CN109087519B - Joint control intersection traffic signal scheme stage division and green time configuration method - Google Patents
Joint control intersection traffic signal scheme stage division and green time configuration method Download PDFInfo
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- CN109087519B CN109087519B CN201810914256.1A CN201810914256A CN109087519B CN 109087519 B CN109087519 B CN 109087519B CN 201810914256 A CN201810914256 A CN 201810914256A CN 109087519 B CN109087519 B CN 109087519B
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Abstract
The invention provides a method for segmenting traffic signal schemes of joint control intersections and configuring green time, which is characterized in that on the basis of acquiring and configuring basic information, signal schemes of two intersections of a 'one-to-two' joint control intersection are respectively configured, phase stages are re-segmented, and green light time of each stage is configured; the method of the invention provides a method for optimizing the green light duration of each stage by respectively configuring the phase sequence of two intersections and summarizing the phases according to the time plan, and compared with a timing method that two intersections must be considered simultaneously in the scheme of 'one-to-two' joint control signal machine in the current stage, the method greatly improves the convenience and efficiency of configuration, and enables personnel in the department of public security traffic management to configure by themselves.
Description
Technical Field
The invention relates to a method for traffic signal scheme stage division and green time configuration at a joint control intersection.
Background
With the acceleration of the urbanization process and the continuous improvement of the living standard of people, the conservation quantity of motor vehicles in China is in the trend of increasing year by year, the problem of traffic jam of more and more large and medium-sized cities is increasingly serious, and the traffic signal control system is continuously applied and implemented in each large city. However, as the urbanization process is accelerated, traffic signal control intersections are gradually increased, and in order to save resources and improve the signal control efficiency, more and more cities control two adjacent intersections by the same signal controller, but the management of the one-driving-two joint control traffic intersection lacks effective management means and phase configuration methods.
At present, a signal control professional team generally carries out specialized configuration on a 'one-driving-two' and other joint control intersections, so that the monitoring of a traffic signal scheme by a public security traffic management department is inconvenient, and the later-stage optimization management is also inconvenient. In order to effectively solve the problem that a public security traffic control department cannot configure a 'one-to-two' joint control intersection signal scheme by self, an intersection scheme configuration optimization tool of a joint control signal machine of an unconventional intersection is urgently needed to be added in an existing traffic signal scheme ledger management system.
At present, when a signal control professional team configures a traffic signal scheme of a 'one-to-two' intersection, two intersections are regarded as one intersection to be configured according to intersection traffic conditions, lamp bank parallel information and intersection canalization characteristics, and the configuration method is complex and has high specialization degree.
Disclosure of Invention
The invention aims to provide a method for segmenting traffic signal schemes of joint control intersections and configuring green time, which is characterized in that on the basis of respectively configuring the traffic signal schemes of two intersections through traffic flow data, phase stages and phase sequences of the joint control intersections and the duration of green lights in each stage are optimally configured according to parallel connection lamp group information and the direction of converging a connection road section into an evacuation traffic flow, so that the problem of traffic jam of the connection road section is effectively avoided, the road traffic passing efficiency is improved, meanwhile, a method for configuring the two-intersection signal schemes of a one-to-two traffic signal machine is provided for a public security traffic control department, the configuration by a professional team is not needed, and the configuration efficiency of the signal schemes is improved.
The technical solution of the invention is as follows:
a method for segmenting traffic signal schemes of joint control intersections and configuring green time comprises the following steps of respectively configuring the signal schemes of two intersections of a 'one-to-two' joint control intersection on the basis of acquiring and configuring basic information, re-segmenting phase stages and configuring the green light time length of each stage,
s1, acquiring and configuring basic information, acquiring intersection characteristic information, traffic flow data and signal lamp group information of the one-driving-two joint control intersection, and configuring an intersection passing phase;
s2, configuring a signal scheme, wherein the number of phase stages of two intersections, the phase sequence, the release direction of each stage and the period duration are respectively configured according to traffic flow data, wherein the signal period durations of the two intersections of the joint control intersection are required to be consistent;
s3, according to the parallel connection condition of the traffic signal light groups at the joint control intersection, the phase phases of the parallel connection light groups correspond to each other; if the lamp groups at the two intersections have the condition of parallel connection, corresponding phase stages corresponding to the parallel connection lamp groups; otherwise, the default is that the lamp group is connected with one lamp and one line independently, the step is directly skipped, and the next step S4 is carried out;
s4, comparing the signal schemes of the two intersections, and subdividing the signal scheme stages in the period;
s5, limiting the maximum green light duration of the conflict stage, judging the phase position, namely the traffic direction, in each stage of the signal scheme based on the intersection shape canalization characteristics and the connection direction of the two intersections, and limiting the maximum green light duration of the conflict stage with no evacuation converged in the 'one-light-one-line'; otherwise, directly turning to the next step S6 without time limit;
and S6, optimizing the configuration of each extreme green duration according to the green duration limit obtained in the step S5.
