmentally-friendly vehicle that is a vehicle that achieves a significant reduction in environmental load compared to conventional vehicles. Environmentally-friendly vehicles include, in addition to electric vehicles, natural gas vehicles (vehicles driven by engines that use natural gas as fuel), vehicles that are driven by gasoline engines and diesel engines that are far below the specified environmental standards for exhaust gas, etc. Is included. In the above-described embodiment, the configuration is such that either one of the first speed control and the second speed control is selected in accordance with the proportion of the electric vehicle. Depending on the ratio, either one of the first speed control and the second speed control may be selected.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Traffic signal control apparatus, 101 calculating part, 102 memory | storage part, 103 transmission / reception part, 104 clock part 2, 2A, 2B, 2C, 2D, 2E, 2F traffic signal controller 3, 3AB, 3BC, 3CD, 3DE, 3EF, 3FE, 3ED, 3DC, 3CB, 3BA Roadside communication device 4, 4AB, 4BC, 4CD, 4DE, 4EF, 4FE, 4ED, 4DC, 4CB, 4BA Speed limit sign IS, ISA, ISB, ISC, ISD, ISE, ISF Intersection R1 road, RSEC1 road section

Claims (5)

A traffic signal control system for controlling traffic in a road section including a plurality of intersections where signal lights are installed,
Traffic information acquisition means for acquiring traffic information that includes values based on the number of vehicles that use the motor as a power source that travels on the road section;
Based on the traffic information acquired by the traffic information acquisition means, a first speed control for controlling traffic so that the vehicle travels at a first speed on the road section, and a vehicle on the road section from the first speed. Selecting means for selecting any one of a plurality of control methods including a second speed control for controlling traffic so as to travel at a second speed greater than
Signal control means for controlling signal lamps installed at the plurality of intersections,
The traffic information includes a ratio of the number of vehicles using the electric motor as a power source to the number of all vehicles traveling on the road section,
The signal control means is configured to control based on the control method selected by the selection means,
The traffic signal control system, wherein the selection means is configured to select the second speed control when the ratio exceeds a predetermined threshold. When the selection unit selects any one of the plurality of control methods, the signal control unit is configured to control based on the control method selected by the selection unit for a predetermined time or more. ing,
The traffic signal control system according to claim 1. A traffic signal control system for controlling traffic in a road section including a plurality of intersections where signal lights are installed,
Traffic information acquisition means for acquiring traffic information that includes values based on the number of vehicles that use the motor as a power source that travels on the road section;
Based on the traffic information acquired by the traffic information acquisition means, a first speed control for controlling traffic so that the vehicle travels at a first speed on the road section, and a vehicle on the road section from the first speed. Selecting means for selecting any one of a plurality of control methods including a second speed control for controlling traffic so as to travel at a second speed greater than
Signal control means for controlling signal lamps installed at the plurality of intersections;
Display means for displaying a regulated speed for a vehicle traveling on the road section,
When the selection means selects the first speed control, the display means displays a speed based on the first speed as a restriction speed, and when the selection means selects the second speed control, the display means is configured to display the speed based on the second speed as a speed limit,
Traffic signal control system. A traffic signal control device used in the traffic signal control system according to any one of claims 1 to 3, comprising the selection means,
Based on the control method selected by the selection means, comprising control command creation means for creating signal control command information for each of a plurality of traffic signal controllers that control the signal lamps installed at the plurality of intersections,
Traffic signal control device. The control command generation means sets an offset based on the first speed when the selection means selects the first speed control, and when the selection means selects the second speed control, Set the offset based on the speed of the, and create signal control command information based on the signal control parameters including the set offset,
The traffic signal control device according to claim 4.

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