WO2013026265A1

WO2013026265A1 - Intersection traffic control system and method

Info

Publication number: WO2013026265A1
Application number: PCT/CN2012/001149
Authority: WO
Inventors: 苏以捷; 苏晓峰; 杨伦; 王阳
Original assignee: Su Yijie
Priority date: 2011-08-21
Filing date: 2012-08-27
Publication date: 2013-02-28
Also published as: CN102426790B; CN102426790A

Abstract

An intersection traffic control system and method, the intersection traffic control system comprising: a calculation module (310) for calculating the preacceleration time of a vehicle in the traffic direction according to the distance between the crossing and a preacceleration stop line in a lane in the traffic direction at an intersection, the lane section marked between the crossing and the preacceleration stop line forming a vehicle preacceleration zone; and a green light control module (320), when only a first time remains before the current traffic phase ends, the green light control module controls a traffic light corresponding to the subsequent traffic phase of the current traffic phase to display a green color, the first time being less than or equal to the preacceleration time of the vehicle in the traffic direction corresponding to the subsequent traffic phase. The present invention improves the efficiency of vehicle traffic at an intersection.

Description

Plane intersection access control system and method

The present application claims priority to Chinese Patent Application No. 201110255776.4, entitled "Plane Intersection Access Control System and Method", filed on August 21, 2011, the entire contents of in. Technical field

The present invention relates to the field of electronic technology, and in particular to a planar intersection access control system and method. Background technique

At present, with the acceleration of urbanization and the improvement of living standards, the number of motor vehicles in many large cities has been increasing year by year, which has caused more and more serious traffic congestion problems.

Urban traffic congestion has already had a certain impact on people's frequent travel, and even to some extent, economic development. Therefore, how to "block" has become a hot topic for many engineers and technicians in the current research. For example, how to improve the vehicle traffic efficiency at a plane intersection is a technical subject worth studying. Summary of the invention

Embodiments of the present invention provide a planar intersection access control system and method for improving vehicle traffic efficiency at a planar intersection.

To solve the above technical problem, the embodiment of the present invention provides the following technical solutions:

A first aspect of the present invention provides a plane intersection traffic control system, including:

The measuring module is configured to calculate the distance between the lane intersection of the vehicle passing direction and the pre-acceleration parking line according to the traffic direction of the plane intersection, and calculate the pre-acceleration duration of the vehicle in the traffic direction of the vehicle, wherein between the intersection and the pre-acceleration parking line The delineated lane segments form a vehicle pre-acceleration zone;

a release control module, configured to display a color of the vehicle release signal corresponding to the next traffic phase of the current traffic phase when the first time interval is left from the end of the current traffic phase, wherein the first duration is less than or equal to The vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next travel phase is described.

Optionally, the release control module is configured to: when a first time period is left from the end of the current traffic phase, the traffic light corresponding to the next traffic phase that controls the current traffic phase displays the color of the vehicle release, and the traffic The vehicle's traffic priority indicated by the color displayed by the signal light is lower than the above Vehicle passing priority of the pre-pass phase.

Optionally, the plane intersection traffic control system further includes:

a parking line display module, configured to correspond to a pre-acceleration parking line display position according to different preset time periods, or according to a correspondence between a preset vehicle flow rate and a pre-acceleration parking line display position, in a plane intersection A pre-acceleration stop line is displayed on the lane in the direction of each vehicle passing through the intersection.

Optionally, the calculating module is specifically configured to: calculate, according to a distance between the pre-acceleration parking line and the intersection set in the lane of the vehicle passing direction of the plane intersection, and a maximum speed limit value or an average vehicle speed of the lane segment, The pre-acceleration duration of the vehicle in the direction of vehicle traffic.

Optionally, the release control module is configured to: when a first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase that controls the current traffic phase displays green, green, or yellow-green flash. The first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next transit phase.

A second aspect of the present invention provides a method for traffic control at a plane intersection, including:

According to the distance between the lane intersection of the vehicle passing direction at the plane intersection and the pre-acceleration parking line, the vehicle pre-acceleration duration of the vehicle passing direction is calculated, wherein the lane segment delineated between the intersection and the pre-acceleration parking line forms a vehicle Pre-acceleration zone

When a first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, wherein the first duration is less than or equal to the next traffic phase. The pre-acceleration duration of the vehicle in the direction of vehicle traffic.