Further, in step S1, specifically,
s11, collecting intersection characteristic information, including channelized information of the joint control intersection, intersection connection direction and connection road section distance;
s12, binding vehicle detector equipment of the joint control intersection, and accessing traffic flow data collected by the vehicle detector equipment;
s13, collecting the signal lamp group information of the two intersections, including the lamp group type, the wiring channel and the terminal;
s14, the traffic phases which can be set at the two intersections are configured respectively, the traffic phases specifically comprise phase names, lamp group information, yellow flashing lamp duration, full red lamp duration, shortest green lamp duration and longest green lamp duration, and phase management is provided for special signals including buses, special services and self definition.
Further, step S2 is to access traffic flow data collected by two front vehicle detectors at the intersection, divide a control time period according to the traffic flow data, and configure a signal period duration and a green light duration at each stage in each time period.
Furthermore, while the green light time length is configured, the green time demand value at each stage, namely the shortest green light time length, is given according to traffic flow data in each direction.
Further, in step S3, if the lamp groups at the two intersections have a parallel connection, the green light durations at the stage of the two intersections are adjusted to be consistent, the phase sequence of the other stages is adjusted, the green light durations at the stages are optimized according to the parallel connection stage on the basis of a certain period, and the adjustment meets the shortest green light duration given in step S2.
Further, in step S4, the dividing principle of re-dividing the signal scheme stages in the period is as follows, the period start time and the period end time of the two intersection signals are corresponded, and if there is an intersection phase change in the two-intersection signal scheme, a stage dividing node is defaulted.
Further, in step S5, the maximum value of the green time duration of the conflict phase without merging into the evacuation in the "one lamp one line" is limited, specifically,
s51, if there is a merging flow direction in the non-connected section in the signal stage of the intersection and there is no corresponding evacuation phase in the same signal stage of another intersection, the green time length in the time period needs to be limited, that is, the green time length in the time period needs to be limited
In the formula, gmaxThe maximum green time, L the distance of the connecting road section, and V the expected minimum speed;
s52, in order to avoid the traffic jam on the connection section caused by the conflict stage, the green time duration in the stage should be less than the maximum green time duration limit in the time period, that is
Ti≤gmax
Wherein i is the number of successive stages, TiThe period of the stage green light is;
meanwhile, if the continuous multiple stages are conflict stages with input and no evacuation, then
∑Ti≤gmax；
S53, in order to avoid logic disorder of the signal caused by the fact that the yellow light time length and the full red time length span two stages, the green light time length of the stage is larger than the green light interval time, namely the sum of the yellow light time length and the full red time length of the passing phase, namely
Ti≥tred+tyellow
In the formula, tredFor passing phase full red duration, tyellowIs yellow light duration.
Further, in step S6, if there is a conflict phase and the green duration is greater than the conflict maximum green duration limit, the green duration is decreased to the maximum green duration limit value.
The invention has the beneficial effects that:
the method for traffic signal scheme stage division and green time configuration of the joint control intersection innovatively applies a trunk line coordination thought to the 'one-driving-two' joint control intersection, identifies the direction of the connection road section converging and evacuating traffic flows according to intersection characteristics and connection directions, and performs coordination analysis by taking the evacuating traffic flows as targets. Compared with the traditional main line coordination, the method only carries out coordination optimization on the traffic flow of the main road, simultaneously considers the turning traffic flow, and avoids the traffic jam of the connection road section, particularly the short-distance connection road section.
The invention provides a method for optimizing the green light duration of each stage by respectively carrying out phase sequence configuration on two intersections and summarizing the phases according to time division, and compared with a timing method that two intersections must be considered simultaneously in the scheme of 'one-to-two' joint control signal machine in the current stage, the convenience and the efficiency of configuration are greatly improved, and personnel in the department of public security traffic can configure the system by themselves.
Drawings
Fig. 1 is a flow chart of a method for joint control intersection traffic signal scheme segmentation and green time configuration according to an embodiment of the invention.
Fig. 2 is a schematic diagram of channelized shape information of intersection a and intersection B in the embodiment.
