CN110992716A - Method for realizing tramcar priority control processing based on traffic state and vehicle running state - Google Patents
Method for realizing tramcar priority control processing based on traffic state and vehicle running state Download PDFInfo
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- CN110992716A CN110992716A CN201911338710.4A CN201911338710A CN110992716A CN 110992716 A CN110992716 A CN 110992716A CN 201911338710 A CN201911338710 A CN 201911338710A CN 110992716 A CN110992716 A CN 110992716A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
- G08G1/087—Override of traffic control, e.g. by signal transmitted by an emergency vehicle
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/065—Traffic control systems for road vehicles by counting the vehicles in a section of the road or in a parking area, i.e. comparing incoming count with outgoing count
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Abstract
The invention relates to a method for realizing priority control processing of a tramcar based on a traffic state and a vehicle running state, which comprises the following steps: the signal machine acquires video detection data when the tramcar reaches a first position, and acquires the running state of the tramcar; calculating the congestion index of the lane according to the flow and the time occupancy of each lane of the conflict road section; judging whether vehicles overflow from an exit road of a conflict road section of the detected intersection, if so, giving no priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the bottleneck road section entrance lane congestion index, and outputting a corresponding priority strategy. The method for realizing the priority control processing of the tramcar based on the traffic state and the vehicle running state belongs to a real-time priority strategy, can reduce the public traffic passing delay and simultaneously reduce the interference on social vehicles to the maximum extent, and is favorable for relieving the traffic jam of the crossed road sections in the running direction of the tramcar in the vehicle peak period.
Description
Technical Field
The invention relates to the field of traffic control, in particular to the field of intelligent traffic signal control systems, and specifically relates to a method for realizing priority control processing of a tramcar based on a traffic state and a vehicle running state.
Background
Modern tramcars are gradually favored by more and more cities, and the development of urban public transport is the best way for solving the urban traffic problem mainly due to the characteristics of large transportation capacity, low energy consumption, small pollution and the like, so that certain priority is necessarily given to the passing of tramcars by various measures, and the timeliness, the convenience and the comfort of tramcars are ensured.
In 2018, tramcar lines T1 and T2 in the Shanghai Songjiang area are basically constructed, tramcar lines pass through old city areas and key commercial districts in cities, and traffic jam easily occurs on the tramcar lines crossing main roads in the cities in the morning and evening of social vehicle traveling. Under such a background, it is necessary to study a priority control method for trams in an important area (an old city area, an important commercial area). Generally speaking, the tramcar signal priority control method mainly comprises a passive priority strategy, an active priority strategy and a real-time priority strategy, the method belongs to the field of real-time priority strategies, the current traffic situation on a road is mainly acquired through road section traffic acquisition equipment, and the tramcar is given priority to pass on the premise of considering the passing requirements of social vehicles.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the method for realizing the priority control processing of the tramcar based on the traffic state and the vehicle running state, which has the advantages of high accuracy, small error and wide application range.
In order to achieve the above object, the method of the present invention for implementing a priority control process of a tram based on a traffic state and a vehicle running state is as follows:
the method for realizing the priority control processing of the tramcar based on the traffic state and the vehicle running state is mainly characterized by comprising the following steps of:
(1) the signal machine acquires video detection data when the tramcar reaches a first position, and acquires the running state of the tramcar;
(2) calculating the congestion index of the lane according to the flow and the time occupancy of each lane of the conflict road section;
(3) judging whether vehicles overflow from an exit road of a conflict road section of the detected intersection, if so, giving no priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the bottleneck road section entrance lane congestion index, and outputting a corresponding priority strategy.
Preferably, the calculating the congestion index of the lane in the step (2) includes:
calculating a congestion index of the lane according to the following formula:
wherein, index is the intersection lane index, a1, a2, a3 and a4 are all weight coefficients, flow is the flow, and ocul is the maximum lane occupancy.
Preferably, the video detection data in step (1) includes a lane number, a traffic volume, a lane occupancy and a time.
Preferably, the scheme matrix table in step (3) includes a primary trunk priority policy and a secondary trunk and branch priority policy.
