Signal control method, system, device and medium based on improving pedestrian crossing phase

Abstract

The present invention discloses a signal control method, system, device and medium based on improving the pedestrian crossing phase. The method comprises: measuring the intersection O i Length of zebra crossing in each direction L i ; Calculate the minimum pedestrian crossing time W for each zebra crossing i ; Investigate the average traffic volume Q of vehicles in each direction at the intersection i ; Record each release phase P of the four-phase control scheme commonly used at the intersection i ; Record the pedestrian following release phase PW at the intersection i and calculate release time PWT i , Pedestrian-only phase WE i and calculate release time WET i ; Adjust the signal phase release order at the intersection; Finally, obtain the signal control scheme and implement it. The present invention ensures the traffic efficiency of motor vehicles and alleviates the congestion at the intersection by innovatively combining the pedestrian following signal phase and the pedestrian crossing signal phase.

Description

Technical Field

[0001] The present invention belongs to the field of urban road traffic signal control, and in particular relates to a signal control method, system, equipment and medium based on improving the pedestrian crossing phase. Background Art

[0002] There are two main types of pedestrian green light release phases at conventional signal-controlled intersections. The first is the pedestrian following release phase, that is, the pedestrian light and the signal light for straight-moving motor vehicles in the same direction are lit and extinguished at the same time. This release method is suitable for most intersections. The pedestrian green light time is basically the same as the green light time for straight-moving motor vehicles in the same direction. For example, at a crossroads, the green light for straight-moving motor vehicles and the green light for pedestrians in the same direction can be turned on at the same time. The second is that the pedestrian green lights in all directions of the intersection are on at the same time, pedestrians can pass, and motor vehicles are prohibited from passing when the red light is on. It is suitable for signal-controlled intersections with large pedestrian traffic, such as large squares, shopping malls and downtown areas.

[0003] The first pedestrian following release phase is the most widely used. When the motor vehicle flow is large, the green light release time is longer, and pedestrians have enough green light time to cross the road. However, when the motor vehicle flow is small (such as at night), in order to ensure that pedestrians can safely cross the zebra crossing, it is still necessary to set a fixed pedestrian green light time according to the width of the intersection. The wider the intersection and the longer the zebra crossing, the longer the green light time needs to be set. Therefore, at night, it is often the case that motor vehicles have finished crossing, because pedestrians cross the street slowly and take a long time, and the motor vehicle green light still has to be on at the same time as the pedestrian green light, resulting in a waste of motor vehicle green light time, which is easy to cause dissatisfaction and red light running by drivers in other directions of the intersection. The second setting of pedestrian lights in all directions of the intersection can meet the traffic needs of pedestrians crossing the street to the greatest extent, but it will have a greater impact on the traffic efficiency of motor vehicles. The more pedestrians cross the street, the greater the impact, which is easy to cause traffic congestion. Summary of the invention

[0004] The main purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a signal control method, system, device and medium based on improving the pedestrian crossing phase. By innovatively combining the pedestrian following signal phase and the pedestrian crossing dedicated signal phase, the signal control method can ensure the safe crossing time and traffic safety of pedestrians when there are few motor vehicles, and reduce the waste of green light time for motor vehicles.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a signal control method based on improving the pedestrian crossing phase, comprising the following steps:

[0007] Measuring intersection O i Length of zebra crossing in each direction Li ;

[0008] Get pedestrians passing through intersection O i The minimum crossing time W for zebra crossings in all directions i ;

[0009] Get intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ;

[0010] Record intersection O i Each release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that a motor vehicle is turning left from north to south;

[0011] Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the pedestrian signal light and the motor vehicle signal light going straight in the same direction being lit and extinguished at the same time;

[0012] The minimum crossing time for east-west pedestrians is W. 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O iSignal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

[0013] As a preferred technical solution, the intersection O i It is a cross-shaped intersection with a zebra crossing at each of the four entrances.

[0014] As an optimal technical solution, the minimum street crossing time W i The value range of is 1m / s-1.2m / s, depending on the main type of pedestrian flow in the intersection area. The calculation formula for the minimum crossing time is: Where r is the average walking speed of pedestrians.