Fig. 3 is a signal timing chart of intersection a and intersection B in the embodiment.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Examples
Aiming at the problem that two intersections are set as the same intersection for signal scheme configuration by a signal control professional team in the 'one-driving-two' joint control intersection signal scheme at the present stage, the embodiment provides a joint control intersection traffic signal scheme stage division and green time configuration method.
A method for segmenting traffic signal schemes of joint control intersections and configuring green time comprises the following steps of respectively configuring the signal schemes of two intersections on the basis of acquiring and configuring basic information, re-segmenting phase stages, and configuring green light time of each stage, as shown in figure 1:
s1, basic information acquisition and configuration, namely acquiring intersection characteristic information, traffic flow data and signal lamp group information of a one-driving-two joint control intersection and configuring an intersection passing phase.
And S11, collecting intersection characteristic information. Channelized information (intersection shape, to-be-transferred area, pedestrian crossing, separation zone, lane number and the like), intersection connection direction and connection road section distance of the joint control intersection are obtained.
And S12, binding the vehicle detector equipment at the joint control intersection, and accessing the traffic flow data collected by the vehicle detector equipment.
And S13, acquiring the signal lamp group information of the two intersections, including the lamp group type, the wiring channel and the terminal.
S14, the settable passing phases of the two intersections are configured respectively, and the settable passing phases specifically comprise phase names, lamp group information, yellow flashing lamp duration, full red lamp duration, shortest green lamp duration and longest green lamp duration. Meanwhile, phase management is provided for special signals such as buses, special services, custom and the like.
And S2, configuring a signal scheme. And respectively configuring the number of phase stages, the phase sequence, the releasing direction of each stage and the period duration of the two intersections according to the traffic flow data. Wherein, because the intersection is jointly controlled, the signal cycle duration of two intersections must be consistent.
The method comprises the following steps of accessing traffic flow data collected by front-end vehicle detectors at two intersections, dividing control time periods according to the traffic flow data, and configuring signal cycle time length and green light time length of each phase in each time period. Generally, the green time demand value (the shortest green time) at each stage is given according to traffic flow data in each direction while the green time is configured.
And S3, corresponding the phase phases of the parallel connection according to the parallel connection of the traffic signal lamp groups of the joint control intersection.
If the lamp groups at the two intersections have the condition of parallel connection, the phase stages corresponding to the parallel connection lamp groups are corresponding, the green lamp duration of the stage at the two intersections is adjusted to be consistent, the phase sequence of the other stages is adjusted, the green lamp duration of each stage is optimized according to the parallel connection stage on the basis of a certain period (the adjustment meets the shortest green lamp duration given in the step S2), and otherwise, the step is directly skipped by default 'one lamp and one line' connection method. Generally, the parallel lamp group stage is released first.
And S4, comparing the signal schemes of the two intersections, and subdividing the signal scheme stages in the period. The dividing principle is as follows, the period starting time and the period ending time of two signals are corresponding, if one intersection phase change exists in the two-intersection signal scheme, the two-intersection signal scheme is defaulted to be a stage dividing node, and if the intersection A is changed into the second phase stage and the intersection B is still the first phase stage, the time period from the time when the intersection A is changed into the second phase stage to the time when the intersection B is changed into the second phase stage is defaulted to be the second stage.
S5, judging the phase (passing direction) in each stage of the signal scheme based on the intersection shape canalization characteristics and the connection direction of the two intersections, limiting the maximum green light duration value of the conflict stage without evacuation in the first line of one light, and directly turning to the next step S6 if the maximum green light duration value is not limited;
s51, if the non-connected road section in the signal stage of the intersection has an incoming flow direction and the other intersection does not have a corresponding evacuation phase in the same signal stage, limiting the green light duration of the time period, namely
In the formula, gmaxThe maximum green time, L the distance of the connecting road section, and V the expected minimum speed; generally, V is determined by intersection channeling and historical vehicle minimum speed.
S52, in order to avoid the traffic jam on the connecting road section caused by the conflict stage, the green light duration in the stage is less than the maximum green light duration limit in the time period, namely
Ti≤gmax
Wherein i is the number of successive stages, TiA period of green light.
Meanwhile, if the continuous multiple stages are conflict stages with input and no evacuation, then
∑Ti≤gmax
S53, in order to avoid logic disorder of the annunciator caused by the fact that the yellow light time length and the full red time length span two stages, the green light time length in the stage is larger than the green light interval time (the sum of the yellow light time length and the full red time length of the passing phase), namely
Ti≥tred+tyellow
In the formula, tredFor passing phase full red duration, tyellowThe yellow duration is obtained from the settable traffic phase information configured in step S13.
S6, carrying out configuration optimization on each extreme green light time length according to the green light time length limit obtained in the step S5.