The method for realizing the priority control processing of the tramcar based on the traffic state and the vehicle running state belongs to a real-time priority strategy, mainly obtains the current traffic situation on the road through road section traffic acquisition equipment, and gives priority right to the tramcar on the premise of considering the social vehicle traffic demand. The optimal signal control strategy is generated by comprehensively studying and judging the traffic state and the vehicle running state of the road section of the crossing where the tramcar passes through and combining with the formulated priority control strategy scheme matrix table, and the standard point rate of the tramcar is ensured as much as possible. The invention provides a method for grading the congestion condition of a tramcar conflict phase, such as smooth, basically smooth, light congestion, moderate congestion and severe congestion, and can provide bottom data support for displaying the traffic state of an intersection in an upper platform system.
Drawings
Fig. 1 is a flowchart of a method for implementing a priority control process for a tram based on a traffic state and a vehicle running state according to the present invention.
Fig. 2 is a schematic tram running diagram of the method for implementing tram priority control processing based on traffic state and vehicle running state.
Fig. 3 is a schematic view of traffic data acquisition of the method for implementing priority control processing of the tramcar based on the traffic state and the vehicle running state.
Detailed Description
In order to more clearly describe the technical contents of the present invention, the following further description is given in conjunction with specific embodiments.
As shown in fig. 1, the method for implementing priority control processing of the tram based on the traffic state and the vehicle running state of the invention comprises the following steps:
(1) the signal machine acquires video detection data when the tramcar reaches a first position, and acquires the running state of the tramcar;
(2) calculating the congestion index of the lane according to the flow and the time occupancy of each lane of the conflict road section;
(3) judging whether vehicles overflow from an exit road of a conflict road section of the detected intersection, if so, giving no priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the bottleneck road section entrance lane congestion index, and outputting a corresponding priority strategy.
As a preferred embodiment of the present invention, the step (2) of calculating the congestion index of the lane specifically includes:
calculating a congestion index of the lane according to the following formula:
wherein, index is the intersection lane index, a1, a2, a3 and a4 are all weight coefficients, flow is the flow, and ocul is the maximum lane occupancy.
As a preferred embodiment of the present invention, the video detection data in step (1) includes a lane number, a traffic volume, a lane occupancy, and a time.
As a preferred embodiment of the present invention, the scheme matrix table in step (3) includes a primary trunk priority policy and a secondary trunk and branch priority policy.
In the embodiment of the invention, as shown in fig. 2, when the tramcar reaches the position P1 and sends a request to the intersection traffic signal, whether priority is given to the tramcar is comprehensively determined according to whether the current running time of the tramcar is advanced, whether the tramcar is delayed and the congestion condition of a conflict road section. Firstly, calculating the congestion index of an entrance road of a conflict road section (a road section which is not passed by the tramcar at the intersection), and outputting a corresponding priority strategy through the classification of the congestion index of the entrance road and the table look-up of the running state of the tramcar.
The input data of the present invention includes:
1. original data of signal machine
The signal machine original data comprises: the crossing ID that tram passed, signal phase, phase timing t, the phase place that is correlated with tram and is gone on, the phase place that is irrelevant with tram.
Table 1 signaller raw data
2. Video detection device raw data
As shown in fig. 3, the flow rate, the time occupancy, the ID of the link, the lane number, and the like at the intersection passed by the tram and the position of the lane detector ABCD are acquired.
Table 2 raw data of video inspection equipment
The output data of the invention are as follows:
firstly, detecting whether vehicles overflow from an exit road of an intersection conflict road section, and if so, not giving priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the conflict road section entrance lane congestion index, and outputting a corresponding priority strategy.
Basis of scheme matrix table: and (3) determining the congestion index of the inlet road of the bottle conflict road section (0-4 represents that the road section is smooth, 4-6 represents that the road section is lightly congested, 6-8 represents that the road section is moderately congested, and 8-10 represents that the road section is severely congested) and the running state of the tramcar together. The preference, non-preference and absolute preference can be defined by the tram manufacturer protocol.