Optionally, the vehicle traffic priority indicated by the color displayed by the traffic light is lower than the vehicle traffic priority of the current traffic phase.

Optionally, the method further includes:

According to the corresponding relationship between the preset time period and the pre-acceleration parking line display position, or according to the correspondence between the preset traffic flow and the pre-acceleration parking line display position, each vehicle traffic direction at the plane intersection The pre-acceleration stop line is displayed on the driveway.

Optionally, the distance between the lane intersection and the pre-acceleration parking line in the vehicle passing direction of the plane intersection is measured, and the vehicle pre-acceleration duration of the vehicle passing direction is calculated, including:

The vehicle is measured according to the distance between the pre-acceleration stop line and the intersection set in the lane of the vehicle passing direction at the intersection, and the maximum speed limit value or average speed of the lane segment. Pre-acceleration time.

Optionally, when the first time period is left from the end of the current traffic phase, the traffic light corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, including: remaining at the end of the current traffic phase For a time, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays green, green, or yellow-green flash. A third aspect of the present invention also provides a computer storage medium,

The computer storage medium stores a program that, when executed, includes some or all of the steps of the above-described planar intersection traffic control method.

It can be seen that, in the embodiment of the present invention, a pre-acceleration parking line is arranged on a lane in a vehicle traffic direction at a plane intersection, so that a lane segment demarcated between the intersection of the lane and the pre-acceleration parking line forms a vehicle pre-acceleration area; The intersection traffic control system calculates the vehicle pre-acceleration duration of the vehicle traffic direction according to the distance between the lane intersection of the vehicle traffic direction at the plane intersection and the pre-acceleration parking line; when the first time period is left from the end of the current traffic phase The traffic light corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, wherein the first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next traffic phase, thus achieving The next traffic phase has already started when the current traffic phase has not ended, so that the next traffic phase corresponding to the traffic in the traffic direction can be accelerated in advance in the vehicle pre-acceleration zone, so that the vehicle speed at the time of reaching the intersection may have been relatively high, passing The time at the intersection can be shortened. The system can be improved greatly plane of intersection vehicle traffic efficiency, and can lay the groundwork to ease traffic congestion. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic flow chart of a method for controlling a traffic at a plane intersection according to an embodiment of the present invention; FIG. 2-a is a schematic diagram of a plane intersection provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of another plane intersection provided by an embodiment of the present invention; FIG.

Figure 2-c is a schematic diagram of still another plane intersection provided by the embodiment of the present invention;

FIG. 3 is a schematic diagram of a plane intersection control system according to an embodiment of the present invention; FIG. FIG. 3 is a schematic diagram of another plane intersection control system according to an embodiment of the present invention. detailed description

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. The described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The details are described below separately.

The traffic signal lights release the vehicles in all directions at the intersection of the plane. The signal is released for one week. The combination of a group of vehicles is called a phase. The current phase is composed of green light, green flashing light and yellow light. At the intersection, all red runs in sequence to complete a phase, and then transition to the next phase. Referring to FIG. 1, an embodiment of the present invention provides a method for traffic control of a plane intersection, which may include:

110. The traffic control system calculates a vehicle pre-acceleration duration of the vehicle passing direction according to a distance between the lane intersection of the vehicle passing direction at the plane intersection and the pre-acceleration parking line;

Wherein, the lane segment demarcated between the intersection and the pre-acceleration parking line forms a vehicle pre-acceleration zone;

120. When the traffic control system has a first time interval from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release (eg, displaying green, green flash, yellow-green flash, or other The color indicating the release of the vehicle), wherein the first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next transit phase.