Specifically, if a conflict phase exists in a phase and the green time is greater than the conflict maximum green time limit, the green time is reduced to the maximum green time limit value.
In the embodiment, the parallel connection line, namely two signal lamp groups are connected to the same signal terminal, namely the two signal lamp groups are required to be lighted at the same time. The "one-lamp-one-line" or signal lamp group is individually connected to one signal terminal.
According to the method for the traffic signal scheme stage division and green time configuration of the joint control intersection, a trunk line coordination thought is innovatively applied to the 'one-driving-two' joint control intersection, the direction of the traffic flow converging and evacuating of a connecting road section is identified according to intersection characteristics and the connecting direction, and coordination analysis is carried out by taking the evacuating traffic flow as a target. Compared with the traditional main line coordination, the method only carries out coordination optimization on the traffic flow of the main road, simultaneously considers the turning traffic flow, and avoids the traffic jam of the connection road section, particularly the short-distance connection road section.
The embodiment method provides a method for optimizing the green light duration of each stage by respectively carrying out phase sequence configuration on two intersections and summarizing the phases according to time division, and compared with a time distribution method in which two intersections must be considered simultaneously in the scheme of 'one-to-two' joint control signal machine in the current stage, the convenience and the efficiency of configuration are greatly improved, and personnel in a public security traffic department can carry out self-configuration.
One specific example of an embodiment is as follows:
s1, an intersection A of an X1 road and a Y road and an intersection B of an X2 road and a Y road exist on a Y road section of a certain city, wherein the intersection A and the intersection B are crossroads and are connected, the distance between the two roads is only 220m, and specific canalization shape information is shown in figure 2.
And collecting traffic flow data based on the step S12, and carrying out configuration management on the conventional traffic phases which can be set at two intersections based on the step S13, wherein the traffic phases which can be set at the two intersections are 16 groups of phases.
S2, configuring phase stages, phase sequences and cycle durations of the intersection A and the intersection B based on traffic flow data, and specifically comprising the following steps:
meanwhile, the lowest green time of each stage is given according to traffic flow data in each direction, and the method specifically comprises the following steps:
| number of stages | Crossing A(s) | Crossing B(s) |
| 1 | 30 | 30 |
| 2 | 20 | 15 |
| 3 | 40 | 30 |
| 4 | 18 |
And S3, corresponding the parallel lamp groups according to the lamp group wiring information, wherein the south cake lamps at the intersection A and the intersection B are connected in parallel, and the green lamp durations at the direction stage of the intersection A and the south cake lamps at the intersection B are required to be the same and consistent. In order to meet the passing requirement of the intersection A, the green light duration of the south-north straight-going stage of the intersection B is adjusted (increased), the green light duration of the subsequent stage is compressed to the lowest green time, and the green light duration of each stage is 38s, 20s, 32s and 22s after adjustment.
S4, in order to facilitate the comparison of the signal phase stages of the intersection A and the intersection B, a signal timing diagram is drawn, as shown in FIG. 3, specifically as follows, and the intersection signal scheme is divided into 5 stages.
S5, identifying the traffic flow direction in the signal stage of one light and one line (the second stage to the fifth stage):
and a second stage: intersection A and intersection B are turned left to the south and north, and congestion of a connecting road section can be caused, so that the maximum green light duration of the second stage meets gmax(intersection A and B are 220 meters apart and the desired is setThe lowest speed V is 10m/s, then gmaxIs 22 s);
and a third stage: the intersection A turns left in the south and north, the intersection B moves straight, wherein the straight-going vehicles in the east have no evacuation direction at the intersection B, and the maximum green light duration in the third stage also meets gmax；
And a fourth stage: the crossing A is an object-to-object direction passing, the crossing B is an object-to-object straight-going crossing, the conflict situation that the vehicle is merged into but not evacuated does not exist, and meanwhile, the vehicle merged into in the third stage is evacuated;
and a fifth stage: the crossing A is the opposite-direction passing of things, the crossing B is the left-turn of things, and the conflict condition that the things are converged and are not evacuated does not exist.
Furthermore, because there is conflict between the second stage and the third stage, the green duration of the second stage and the third stage should be less than gmaxAnd the total duration of phase three is greater than the green interval (5 s).