[0015] As a preferred technical solution, the acquisition of intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i Each collection time in each time period shall not be less than 15 minutes.

[0016] As a preferred technical solution, the pedestrian following release phase PW 1 Phase PW for vehicles going east-west and pedestrians following 2 For a motor vehicle traveling straight north and south; the calculation of PW 1 and PW 2 The release time is PWT 1 and PWT 2 The specific steps are:

[0017] Calculate the optimal signal control cycle duration C i The formula is:

[0018]

[0019] Among them, L is the total signal loss time, Y is the total flow ratio;

[0020] Record the release time of each phase as PT i , the calculation formula is:

[0021]

[0022] The pedestrian following phase release time PWT can be obtained i The calculation formula is:

[0023]

[0024] Where y i＝ q i / s i ,q i is the actual arrival flow at the i-th import, s i is the saturated flow rate in the i-th phase flow direction;

[0025] According to the requirements of GA / T 527.1-2015 on the minimum release time of the phase, PT is required i ≥15.

[0026] As a preferred technical solution, the adjustment of intersection O i Signal phase release mode and add a pedestrian-only phase WE between the two pedestrian following modes i , specifically:

[0027] If W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode, set the two pedestrian following phases to the connection operation mode, that is, the order is P 2 , PW 1 , PW 2 , P 4 , and add a pedestrian-only phase WE between the two pedestrian-following phases i , the phase order after adjustment is P 2 , PW 1 , WE i , PW 2 , P 4 .

[0028] As a preferred technical solution, two-way straight driving will also involve the situation that the zebra crossings on both sides of the same direction are of different lengths. In order to ensure the safety of pedestrians crossing the street on both sides at the same time, W i The crossing time requirement of the zebra crossing on the longer side shall be taken as the standard; when there is W i ≤PWT i The pedestrian phase WE is cancelled during this period. i

[0029] In a second aspect, the present invention provides a signal control system based on improving the pedestrian crossing phase, which is applied to the signal control method based on improving the pedestrian crossing phase, including a road intersection measurement module, a crossing time acquisition module, an average flow acquisition module, a phase and release time acquisition module, and a signal adjustment module;

[0030] The measuring intersection module is used to measure the intersection O i Length of zebra crossing in each direction L i ;

[0031] The street crossing time acquisition module is used to obtain the time consumption of pedestrians passing through the intersection O i The minimum crossing time W for zebra crossings in all directions i ;

[0032] The average flow acquisition module is used to calculate the intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ;

[0033] The phase and release time acquisition module records the intersection O i Each release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that the motor vehicle turns left from north to south; Phase 1 P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the pedestrian signal light and the motor vehicle signal light going straight in the same direction being lit and extinguished at the same time;

[0034] The signal adjustment module records the minimum crossing time of east-west pedestrians as W 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

[0035] In a third aspect, the present invention provides an electronic device, the electronic device comprising:

[0036] at least one processor; and,

[0037] a memory communicatively connected to the at least one processor; wherein,

[0038] The memory stores computer program instructions that can be executed by the at least one processor, and the computer program instructions are executed by the at least one processor to enable the at least one processor to perform the signal control method based on improving the pedestrian crossing phase.

[0039] In a fourth aspect, the present invention provides a storage medium storing a program, which, when executed by a processor, implements the signal control method based on improving the pedestrian crossing phase.

[0040] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0041] (1) The present invention proposes a signal control method based on an innovative combination of pedestrian following signal phase and pedestrian crossing signal phase. When there are few motor vehicles, it can ensure the safe crossing time and traffic safety of pedestrians and reduce the waste of green light time for motor vehicles. When there are many pedestrians, it can avoid occupying too much traffic time of motor vehicles, ensure the traffic efficiency of motor vehicles, and achieve a balance between the traffic efficiency of motor vehicles and the safety of pedestrians crossing the street. Especially during periods of low traffic volume at intersections, the traffic light release cycle can be reduced, the waiting time of vehicles at red lights at intersections can be reduced, the travel experience of the public can be improved, and the phenomenon of motor vehicles and pedestrians running red lights can be reduced.