In one embodiment, the pre-acceleration stop line can be moved as needed for the application, thereby increasing flexibility. For example, the correspondence between the preset different time periods and the pre-acceleration parking line display position may be used (for example, the pre-acceleration parking line display position corresponding to the busy time period may be preset (for example, the displayed pre-acceleration parking line distance intersection 20) Meter or other value), the pre-acceleration stop line display position corresponding to the semi-busy time (for example, the displayed pre-acceleration stop line is 15 meters or other value from the intersection), and the pre-acceleration stop line display position corresponding to the idle time period (for example, the pre-acceleration displayed) The parking line is 10 meters from the intersection or other values), etc. For example, 7: 30-9:30, 17:30~20:00 can be designated as busy hours, 0:00~6:00 is designated as idle time, and other time periods are designated as semi-busy time, of course corresponding Different application scenarios may also have other time zone division methods, which are not exemplified here), or, according to the preset traffic flow and the pre-acceleration parking line display position (for example, when the intersection When the traffic volume is greater than 100 vehicles per minute, the displayed pre-acceleration stop line is 20 meters away from the intersection or other values. When the traffic volume at the intersection is 60~100 vehicles per minute, the displayed pre-acceleration stop line is 15 meters away from the intersection or other value. When the traffic at the intersection is less than 30 vehicles per minute, the displayed pre-acceleration stop line is 10 meters from the intersection or other value, and so on, and the pre-acceleration parking is displayed on the lane in the direction of each vehicle at the intersection. line. For example, a plurality of rows of lights may be arranged in the lane, a row of lights that are illuminated forms a pre-acceleration stop line, or a pre-acceleration stop line is formed by light projection onto the lane, or a pre-acceleration stop line is displayed by other means.

In another embodiment, the pre-acceleration stop line is fixed, wherein the distance between the fixed pre-acceleration stop line and the intersection (the length of the pre-acceleration zone of the vehicle) can be compared with the maximum speed limit of the road segment or measured. The average vehicle speed corresponds to, for example, assuming that the correspondence between the length of the vehicle pre-acceleration zone and the maximum speed limit is as follows, Ds=U _max *N _a , where Ds represents the length of the vehicle pre-acceleration zone, and U _max represents the highest segment The speed limit, Na^ shows the correction factor, in seconds. For example, if N _a = l seconds, assuming that the maximum speed limit of the road section is 20 m / s, the distance between the fixed pre-acceleration stop line and the intersection corresponds to 20 Meter, of course, you can adjust the value of Na as needed. For another example, assuming that the length of the pre-acceleration zone of the vehicle is the same as the average speed of the section (the average speed of the vehicle is, for example, the average speed of the vehicle passing through the section for a period of time (eg, 1 week or 1 month, etc.)) Ds=U _avg *N _b , where Ds represents the length of the vehicle pre-acceleration zone, U _avg represents the average speed limit of the road segment, and Nb shows the correction factor in seconds. For example, if N _b = 3 seconds, the road segment is assumed The average speed of the vehicle is 7 m / s, then the distance between the fixed pre-acceleration stop line and the intersection is 21 m. Of course, the value of N _b can be adjusted as needed. Of course, the location of the pre-acceleration stop line can also be planned based on experience. If the pre-acceleration stop line is determined according to the above mechanism, when the pre-acceleration stop line is determined, it will be fixed for a period of time (such as 1 month, half year or 1 year, etc.). If the pre-acceleration stop line is fixed, the pre-acceleration time of the vehicle can be adjusted according to the application scenario (that is, the transit time of the adjacent two phases is adjusted), thereby enhancing the flexibility of the application.

In the scenario where the pre-acceleration stop line is fixed, for example, the distance between the pre-acceleration stop line and the intersection set on the lane of the vehicle passing direction of the plane intersection and the maximum speed limit value or the average speed of the lane section ( The average speed can be obtained by real-time measurement or based on historical statistics; or Different time periods can be set corresponding to different average car speeds (such as busy hour, semi-busy time and idle time corresponding to different average speeds), and then the current average speed can be calculated according to the current time period, or according to the current light intensity. To determine the current average speed (different light intensity ranges correspond to different average tests); or, depending on the current road slippage, the current average speed (eg different wetness levels, different road frictions corresponding to different averages) Vehicle speed); Alternatively, the current average vehicle speed can be calculated by considering relevant parameters such as the current time period, the current light intensity, and the current road slippage degree. For example, the weights of the relevant parameters can be set according to different application scenarios, and different parameters. Corresponding to the same or different weights, the current average vehicle speed is calculated by combining the various parameters. If based on this mechanism, the average calculated vehicle speed is relatively scientific, and the average calculated vehicle speed is relatively scientific. Vehicle pre-calculated vehicle speed When speed long it tends to be more scientific and reasonable, will help protect the safety and reliability of the subsequent control), measure the length of time the vehicle vehicular traffic direction pre-acceleration. Of course, the pre-acceleration duration of the vehicle in the traffic direction of the vehicle may also be calculated according to the distance between the pre-acceleration parking line and the intersection provided on the lane of the vehicle passing direction at the plane intersection and other references.

