CN106056907B - Subway work area road traffic control method - Google Patents

Abstract

The invention discloses a road traffic control method in a subway construction area, which includes the following steps: S1: investigate and analyze the traffic on the construction road section; S2: determine whether the construction road section needs traffic improvement according to the investigation and analysis results; S3: when the traffic needs to be improved, Investigate the road conditions of the parallel sections of the construction section; S4: Select a parallel section to ease the traffic flow of the construction section; S5: Install traffic indicating devices on the construction section and the parallel section; S6: Induce and divert the traffic flow of the construction section to the parallel section through the traffic indicating device Road section; S7: Coordinate and control the timing of all traffic lights on parallel road sections to control traffic flow. According to the investigation and analysis of road section characteristics, traffic flow characteristics and traffic signal control characteristics in the construction area, the present invention uses a variable information display screen to guide the traffic flow of the construction road section to the diverted parallel road section, and then controls the phase of the green light according to the characteristics of the diverted parallel road section. Realize traffic flow control at multi-intersections on parallel road sections that diverge traffic.

Description

Road traffic control method in subway construction area

technical field

The invention relates to the field of subway construction traffic management, in particular to a road traffic control method in a subway construction area.

Background technique

Urban traffic congestion has promoted the continuous development of urban subway construction, and many cities are undergoing large-scale subway construction. Subway construction lines are generally distributed in a "belt shape". The area occupied by subway construction is larger than that of ordinary construction roads. Traffic congestion points are often distributed around the construction section of the station. Ribbon" feature. At present, the characteristics of subway construction and the traffic guidance and control methods in the surrounding areas have not been paid enough attention to by everyone, resulting in problems such as traffic congestion and frequent traffic accidents in the subway construction section area that have not been effectively resolved.

The subway construction period is longer than the general road construction period. During the construction period, it has a great impact on the urban ground traffic. The subway construction needs to occupy road and intersection resources, which will inevitably reduce the traffic capacity of the surrounding road sections and intersections, and will cause related road sections and intersections. The traffic flow is not running smoothly, which has a great impact on the normal passage of vehicles along the subway construction line. Therefore, reasonable and efficient traffic guidance and control around the subway construction can not only ensure the progress and quality of the subway construction, but also relieve the traffic pressure in the "belt" construction section area and ensure the traffic safety in the subway construction section area.

Contents of the invention

The purpose of the invention is to overcome the deficiencies of the prior art and provide a road traffic control method in a subway construction area.

The technical scheme adopted in the present invention is:

A road traffic control method in a subway construction area, comprising the following steps:

S1: Investigate and analyze the traffic on the construction section,

S2: According to the investigation and analysis results, determine whether the construction section needs traffic improvement;

S3: When the traffic needs to be improved, investigate the road conditions of the parallel road sections to be selected in the construction road section;

S4: Select a parallel road section to ease the traffic flow of the construction road section;

S5: Install traffic indicating devices on construction road sections and parallel road sections;

S6: divert the traffic flow of the construction road section to the parallel road section through the traffic indication device;

S7: Coordinate and control the timing of all traffic lights on parallel road sections to control traffic flow.

The traffic survey on the construction section in the step S1 includes surveys on road characteristics, traffic flow characteristics and signal control characteristics.

The step S5 specifically includes setting a first variable information induction display screen at the entrance of each intersection of the parallel road section; and setting a second variable information induction display screen at the entrance of each intersection of the construction road section.

The first variable information induction display screen displays the optimal speed per hour of the parallel section in real time.

The second variable information induction display screen displays in real time the speed limit value in the trunk direction of the construction road section and the optimal speed per hour value of the parallel road section.

The traffic flow control in step S7 includes three different control modes for morning rush hour, evening rush hour and normal hour respectively.

Described step S7 specifically comprises the following steps:

S7-1: Obtain the traffic parameters of each intersection of parallel intersections;

S7-2: Determine the control parameters of the traffic light signal based on the traffic parameters of each intersection of the parallel road section;

S7-3: Carry out traffic simulation debugging to obtain feasible control parameters of traffic light signals;

S7-4: Configure the traffic light signal display at each intersection of parallel road sections according to the control parameters of the optimal traffic light signal;

S7-5: Control the traffic flow at each intersection of parallel road sections based on traffic light signals.

The step S7-1 specifically includes the following steps:

S7-1-1: Obtain traffic equipment information at each intersection of parallel road sections;

S7-1-2: Obtain the existing traffic channelization scheme and the existing traffic light phase timing scheme at each intersection of parallel road sections;

S7-1-3: Select the key intersection of the parallel road section, and determine the maximum control cycle duration of the traffic light signal.

The control parameters of the traffic light signal in step S7-2 include the overall timing scheme of the traffic light, the phase bandwidth of the green light, the phase difference of the traffic light and the optimal speed value.