[0042] (2) The present invention can achieve the situation that there is no need to add pedestrian secondary crossing signal lights to the existing intersections. By scientifically adjusting the signal light release mode, sufficient pedestrian safe crossing time can be guaranteed during the low-peak period of road motor vehicle traffic, and the waste of motor vehicle green light time can be reduced, so as to achieve the balance of safety and efficiency of the signal control scheme. Taking the common cross-shaped intersection as an example, the zebra crossings in four directions, it costs about 8,500 yuan to install a set of pedestrian secondary crossing signal lights on a zebra crossing, so that 34,000 yuan can be saved for the secondary crossing signal lights in four directions of an intersection, and the subsequent maintenance costs and the construction costs of pedestrian safety islands have not been calculated. In addition, the scope of application of the invention is relatively wide, and both conventional T-shaped intersections and cross-shaped intersections can be applied. Taking a medium-sized city with 700 signal-controlled intersections as an example, taking 10% of them, that is, 70 intersections that need to build secondary crossing signal lights, more than 2.3 million construction and maintenance funds can be saved.

[0043] 80% of the signal-controlled intersections, or 560, are conventional T-shaped intersections and cross-shaped intersections, and the average signal release cycle of the intersection is 100 seconds. After the signal control scheme of the present invention is activated, the average waiting time of each cycle can be reduced by 10%, or more than 10 seconds, and 360 seconds can be reduced per hour. Taking the intersection of the invention method as an example, the waiting time can be reduced by 2880 seconds per day during the off-peak period (22:30--06:30). The city can reduce 1612800 seconds per day, which is equivalent to 448 hours, or 18.6 days. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 is a flow chart of a signal control method based on improving the pedestrian crossing phase according to an embodiment of the present invention;

[0045] Figure 2 It is a basic information diagram of a road intersection according to an embodiment of the present invention;

[0046] Figure 3 Schematic diagram of the original signal release phase scheme at the intersection according to an embodiment of the present invention;

[0047] Figure 4It is a traffic statistics diagram of an intersection according to an embodiment of the present invention;

[0048] Figure 5 Schematic diagram of a new release phase mode at an intersection according to an embodiment of the present invention;

[0049] Figure 6 It is a structural schematic diagram of a signal control system based on improving the pedestrian crossing phase of the present invention;

[0050] Figure 7 It is a schematic diagram of the structure of the storage medium of an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0052] Example

[0053] A cross-shaped intersection in a certain city is located in the suburbs of the city. The location is relatively remote and the daily traffic volume is relatively small. Because there are many construction sites in the surrounding area, heavy transport vehicles such as dump trucks and mud trucks account for a high proportion. In order to ensure the safety of people crossing the intersection, the city’s traffic management department built and activated traffic lights here. The intersection has surplus traffic capacity and no traffic congestion. In accordance with safety protection needs, a standard four-phase release method is designed to fully ensure the safety of pedestrians crossing the street. The minimum timing cycle for signal release during off-peak hours is 100 seconds.

[0054] It should be noted that in the description of the present invention, "phase" refers to each control state (a right of way) at a signalized intersection, that is, a combination of different light colors displayed for different directions of various entrances, which is called a phase. i It can be O 1 , O 2 , O 3 , O 4 .......Crossroads O i It is not limited to the intersection in this embodiment; at the same time, the length of each zebra crossing at the intersection mentioned in this embodiment is 35 meters, but it should be known that the length of zebra crossings at different intersections may be different, for example, at another intersection in the city, the length of each zebra crossing is 30 meters.

[0055] like Figure 1 As shown, this embodiment provides a signal control method based on improving the pedestrian crossing phase, including the following steps:

[0056] S1: Measurement intersection O i Length of zebra crossing in each direction L i , the measurement range is the actual distance required for pedestrians to cross the street;

[0057] like Figure 2 As shown, an intersection O in the city i It is a conventional crossroad. Each of the four entrances of each crossroad has a zebra crossing. According to field measurements, the length of the zebra crossing at this intersection is L 1 , L 2 , L 3 , L 4 It is about 35 meters. The green light for pedestrians follows the phase 1 and phase 3 signal lights respectively. The original plan is a conventional signal control plan, such as Figure 3 shown.