TABLE 3 Main Lane priority policy
TABLE 4 priority strategy for trunk and branch
The detailed steps of the specific flow of the tramcar priority control of the invention are as follows:
step 1: and initializing a program when the signaler synchronizes time.
Step 2: when the tramcar reaches the position P1, reading the intersection ID, the conflict road section ID and the conflict road section video detection data (lane number lane, traffic flow F, lane occupancy Rt and time).
And step 3: and calculating the congestion index of the lane according to the flow and the time occupancy of each lane of the conflict road section.
index is the intersection lane index, a1, a2, a3 and a4 are all weight coefficients, flow is the flow, and ocul is the maximum occupancy of the lane.
And 4, step 4: firstly, detecting whether vehicles overflow from an exit road of a conflict road section of an intersection, and if so, not giving priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the bottleneck road section entrance lane congestion index, and outputting a corresponding priority strategy.
And 5: and sending the corresponding priority control strategy to the annunciator for execution.
The tramcar priority control method of the invention grades the jam condition of the tramcar conflict phase, such as smooth, basically smooth, light congestion, moderate jam and serious jam, combines the running state of the tramcar passing the request position, comprehensively analyzes and judges whether to give the tramcar a passing priority, and ensures the standard point rate of the tramcar as much as possible under the condition of ensuring the normal running of the tramcar at the intersection. And the traffic jam of the crossed road section in the running direction of the tramcar is favorably relieved in the vehicle peak time.
The method for realizing the priority control processing of the tramcar based on the traffic state and the vehicle running state belongs to a real-time priority strategy, mainly obtains the current traffic situation on the road through road section traffic acquisition equipment, and gives priority right to the tramcar on the premise of considering the social vehicle traffic demand. The optimal signal control strategy is generated by comprehensively studying and judging the traffic state and the vehicle running state of the road section of the crossing where the tramcar passes through and combining with the formulated priority control strategy scheme matrix table, and the standard point rate of the tramcar is ensured as much as possible. The invention provides a method for grading the congestion condition of a tramcar conflict phase, such as smooth, basically smooth, light congestion, moderate congestion and severe congestion, and can provide bottom data support for displaying the traffic state of an intersection in an upper platform system.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (4)
1. A method for realizing priority control processing of a tramcar based on traffic state and vehicle running state is characterized by comprising the following steps:
(1) the signal machine acquires video detection data when the tramcar reaches a first position, and acquires the running state of the tramcar;
(2) calculating the congestion index of the lane according to the flow and the time occupancy of each lane of the conflict road section;
(3) judging whether vehicles overflow from an exit road of a conflict road section of the detected intersection, if so, giving no priority to the tramcar; otherwise, searching a scheme matrix table according to the tramcar running state and the bottleneck road section entrance lane congestion index, and outputting a corresponding priority strategy.
2. The method for realizing tram priority control processing based on traffic state and vehicle running state as claimed in claim 1, wherein the congestion index of the lane is calculated in step (2), specifically:
calculating a congestion index of the lane according to the following formula:
wherein, index is the intersection lane index, a1, a2, a3 and a4 are all weight coefficients, flow is the flow, and ocul is the maximum lane occupancy.
3. The method for implementing tram priority control processing based on traffic status and vehicle operating status as claimed in claim 1, wherein the video detection data in step (1) comprises lane number, traffic flow, lane occupancy and time.
4. The method for implementing tram priority control processing based on traffic status and vehicle operating status as claimed in claim 1, wherein the scheme matrix table in step (3) comprises a primary road priority strategy and a secondary road and branch priority strategy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911338710.4A CN110992716A (en) | 2019-12-23 | 2019-12-23 | Method for realizing tramcar priority control processing based on traffic state and vehicle running state |
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| CN201911338710.4A CN110992716A (en) | 2019-12-23 | 2019-12-23 | Method for realizing tramcar priority control processing based on traffic state and vehicle running state |
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Cited By (2)
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| CN114155712A (en) * | 2021-12-14 | 2022-03-08 | 阿波罗智联(北京)科技有限公司 | Control method, device and system of traffic signal lamp |
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Application publication date: 20200410 |