The method of the embodiment can be embodied in a traffic control system.

For example, as shown in Figure 2-a or Figure 2-b, the plane intersection after the pre-acceleration stop line is set, wherein the plane intersection shown in Figure 2-a is provided with a sidewalk, Figure 2-b There is no sidewalk at the flat intersection shown. Of course, it is also possible that some of the intersections have sidewalks (not shown in this scene).

The following is illustrated by a specific example.

Assume that the north-south turn left the vehicle through a crossroad between the north and the south and the east-west intersection. Each phase is 30 seconds long and the entire cycle is 120 seconds. In the prior art, the green light phase is turned to the left in the north and south for 30 seconds, including green light for 22 seconds, green flash for 3 seconds, yellow light for 3 seconds, and intersection red light for 2 seconds. At this time, the effective green time is equal to the green light 22 seconds minus 2 seconds (driver response time and car start time) + green flash 3 seconds + available yellow light time 1 second, a total of 24 seconds; and the loss time is equal to the yellow light 2 Seconds + intersection red light 2 seconds + green light loss time 2 (driver response time and car start time) seconds up to 6 seconds. After implementing the solution of the present invention, if the pre-acceleration duration is 10 seconds by calculating the distance between the pre-acceleration stop line and the intersection, the overlap duration of the north-south straight green light phase and the north-south turn left green light phase is 10 seconds (ie, the pre-acceleration duration) ). Since the north-south turn left green light phase is released for 10 seconds in advance, it is extended from the original 30 seconds to 40 seconds. At this time, the north-south turns left to green. The lamp phase includes a green light for 34 seconds (overlap part time green light 10 seconds, original green light 22 seconds, original intersection red light 2 seconds), green flash light 3 seconds, yellow light time 3 seconds. Therefore, the effective green time is equal to 34 seconds of green light minus 2 seconds (the loss time is composed of 2 seconds for yellow light + 2 seconds for green light loss (driver response time and car start time) for 4 seconds, loss time is reduced by 2 seconds, transit time With an increase of 8 seconds, the traffic efficiency increased by 41%.

For another example, a crossroads consisting of a north-south straight green light phase, a north-south-to-left turn green light phase, an east-west straight green light phase, and an east-west turn green light phase four phases, assuming each green light phase duration is 40 seconds. (green light 32 seconds, green flash light 3 seconds, yellow light 3 seconds, intersection red light 2 seconds), effective green light time 34 seconds (green light 32 seconds, minus driver response and car start time 2 seconds, plus green flashing light 3 seconds, plus the available yellow light for 1 second), the phase transition loss time is equal to 6 seconds (yellow light 2 seconds, plus the intersection red light 2 seconds, plus driver response and car start time 2 seconds). After implementing the solution of the present invention, the intersection stop line is moved backward to form a pre-acceleration zone, and it is assumed that the vehicle needs to pass the acceleration zone for 10 seconds, then the north-south straight green light phase and the north-south turn left to the green light phase overlap portion (ie, The pre-acceleration time) is set to 10 seconds. At this time, the north-south turn left green light phase is extended from 40 seconds in the prior art to 50 seconds, the effective green time is 46 seconds, and the phase transition loss time is 4 seconds (yellow light 2 seconds, plus driver response and car start-up time) 2 seconds. After the green light overlaps, the original red light time of the intersection of 2 seconds is added to the green light transit time). It can be seen that, after implementing the solution of the present invention, the effective green light release time is extended from the original 34 seconds to 46 seconds under the condition that the entire phase period is constant, and the 6-second phase transition loss time is completely utilized, and the effective green light transit time is fully utilized. It is 12 seconds longer than the prior art and the efficiency is increased by 33%.