[0058] S2: Get pedestrians passing through intersection O i The minimum crossing time W for zebra crossings in all directions i ;

[0059] Furthermore, the minimum street crossing time W i The value range is 1m / s-1.2m / s, depending on the main type of pedestrian flow in the intersection area; this intersection is a suburban intersection, surrounded by ordinary residential areas, without large schools or hospitals, and the walking speed of pedestrians on the zebra crossing can be 1.0m / s. Among them, r is the average walking speed of pedestrians. It can be concluded that the minimum green light time for four imported zebra crossings to ensure the safety of pedestrians crossing the street is 35 seconds.

[0060] S3: Investigate the motor vehicle flow in all directions at the intersection during peak, off-peak, and low-peak periods. Each collection time should be no less than 15 minutes, and calculate the average flow rate Q at the intersection. i According to field research, the average traffic volume at intersections during off-peak hours is as follows: Figure 4 shown.

[0061] S4: Research intersection O i The signal release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i , each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P4 Indicates that a motor vehicle is turning left from north to south;

[0062] The original signal control scheme cycle and phase time of the intersection are shown in Table 1:

[0063] Intersection Name Duration (seconds) Phase 1 (East-West Direction) 35 Phase 2 (East-West Left Turn) 15 Phase 3 (straight north-south) 35 Phase 4 (North-South Left Turn) 15 Timing cycle 100

[0064] Table 1 The original signal control scheme cycle and phase time of the intersection (off-peak period)

[0065] S5: Phase 1P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases. Combined with the original scheme of the intersection, we can know that phase one P 1 and Phase Triple P 3 If there are pedestrians following and letting go, then record intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the simultaneous lighting and simultaneous extinguishing of the pedestrian signal light and the signal light of the motor vehicle going straight in the same direction;

[0066] Furthermore, the pedestrian following release phase PW 1 Phase PW for vehicles going east-west and pedestrians following 2 For a motor vehicle traveling straight north and south; the calculation of PW 1 and PW 2 The release time is PWT 1 and PWT 2 The specific steps are:

[0067] Calculate the optimal signal control cycle duration C i The formula is:

[0068]

[0069] Among them, L is the total signal loss time, Y is the total flow ratio;

[0070] Each phase release time PT i The calculation formula is:

[0071]

[0072] Pedestrian following phase release time PWT i The calculation formula is:

[0073]

[0074] Where y i =q i / s i ,q i is the actual arrival flow at the i-th import, s i is the saturated flow rate in the i-th phase flow direction.

[0075] According to the requirements of GA / T 527.1-2015 on the minimum release time of the phase, PT is required i ≥15.

[0076] S6: Record the minimum crossing time for east-west pedestrians as W 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

[0077] Further, the adjustment intersection O i Signal phase release mode and add a pedestrian-only phase WE between the two pedestrian following modes i , specifically:

[0078] If W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode, set the two pedestrian following phases to the connection operation mode, that is, the order is P 2, PW 1 , PW 2 , P 4 , and add a pedestrian-only phase WE between the two pedestrian-following phases i , the phase order after adjustment is P 2 , PW 1 , WE i , PW 2 , P 4 ;

[0079] In addition, two-way straight driving will also cause the zebra crossings on both sides of the same direction to be of different lengths. In order to ensure the safety of pedestrians crossing the street on both sides at the same time, W i The crossing time requirement of the zebra crossing on the longer side shall be taken as the standard; when there is W i ≤PWT i The pedestrian phase WE is cancelled during this period. i ;

[0080] Specifically, according to the traffic volume of vehicles at the intersection and relevant regulations, PWT 1 and PWT 2 The setting can be 15 seconds to ensure the minimum pedestrian crossing time requirement. At the same time, according to the calculation of S2, the minimum green light time for pedestrians crossing the four entrance zebra crossings is 35 seconds. Combined with the relationship between the four entrance pedestrian crossing green lights and the follow-up release of motor vehicles, PWT is required 1 +WET i ≥35 seconds and PWT 2 +WET i ≥35 seconds, it can be calculated that the time of phase three (pedestrian-only phase) in the new signal control scheme is 20 seconds.