The step S7-2 specifically includes the following steps:

S7-2-1: Preliminarily determine the optimal speed value of the green phase control belt according to the distance between each intersection and the average travel time;

S7-2-2: Initially determine a green phase control bandwidth based on traffic flow data;

S7-2-3: Based on the pre-determined green phase control zone and the optimal speed value, calculate the travel time of the vehicle from the first intersection to other intersections;

S7-2-4: according to the travel time of step S7-2-3, respectively determine the moment when the traffic light signal timing of each crossing starts, and ensure that the vehicle arrives at each crossing is a green light signal;

S7-2-5: Adjust the green phase control bandwidth and optimal speed value respectively, and select the optimal green phase control bandwidth and optimal speed value;

S7-2-6: Calculate the phase difference of the traffic lights at each intersection based on the selected optimal green phase control bandwidth and the optimal speed value.

The present invention adopts the above technical scheme, and through the investigation and analysis of the road section characteristics, traffic flow characteristics and traffic signal control characteristics of the construction area, the variable information display screen is used to induce the traffic flow of the construction road section to the parallel road section of the diversion, and then according to the traffic flow of the parallel road section of the diversion. Features Through the phase control of the green light, the control of traffic flow at multiple intersections on the diverted parallel road section can be realized, and the overall traffic capacity of the construction area can be improved, which can relieve the traffic pressure in the "belt" construction area and ensure the traffic safety in the construction area.

Description of drawings

The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment;

Fig. 1 is the schematic flow sheet of the road traffic control method in the subway construction area of the present invention;

Fig. 2 is the concrete flow chart diagram of the step S7-2 of the subway construction area road traffic control method of the present invention;

Fig. 3 is a simplified schematic diagram of step S7-2 of the road traffic control method in the subway construction area of the present invention.

Detailed ways

As shown in one of Fig. 1-3, subway construction area road traffic control method of the present invention, it comprises the following steps:

S1: Investigate and analyze the traffic on the construction section. Through the traffic survey and traffic impact analysis and evaluation of the construction road section, it is determined whether the construction road section needs traffic improvement. In general, the decline in the traffic capacity of the subway construction section is a high probability event, and it is necessary to further find a suitable parallel section;

S2: According to the investigation and analysis results, determine whether the construction section needs traffic improvement;

S3: When it is necessary to improve the traffic, investigate the road conditions of the parallel road sections to be selected in the construction road section; this step needs to conduct repeated investigations on the parallel road sections to be selected in the construction road section, and select a road section with good basic conditions as a road section for diverting excess traffic flow in the construction road section alternative route.

However, with the rapid increase in the number of motor vehicles in the city, the traffic situation needs to be improved, especially the impact of road construction on traffic has gradually spread to the parallel road sections to be selected. At this time, it is also necessary to carry out reasonable and effective multi-intersection traffic flow control on parallel road sections. In order to improve the control efficiency, the main goal will be to evacuate the traffic flow in the main direction, and the setting of traffic lights will also focus on the main direction. The traffic flows smoothly through each intersection.

S4: Select a parallel road section to ease the traffic flow of the construction road section;

S5: Install traffic indicating devices on construction road sections and parallel road sections;

S6: divert the traffic flow of the construction road section to the parallel road section through the traffic indicating device;

S7: Coordinate and control the timing of all traffic lights on parallel road sections to control traffic flow. The optimal goal of traffic flow control at each intersection in the parallel section is that the traffic flow in the direction of the main road should not be interrupted by the red light signal at each intersection as much as possible. Of course, the time of the green light phase at each intersection is limited, and in order to smooth the overall traffic flow, sometimes it is necessary to lose the green light phase time of some branch roads.

The traffic survey on the construction section in the step S1 includes surveys on road characteristics, traffic flow characteristics and signal control characteristics.

The step S5 specifically includes setting a first variable information induction display screen at the entrance of each intersection of the parallel road section; and setting a second variable information induction display screen at the entrance of each intersection of the construction road section.

The first variable information induction display screen displays the optimal speed per hour of the parallel road section in real time, in kilometers per hour (km/h).

The second variable information induction display screen displays in real time the speed limit value in the main direction of the construction road section and the optimal speed value of the parallel road section, in kilometers per hour (km/h). The function of the second variable information induction display screen on the construction road section is relatively complicated. It mainly reminds the speed limit value on the construction road section and the optimal speed value on the parallel road section, and reminds the driver to transfer from the current position to the parallel road section. Time and other real-time information. The display content of the guidance display screen needs to be updated in real time according to the main parameters such as real-time road condition information, as well as the travel time from the construction road section to the parallel road section.