In general, the implementation of the embodiment of the present invention can relatively improve the green light passing efficiency of the intersection under the premise of the same phase period. By setting the pre-acceleration zone, not only can the phase loss time be offset, but also the speed of the vehicle passing through the intersection can be greatly improved. According to the time-distance/speed, the faster the speed in the same time, the more vehicles that pass through, and the higher the traffic efficiency. In the conventional solution of the embodiment of the present invention, not only the phase period can be greatly reduced, but also the red light waiting time is relatively shortened, thereby reducing fuel consumption and exhaust gas emissions. For example, suppose that each car has to pass five traffic lights per day, each traffic light waits for 30 seconds less, and the fuel consumption at idle speed is calculated by an average of 1 liter of gasoline per hour. Save billions of fuel.

5*0.5 minutes*1 liters/60 minutes*360 days*1 million units = 15 million liters Calculated at 7 yuan per liter of oil, it can save 15 million liters of oil per year * 7 yuan = 105 million yuan. This saves social resources while improving traffic efficiency.

Moreover, the project is easy to be reconstructed, and the original traffic facilities can be retained. For example, a pre-acceleration stop line can be added behind the existing parking line (which can be called an intersection stop line), and between the pre-acceleration stop line and the existing stop line. The area forms a pre-acceleration zone. By adjusting the phase shift mode of the traffic light, the phase of the green light, which is sequentially operated by a green light, a green flashing light, a yellow light, and a full red light, is transitioned to another green light phase (both the passing phase). The mode is changed to start the next green light phase at the same time when the current green light phase is not over. The time at which the two green light phases overlap is less than or equal to the time required for the vehicle controlled by the next green light phase to pass the pre-acceleration zone. The original camera sensor and other facilities can continue to be used.

Moreover, since the pre-acceleration stop line is far away from the crosswalk line (the zebra crossing), there is no need to worry about pedestrians coming out when the car starts, and pedestrians do not have to worry about vehicles with red lights when they cross the road, thus achieving a certain degree of realization. The separation of people and vehicles does not interfere with each other.

Moreover, the prior art has a long signal period, a long waiting time, and a relatively long green light release time. When the distance between the two intersections is relatively close, it is easy to cause the vehicle to stay in the intersection, and the vehicle that affects the next green light signal passes through the intersection, resulting in congestion, commonly known as green light. Most of the traffic jams on rainy and foggy days are also caused by this. After implementing the scheme of the present invention, the green light cycle can be shortened, and the phenomenon of green light can be reduced. At the same time, the bus time of each green light cycle is also reduced due to the shortening of the green light cycle, and the bus train phenomenon of the bus stop can be reduced.

In the specific implementation process, if the first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, and at this time, starts in the next traffic phase. For vehicles with faster or faster acceleration, there may be a problem that the vehicle with the current traffic phase collides at the intersection. This situation can be solved by avoiding the driving mechanism.

The avoidance driving mechanism can be implemented in various ways, for example, when the first time period is left from the end of the current traffic phase, the traffic light corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, and the traffic signal is displayed. The vehicle pass priority indicated by the color (eg, green flash or yellow-green flash) is lower than the vehicle pass priority of the current transit phase. In addition, you can change the original stop line at the intersection to the deceleration line (for example, the white double dashed line, as shown in Figure 2-c). It can be understood that, based on the avoidance driving mechanism, the vehicle in the next transit phase (for example, a car with a quick start or a high acceleration capability) Vehicle), when arriving at the intersection with the vehicle in the current transit phase, the vehicle in the next traffic phase avoids the current traffic phase because the vehicle traffic priority in the next traffic phase is lower than the vehicle traffic priority of the current traffic phase. The vehicle in the middle, so that traffic conflicts can be avoided.