[0081] If the traffic volume of motor vehicles is large during other periods, when the green light time of phase two or phase four is ≥35 seconds, there is no need to add a pedestrian-only phase in phase three.

[0082] As shown in Table 2, the cycle and phase time (off-peak period) of the new signal control scheme at the intersection, the new signal control scheme was sent to the traffic lights for operation, and the minimum pedestrian crossing time in all four directions reached 35 seconds, ensuring crossing safety; the green light time for motor vehicles was reduced from the original 35 seconds to 15 seconds, which is more in line with the traffic needs during the off-peak period at night, reducing the waste of green light time, and reducing the total week of the intersection scheme by 20 seconds, thus significantly improving traffic efficiency and improving people's travel experience.

[0083]

[0084]

[0085] Table 2 Cycle and phase time of the new signal control scheme at the intersection (off-peak period)

[0086] like Figure 6 As shown, in another embodiment of the present application, a signal control system based on improving the pedestrian crossing phase is provided, the system includes a road intersection measurement module, a crossing time acquisition module, an average flow acquisition module, a phase and release time acquisition module and a signal adjustment module;

[0087] The measuring intersection module is used to measure the intersection O i Length of zebra crossing in each direction L i ;

[0088] The street crossing time acquisition module is used to obtain the time consumption of pedestrians passing through the intersection O i The minimum crossing time W for zebra crossings in all directions i ;

[0089] The average flow acquisition module is used to calculate the intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ;

[0090] The phase and release time acquisition module records the intersection O i Each release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that the motor vehicle turns left from north to south; Phase 1 P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i; The pedestrian following release phase refers to the simultaneous lighting and simultaneous extinguishing of the pedestrian signal light and the signal light of the motor vehicle going straight in the same direction;

[0091] The signal adjustment module records the minimum crossing time of east-west pedestrians as W 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

[0092] It should be noted here that the system provided in the above embodiment is only illustrated by the division of the above functional modules. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure is divided into different functional modules to complete all or part of the functions described above. The system is a signal control method based on improving the pedestrian crossing phase applied to the above embodiment.

[0093] like Figure 7 As shown, in another embodiment of the present application, a storage medium is further provided, storing a program, and when the program is executed by a processor, a signal control method based on improving the pedestrian crossing phase is implemented, specifically:

[0094] Step 1: Measure intersection O i Length of zebra crossing in each direction L i ;

[0095] Step 2: Get pedestrians passing through intersection O i The minimum crossing time W for zebra crossings in all directions i ;

[0096] Step 3: Get intersection O iThe average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ;

[0097] Step 4: Record intersection O i Each release phase P of the commonly used two-way straight plus two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that a motor vehicle is turning left from north to south;

[0098] Step 5: Phase 1 P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the simultaneous lighting and simultaneous extinguishing of the pedestrian signal light and the signal light for the motor vehicle going straight in the direction;

[0099] Step 6: Record the minimum crossing time for east-west pedestrians as W 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

[0100] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0101] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A signal control method based on improving the pedestrian crossing phase, It is characterized in that The steps include: Measuring intersection O i Length of zebra crossing in each direction L i ; Get pedestrians passing through intersection O i The minimum crossing time W for zebra crossings in all directions i ; Get intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ; Record intersection O i Each release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that a motor vehicle is turning left from north to south; Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the pedestrian signal light and the motor vehicle signal light going straight in the same direction being lit and extinguished at the same time; The minimum crossing time for east-west pedestrians is W. 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

2. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that The intersection O i It is a cross-shaped intersection with a zebra crossing at each of the four entrances.

3. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that The minimum street crossing time W i The value range of is 1m / s-1.2m / s, depending on the main type of pedestrian flow in the intersection area. The calculation formula for the minimum crossing time is: Where r is the average walking speed of pedestrians.

4. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that The acquisition of intersection O i The average traffic flow Q of motor vehicles in each direction during peak hours, off-peak hours, and low-peak hours i When collecting, the collection time each time shall be not less than 15 minutes within each time period.

5. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that The pedestrian following release phase PW 1 Phase PW for vehicles going east-west and pedestrians following 2 For a motor vehicle traveling straight north and south; the calculation of PW 1 and PW 2 The release time is PWT 1 and PWT 2 The specific steps are: Calculate the optimal signal control cycle duration C i The formula is: Among them, L is the total signal loss time, Y is the total flow ratio; Record the release time of each phase as PT i , the calculation formula is: The pedestrian following phase release time PWT can be obtained i The calculation formula is: In the formula ,q i is the actual arrival flow at the i-th import, s i is the saturated flow rate in the i-th phase flow direction; According to the requirements of GA / T 527.1-2015 on the minimum release time of the phase, PT is required i ≥15.

6. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that The adjustment intersection O i Signal phase release mode and add a pedestrian-only phase WE between the two pedestrian following modes i , specifically: If W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode, set the two pedestrian following phases to the connection operation mode, that is, the order is P 2 , PW 1 , PW 2 , P 4 , and add a pedestrian-only phase WE between the two pedestrian-following phases i , the phase order after adjustment is P 2 , PW 1 , WE i , PW 2 , P 4 .

7. The signal control method based on improving the pedestrian crossing phase according to claim 1, It is characterized in that Two-way straight driving will also cause the zebra crossings on both sides of the same direction to be of different lengths. In order to ensure the safety of pedestrians crossing the street on both sides, W i The crossing time requirement of the zebra crossing on the longer side shall be taken as the standard; when there is W i ≤PWT i The pedestrian phase WE is cancelled during this period. i .

8. Based on the signal control system that improves the pedestrian crossing phase, It is characterized in that A signal control method based on improving the pedestrian crossing phase applied to any one of claims 1-7, comprising a road intersection measurement module, a crossing time acquisition module, an average flow acquisition module, a phase and release time acquisition module, and a signal adjustment module; The measuring intersection module is used to measure the intersection O i Length of zebra crossing in each direction L i ; The street crossing time acquisition module is used to obtain the time consumption of pedestrians passing through the intersection O i The minimum crossing time W for zebra crossings in all directions i ; The average flow acquisition module is used to calculate the average flow rate of the intersection O i The average traffic volume Q of vehicles in each direction during peak, off-peak and low-peak periods i ; The phase and release time acquisition module records the intersection O i Each release phase P of the commonly used two-way straight and two-way left turn four-phase control scheme i ; Each release phase P i Phase-P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 , where phase -P 1 Indicates that the motor vehicle is going straight east-west, phase 2 P 2 Indicates that the motor vehicle turns left from east to west, phase three P 3 Indicates that the motor vehicle is traveling straight north and south, phase four P 4 Indicates that the motor vehicle turns left from north to south; Phase 1 P 1 、Phase 2 2 、Phase 3P 3 、Phase 4P 4 At least two of them are pedestrian following release phases, and the intersection O i The pedestrian following release phase is PW 1 and PW 2 , calculate PW 1 and PW 2 The release time is PWT 1 and PWT 2 , set the pedestrian phase to WE i , WE i The release time is WET i ; The pedestrian following release phase refers to the simultaneous lighting and simultaneous extinguishing of the pedestrian signal light and the signal light of the motor vehicle going straight in the same direction; The signal adjustment module records the minimum crossing time of east-west pedestrians as W 1 , the minimum crossing time for north-south pedestrians W 2 , if W 1 -PWT 1 >0 and W 2 -PWT 2 >0, adjust intersection O i Signal phase release mode and two pedestrian following phase PW 1 and PW 2 Add a pedestrian-only phase WE i ; The pedestrian-only phase WE i Release time WET i =(W 1 -PWT 1 )+(W 2 -PWT 2 ), where PWT 1 Pedestrian following release phase PW 1 Release time; PWT 2 Pedestrian following release phase PW 2 release time.

9. An electronic device, It is characterized in that The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores computer program instructions that can be executed by the at least one processor, and the computer program instructions are executed by the at least one processor so that the at least one processor can execute the signal control method based on improving the pedestrian crossing phase as described in any one of claims 1 to 7.

10. A storage medium storing a program, It is characterized in that When the program is executed by a processor, the signal control method based on improving the pedestrian crossing phase as described in any one of claims 1 to 7 is implemented.

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