S6, configuring a road signal scheme according to the limiting conditions of the step S5 and the lowest green-time requirement given in the step S2, wherein the direction release and green light duration of each stage are as follows:
Claims (3)
1. a method for traffic signal scheme stage division and green time configuration at a joint control intersection is characterized by comprising the following steps: on the basis of basic information acquisition and configuration, respectively configuring signal schemes of two intersections of a one-to-two joint control intersection, dividing a phase stage again, and configuring green light duration of each stage, wherein the method comprises the following steps:
s1, acquiring and configuring basic information, acquiring intersection characteristic information, traffic flow data and signal lamp group information of the one-driving-two joint control intersection, and configuring an intersection passing phase;
s2, configuring a signal scheme, wherein the number of phase stages of two intersections, the phase sequence, the release direction of each stage and the period duration are respectively configured according to traffic flow data, wherein the signal period durations of the two intersections of the joint control intersection are required to be consistent; step S2 is concretely, traffic flow data collected by two front vehicle detectors at intersections are accessed, control time intervals are divided according to the traffic flow data, and signal cycle duration and green light duration of each stage in each time interval are configured; setting a green time demand value at each stage, namely the shortest green light time according to traffic flow data in each direction while configuring the green light time;
s3, according to the parallel connection condition of the traffic signal light groups at the joint control intersection, the phase phases of the parallel connection light groups correspond to each other; if the lamp groups at the two intersections have the condition of parallel connection, corresponding phase stages corresponding to the parallel connection lamp groups; otherwise, the default is that the lamp group is connected with one lamp and one line independently, the step is directly skipped, and the next step S4 is carried out; in step S3, if the lamp groups at the two intersections have the condition of parallel connection, the green lamp duration of the stage at the two intersections is adjusted to be consistent, the phase sequence of the other stages is adjusted, the green lamp duration of each stage is optimized according to the parallel stage on the basis of a certain period, and the adjustment meets the shortest green lamp duration given in step S2;
s4, comparing the signal schemes of the two intersections, and subdividing the signal scheme stages in the period; in step S4, the principle of dividing the signal scheme stages in the re-division cycle is as follows, the cycle start time and the cycle end time of the two intersection signals are corresponded, if there is an intersection phase change in the two-intersection signal scheme, a stage division node is defaulted;
s5, limiting the maximum green light duration of the conflict stage, judging the phase position, namely the traffic direction, in each stage of the signal scheme based on the intersection shape canalization characteristics and the connection direction of the two intersections, and limiting the maximum green light duration of the conflict stage with no evacuation converged in the 'one-light-one-line'; otherwise, directly turning to the next step S6 without time limit;
s6, optimizing the configuration of each extreme green light duration according to the green light duration limit obtained in the step S5; step S6 is specifically to reduce the green light duration to the maximum green light duration limit value if there is a conflict phase and the green light duration is greater than the conflict maximum green light duration limit in the phase.
2. The method for joint control intersection traffic signal scheme segmentation and green time configuration according to claim 1, characterized in that: in step S1, specifically, the step,
s11, collecting intersection characteristic information, including channelized information of the joint control intersection, intersection connection direction and connection road section distance;
s12, binding vehicle detector equipment of the joint control intersection, and accessing traffic flow data collected by the vehicle detector equipment;
s13, collecting the signal lamp group information of the two intersections, including the lamp group type, the wiring channel and the terminal;
s14, the traffic phases which can be set at the two intersections are configured respectively, the traffic phases specifically comprise phase names, lamp group information, yellow flashing lamp duration, full red lamp duration, shortest green lamp duration and longest green lamp duration, and phase management is provided for special signals including buses, special services and self definition.
3. The method for joint control intersection traffic signal scheme segmentation and green time configuration according to claim 1, characterized in that: in step S5, the maximum value of the duration of the green lights in the conflict stage of no merging into the first line of lights is limited, specifically,
s51, if there is a merging flow direction in the non-connected section in the signal stage of the intersection and there is no corresponding evacuation phase in the same signal stage of another intersection, the green time of the stage needs to be limited, that is, the green time of the stage is limited
In the formula, gmaxThe maximum green time, L the distance of the connecting road section, and V the expected minimum speed;
s52, in order to avoid the traffic jam on the connection section caused by the conflict stage, the green time duration in the stage should be less than the maximum green time duration limit in the time period, that is
Ti≤gmax
Wherein i is the number of successive stages, TiThe period of the stage green light is;
meanwhile, if the continuous multiple stages are conflict stages with input and no evacuation, then
∑Ti≤gmax；
S53, in order to avoid logic disorder of the signal caused by the fact that the yellow light time length and the full red time length span two stages, the green light time length of the stage is larger than the green light interval time, namely the sum of the yellow light time length and the full red time length of the passing phase, namely
Ti≥tred+tyellow
In the formula, tredFor passing phase full red duration, tyellowIs yellow light duration.
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