As can be seen from the above, the embodiment of the present invention sets a pre-acceleration stop line on the lane of the vehicle passing direction of the plane intersection, so that the lane segment demarcated between the intersection of the lane and the pre-acceleration stop line forms a vehicle pre-acceleration area; According to the distance between the lane intersection of the vehicle passing direction and the pre-acceleration parking line at the intersection of the plane, the vehicle pre-acceleration time of the vehicle passing direction is calculated; when the first time period is left from the end of the current traffic phase, the current passage is controlled. The traffic light corresponding to the next transit phase of the phase displays the color of the vehicle release, wherein the first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle transit direction corresponding to the next transit phase, thus realizing the current transit phase has not yet been achieved. At the end, the next pass phase has started, so that the next pass phase corresponds to the vehicle in the traffic direction being able to accelerate in advance in the pre-acceleration zone of the vehicle, so that the vehicle speed at the intersection may be relatively high, through the intersection of the plane Time can be shortened, this mechanism can greatly improve the level Vehicle efficiency through the line of intersection, turn can lay the groundwork to ease traffic congestion. Referring to FIG. 3-a, a plane intersection traffic control system further provided by the embodiment of the present invention may include: a calculation module 310 and a release control module 320. '

The measuring module 310 is configured to calculate a distance between the lane intersection and the pre-acceleration stop line (the pre-acceleration stop line may be fixed or movable) according to the vehicle passing direction of the plane intersection. Pre-acceleration time of the vehicle, wherein the lane segment demarcated between the intersection and the pre-acceleration parking line forms a pre-acceleration zone of the vehicle;

The release control module 320 is configured to: when the first duration is left from the end of the current transit phase, the traffic light corresponding to the next transit phase of the current transit phase is displayed to display the color of the vehicle release (eg, displaying green, green, and yellow-green) Flash or other color indicating the release of the vehicle), wherein the first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next transit phase. The value of the first duration may be set according to a specific scenario. For example, if the vehicle pre-acceleration duration of the vehicle passing direction corresponding to the next transit phase is 6 seconds, the value of the first duration may be set to 6, 5.5 seconds, 5 seconds, 4 seconds or other values.

Referring to Figure 3-b, the intersection intersection traffic control system may further include: The parking line display module 330 is configured to perform a correspondence between the preset different time periods and the pre-acceleration parking line display position (for example, the pre-acceleration parking line display position corresponding to the busy time period may be preset (for example, the displayed pre-acceleration stop line) Pre-accelerated parking line display position corresponding to the semi-busy time (for example, the displayed pre-acceleration stop line is 15 meters away from the intersection or other value), and the pre-acceleration stop line display position corresponding to the idle time period (for example, display) The pre-acceleration stop line is 10 meters away from the intersection or other values), etc., for example, 7: 30-9:30, 17:30~20:00 can be designated as busy hours, 0:00~6:00 For idle time, other time periods are defined as semi-busy time. Of course, there may be other time zone division modes for different application scenarios, which are not exemplified here, or, according to preset traffic flow and pre-acceleration parking. The line shows the correspondence between the positions (for example, when the traffic volume at the intersection is greater than 100 vehicles per minute, the displayed pre-acceleration stop line is 20 meters away from the intersection or other value, when the traffic volume at the intersection For 60~100 vehicles per minute, the pre-acceleration stop line displayed is 15 meters away from the intersection or other value; when the traffic volume at the intersection is less than 30 vehicles per minute, the displayed pre-acceleration stop line is 10 meters away from the intersection or other value to In this type of push, a pre-acceleration stop line is displayed on the lane in the direction of each vehicle in the plane intersection. For example, a plurality of rows of lights may be arranged in the lane, a row of lights that are illuminated forms a pre-acceleration stop line, or a pre-acceleration stop line is formed by light projection onto the lane, or a pre-acceleration stop line is displayed by other means.

Optionally, the calculating module 310 is specifically configured to: the distance between the pre-acceleration parking line and the intersection set on the lane of the vehicle passing direction of the plane intersection, and the maximum speed limit value or the average vehicle speed of the lane segment (where The average vehicle speed may be, for example, an average vehicle speed of a normal vehicle or a premium sports car from rest to acceleration through the pre-acceleration zone, and the vehicle pre-acceleration duration of the vehicle traffic direction is calculated. Of course, the calculation module 310 can also calculate the vehicle pre-acceleration duration of the vehicle traffic direction according to the distance between the pre-acceleration parking line and the intersection set on the lane of the vehicle intersection direction of the plane intersection and other reference parameters.