The traffic flow control in step S7 includes three different control modes for morning rush hour, evening rush hour and normal hour respectively. Many cities have "tidal" traffic phenomena. For example, during the morning rush hour, the traffic flow from the city to the outside of the city is greater than the traffic flow from the outside to the city; The traffic flow in the direction outside the city; and during normal hours, the difference between the traffic flow in the two directions is small. According to the characteristics of traffic flow and flow direction in the morning, evening peak and normal time periods, three traffic flow management and control schemes can be designed to improve the traffic capacity of the section parallel to the subway construction section, and further realize the transfer of the traffic flow of the subway construction section to the parallel section. In this way, the traffic congestion in the subway construction area can be greatly alleviated through the traffic guidance and the three-mode traffic control scheme, which improves the traffic capacity of the subway construction area in general and indirectly solves the safety problem of the subway construction.

Described step S7 specifically comprises the following steps:

S7-1: Obtain the traffic parameters of each intersection of parallel intersections;

S7-2: Determine the control parameters of the traffic light signal based on the traffic parameters of each intersection of the parallel road section;

S7-3: Carry out traffic simulation debugging to obtain feasible control parameters of traffic light signals;

S7-4: Configure the traffic light signal display at each intersection of parallel road sections according to the control parameters of the optimal traffic light signal,

S7-5: Control the traffic flow at each intersection of parallel road sections based on traffic light signals.

For the single-point signal control method, the pursuit is the maximum traffic efficiency of a single intersection, while the multi-intersection traffic control is to pursue the highest traffic capacity of key road sections as the control goal. In this example, the pursuit is the maximum traffic flow of the main road section Efficiency, through the traffic signal parameter setting of each intersection, the utilization rate of each intersection space can be improved in a more reasonable time. The traffic flow control in the main direction can greatly improve the traffic capacity of the main road section, and can evacuate the traffic flow in the main direction in a relatively short period of time. In order to cope with different traffic volumes at different times, it is necessary to formulate timing schemes corresponding to different situations, so that the traffic efficiency of multi-intersection traffic flow can be maximized. Considering various factors comprehensively, this patent formulates three corresponding signal timing schemes based on the traffic data of the three situations of normal time, morning peak and evening peak, and strives to maximize the traffic efficiency of the trunk direction road section.

The step S7-1 specifically includes the following steps:

S7-1-1: Obtain traffic equipment information at each intersection of parallel road sections;

S7-1-2: Obtain the existing traffic channelization scheme and the existing traffic light phase timing scheme at each intersection of parallel road sections;

S7-1-3: Select the key intersection of the parallel road section, and determine the maximum control cycle duration of the traffic light signal.

The control parameters of the traffic light signal in step S7-2 include the overall timing scheme of the traffic light, the phase bandwidth of the green light, the phase difference of the traffic light and the optimal speed value.

Further, the method for specifically confirming the control parameters of the traffic light signal in the step S7-2 includes the following steps:

S7-2-1: Preliminarily determine the optimal speed value of the green phase control belt according to the distance between each intersection and the average travel time;

S7-2-2: Initially determine a green phase control bandwidth based on traffic flow data;

S7-2-3: Based on the pre-determined green phase control zone and the optimal speed value, calculate the travel time of the vehicle from the first intersection to other intersections;

S7-2-4: according to the travel time of step S7-2-3, respectively determine the moment when the traffic light signal timing of each crossing starts, and ensure that the vehicle arrives at each crossing is a green light signal;

S7-2-5: Adjust the green phase control bandwidth and optimal speed value respectively, and select the optimal green phase control bandwidth and optimal speed value;

S7-2-6: Calculate the phase difference of the traffic lights at each intersection based on the selected optimal green phase control bandwidth and the optimal speed value.

As shown in Figure 3, when the control parameters of the traffic light signals in the step S7-2 are confirmed, the optimal speed per hour value of the initial green phase control zone is determined according to the distance between intersections and the average travel time, and then the green phase control zone is drawn. With a slash, set a bandwidth based on the traffic flow data, calculate the travel time of the vehicle from intersection 1 to 2, 3, and 4, and then determine the moment when the signal timing of each intersection starts to ensure that the vehicle arrives at each intersection with a green light signal, Then adjust the green phase control bandwidth to the maximum value; then adjust the optimal speed value and calculate again, compare the optimal speed value and the bandwidth value, select the optimal speed value is reasonable, and the bandwidth is relatively large, and then calculate the final determined intersections Green light phase difference.