In an embodiment, the measurement module 310 can obtain the average vehicle speed by, for example, real-time estimation or according to historical statistical data measurement; or different time periods can be correspondingly set for different average vehicle degrees (such as a busy time period, a semi-busy time period, and an idle time period). The different average vehicle speeds, and then the calculation module 310 can calculate the current average vehicle speed according to the current time period, or the measurement module 310 can also determine the current average vehicle speed according to the current light intensity (different light intensity ranges correspond to different average tests) Or the measurement module 310 can also determine the current average vehicle speed according to the current road surface slip degree (such as different wet slip degrees, different road surface friction forces corresponding to different average vehicle speeds); or, the measurement module 310 can also comprehensively consider the current The current average vehicle speed is calculated according to the relevant time period, the current light intensity, and the current road surface slip degree. For example, the weights of the respective related parameters may be set according to different application scenarios, and the different parameters correspond to the same or different weights, and the measuring module 310 The current average vehicle speed can be calculated by integrating various parameters. If based on this mechanism, the overall calculated vehicle speed is relatively scientific and the vehicle calculated based on the average vehicle speed is considered based on the comprehensive consideration of the impact of the complex external environment on the average speed. The pre-acceleration time is more scientific and reasonable, which is conducive to ensuring the safety and reliability of subsequent control.

In a specific implementation process, if the release control module 320 has a first time period remaining from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release. A vehicle that has a faster starting speed or a higher acceleration capability may have a problem that the vehicle with the current transit phase collides at the intersection, and this situation can be solved by avoiding the driving mechanism.

The evasive driving mechanism can be implemented in a plurality of ways. For example, the release control module 320 is specifically configured to: when the first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase indicates that the vehicle is released. The color, and the color of the traffic light (such as green flash or yellow-green flash) indicates the vehicle pass priority, which is lower than the vehicle pass priority of the current transit phase. In addition, you can change the original stop line at the intersection to the deceleration line (for example, the white double dotted line). Based on the avoidance driving mechanism, when the vehicle in the next transit phase (for example, a vehicle with a faster starting speed or a higher acceleration capability) arrives at the same time as the vehicle in the current transit phase, the vehicle passing priority in the next transit phase is lower than The current passing phase of the vehicle passes the priority, so that the vehicle in the next transit phase avoids the vehicle in the current transit phase, thus avoiding the occurrence of traffic collision.

It can be understood that the functions of the functional modules of the plane intersection traffic control system of the present embodiment can be specifically implemented by the method in the foregoing method embodiment. For the specific implementation process, reference may be made to the related description of the foregoing method embodiment, where Let me repeat.

It can be seen that, in the embodiment of the present invention, a pre-acceleration parking line is arranged on a lane in a vehicle traffic direction at a plane intersection, so that a lane segment demarcated between the intersection of the lane and the pre-acceleration parking line forms a vehicle pre-acceleration area; The intersection traffic control system calculates the vehicle pre-acceleration duration of the vehicle traffic direction according to the distance between the lane intersection of the vehicle traffic direction at the plane intersection and the pre-acceleration parking line; when the first time period is left from the end of the current traffic phase a traffic light corresponding to the next traffic phase controlling the current transit phase, indicating a color of the vehicle release, wherein the first duration is less than or equal to The vehicle pre-acceleration duration corresponding to the vehicle traffic direction corresponding to the next traffic phase, so that the next traffic phase has already started when the current traffic phase has not ended, so that the next traffic phase corresponding to the traffic in the traffic direction can be pre-vehicle The acceleration zone is accelerated in advance, so that the speed of the intersection may be relatively high when the intersection is reached, and the time of crossing the intersection can be shortened. This mechanism can greatly improve the vehicle traffic efficiency at the intersection, and thus Lay the foundation for alleviating traffic congestion.

The embodiment of the present invention further provides a computing storage medium, wherein the computing storage medium can store a program, and the program includes some or all of the steps of the planar intersection traffic control method described in the foregoing method embodiments.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the above embodiments, the descriptions of the various embodiments are different, and the details are not described in the specific embodiments. For details, refer to related descriptions of other embodiments. The steps may be completed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, and the storage medium may include: a read only memory, a random access memory, a magnetic disk or an optical disk, and the like.

The planar intersection control system and method provided by the embodiments of the present invention are described in detail. The principles and implementations of the present invention are described in the following. The description of the above embodiments is only for helping to understand the present invention. The method of the invention and its core idea; at the same time, those skilled in the art, according to the idea of the present invention, there will be changes in the specific embodiment and the scope of application. In summary, the content of the specification should not be construed as Limitations of the invention.

Claims

Rights request

A plane intersection traffic control system, characterized in that it comprises:

The calculation module is configured to calculate a pre-acceleration time of the vehicle in the direction of the vehicle according to the distance between the lane intersection and the pre-acceleration stop line in the vehicle passing direction of the plane intersection, wherein the intersection between the intersection and the pre-acceleration stop line is delimited The lane segment forms a pre-acceleration zone of the vehicle;

The plane intersection traffic control system according to claim 1, wherein the release control module is configured to control the next current phase when the first time period is left from the end of the current traffic phase. The traffic signal corresponding to the traffic phase displays the color of the vehicle release, and the vehicle traffic priority indicated by the color displayed by the traffic signal is lower than the vehicle traffic priority of the current overnight phase.

3. The intersection intersection traffic control system according to claim 1 or 2, wherein the plane intersection traffic control system further comprises:

The plane intersection traffic control system according to any one of claims 1 to 3, wherein the calculation module is specifically configured to: pre-accelerate the parking line set on the lane according to the vehicle passing direction of the plane intersection and The distance between the intersections and the maximum speed limit value or the average vehicle speed of the lane segment are used to calculate the vehicle pre-acceleration duration of the vehicle traffic direction.

5. A planar intersection traffic control system according to any one of claims 1 to 4, characterized in that

The release control module is configured to: when a first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays green, green, or yellow-green flash, where The first duration is less than or equal to the vehicle pre-acceleration duration of the vehicle traffic direction corresponding to the next transit phase.

6. A method for traffic control of a plane intersection, characterized in that it comprises:

The traffic control system calculates the pre-acceleration duration of the vehicle in the traffic direction of the vehicle according to the distance between the lane intersection of the vehicle passing direction at the plane intersection and the pre-acceleration parking line, wherein the lane delineated between the intersection and the pre-acceleration parking line The segment forms a pre-acceleration zone of the vehicle;

When the traffic control system has a first time interval from the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, wherein the first duration is less than or equal to the next traffic. The pre-acceleration duration of the vehicle in the vehicle passing direction corresponding to the phase.

7. The intersection intersection traffic control system according to claim 6, wherein the vehicle traffic priority indicated by the color displayed by the traffic signal is lower than the vehicle traffic priority of the current traffic phase.

8. The method according to claim 6 or 7, wherein the method further comprises: the traffic control system according to the preset different time period and the pre-acceleration parking line display position, or The correspondence between the preset traffic flow and the pre-acceleration stop line display position indicates that the pre-acceleration stop line is displayed on the lane of each vehicle traffic direction at the plane intersection.

9. A method according to any one of claims 6 to 8, characterized in that

The distance between the lane intersection and the pre-acceleration stop line in the vehicle passing direction of the plane intersection is measured, and the vehicle pre-acceleration duration of the vehicle passing direction is measured, including:

The pre-acceleration time of the vehicle in the traffic direction of the vehicle is calculated according to the distance between the pre-acceleration stop line and the intersection set in the lane of the vehicle passing direction at the plane intersection and the maximum speed limit value or the average vehicle speed of the lane segment.

10. A method according to any one of claims 6 to 9, characterized in that

When the first time period is left from the end of the current traffic phase, the traffic signal corresponding to the next traffic phase controlling the current traffic phase displays the color of the vehicle release, including: when the first time period is left from the end of the current traffic phase, The traffic light corresponding to the next pass phase controlling the current transit phase displays green, green flash or yellow-green flash.

11. A computer storage medium, characterized in that

The computer storage medium stores a program, and the program execution includes the steps of any one of claims 6 to 10.