For the single-point signal control method, the pursuit is the maximum traffic efficiency of a single intersection, while the multi-intersection traffic control is to pursue the highest traffic capacity of key road sections as the control goal. In this example, the pursuit is the maximum traffic flow of the main road section Efficiency, through the traffic signal parameter setting of each intersection, the utilization rate of each intersection space can be improved in a more reasonable time. The traffic flow control in the main direction can greatly improve the traffic capacity of the main road section, and can evacuate the traffic flow in the main direction in a relatively short period of time. In order to cope with different traffic volumes at different times, it is necessary to formulate timing schemes corresponding to different situations, so that the traffic efficiency of multi-intersection traffic flow can be maximized. Considering various factors comprehensively, three corresponding signal timing schemes are formulated according to the traffic data of the three situations of normal time, morning peak and evening peak, so as to maximize the traffic efficiency of the main road section.

The present invention adopts the above technical scheme, and through the investigation and analysis of the road section characteristics, traffic flow characteristics and traffic signal control characteristics of the construction area, the variable information display screen is used to induce the traffic flow of the construction road section to the parallel road section of the diversion, and then according to the traffic flow of the parallel road section of the diversion. Features Through the phase control of the green light, the control of traffic flow at multiple intersections on the diverted parallel road section can be realized, and the overall traffic capacity of the construction area can be improved, which can relieve the traffic pressure in the "belt" construction area and ensure the traffic safety in the construction area.

Claims (9)

1. The subway construction area road traffic control method is characterized in that: it may further comprise the steps: S1: Investigate and analyze the traffic on the construction section, S2: According to the investigation and analysis results, determine whether the construction section needs traffic improvement; S3: When the traffic needs to be improved, investigate the road conditions of the parallel road sections to be selected in the construction road section; S4: Select a parallel road section to ease the traffic flow of the construction road section; S5: Install traffic indicating devices on construction road sections and parallel road sections; S6: divert the traffic flow of the construction road section to the parallel road section through the traffic indicating device; S7: Coordinate and control the time of all traffic light signals on parallel road sections, and carry out traffic flow control; step S7 specifically includes the following steps: S7-1: Obtain the traffic parameters of each intersection of parallel intersections; S7-2: Determine the control parameters of the traffic light signal based on the traffic parameters of each intersection of the parallel road section; S7-3: Carry out traffic simulation debugging to obtain feasible and optimal traffic light signal control parameters; S7-4: Configure the traffic light signal display at each intersection of parallel road sections according to the control parameters of the optimal traffic light signal, S7-5: Control the traffic flow at each intersection of parallel road sections based on traffic light signals. 2. The road traffic control method in the subway construction area according to claim 1, characterized in that: in the step S1, the traffic investigation of the construction road section includes the investigation of road characteristics, traffic characteristics and signal control characteristics. 3. The road traffic control method in the subway construction area according to claim 1, characterized in that: said step S5 specifically includes setting the first variable information inducing display screen at the entrances of each crossing in parallel road sections; The entrances of the intersections are respectively provided with second variable information induction display screens. 4. The road traffic control method in the subway construction area according to claim 3, characterized in that: the first variable information inducing display screen displays in real time the optimum speed per hour of parallel road sections. 5. The road traffic control method in the subway construction area according to claim 3, characterized in that: the second variable information induction display screen displays in real time the speed limit value in the trunk direction of the construction road section and the optimal speed value in the parallel road section. 6. The road traffic control method in the subway construction area according to claim 1, characterized in that: the traffic flow management and control in step S7 includes three different control modes for morning peak, evening peak and normal time periods respectively. 7. The subway construction area road traffic control method according to claim 1, characterized in that: said step S7-1 specifically comprises the following steps: S7-1-1: Obtain traffic equipment information at each intersection of parallel road sections; S7-1-2: Obtain the existing traffic channelization scheme and the existing traffic light phase timing scheme at each intersection of parallel road sections; S7-1-3: Select the key intersection of the parallel road section, and determine the maximum control cycle duration of the traffic light signal. 8. The road traffic control method in the subway construction area according to claim 1, characterized in that: the control parameters of the traffic light signals in the step S7-2 include the overall timing scheme of the traffic lights, the phase bandwidth of the green lights, the phase difference of the traffic lights and the maximum best speed value. 9. The road traffic control method in the subway construction area according to claim 1 or 8, characterized in that: said step S7-2 specifically comprises the following steps: S7-2-1: Preliminarily determine the optimal speed value of the green phase control belt according to the distance between each intersection and the average travel time, S7-2-2: Initially determine a green phase control bandwidth based on traffic flow data, S7-2-3: Based on the pre-determined green phase control zone and the optimal speed value, calculate the travel time of the vehicle from the first intersection to other intersections respectively, S7-2-4: According to the travel time of step S7-2-3, respectively determine the moment when the traffic light signal timing of each crossing starts, and ensure that the vehicle arrives at each crossing is a green light signal, S7-2-5: Adjust the green phase control bandwidth and optimal speed value respectively, and select the optimal green phase control bandwidth and optimal speed value; S7-2-6: Calculate the phase difference of the traffic lights at each intersection based on the selected optimal green phase control bandwidth and the optimal speed value.