A timing design method for inductive right turn signal of motor vehicle

Abstract

The present invention relates to the field of intelligent traffic control technology, and discloses a method for designing the timing of an inductive right-turn signal for a motor vehicle, which comprises the following steps: obtaining design parameters for the timing of an inductive right-turn signal for a motor vehicle; obtaining information on pedestrians crossing the street and information on non-motor vehicle traffic; calculating the basic duration of a right-turn red light for a motor vehicle; calculating the extended duration of a right-turn red light for a motor vehicle; comparing the sum of the duration of a straight-through and left-turn green light and the duration of a straight-through and left-turn yellow light, and the sum of the basic duration of a right-turn red light for a motor vehicle and the extended duration of a right-turn red light for a motor vehicle, to obtain the total duration of a right-turn red light for a motor vehicle. The present invention can reduce the conflict between a right-turn motor vehicle and a straight-through non-motor vehicle, enhance the safety level of the road, reduce the delay time of a right-turn motor vehicle, and improve the operation efficiency of an intersection.

Description

Technical Field

[0001] The invention relates to the technical field of intelligent traffic control, and in particular to a timing design method for an inductive motor vehicle right turn signal. Background Art

[0002] Mixed traffic of motor vehicles and non-motor vehicles is one of the characteristics of urban road traffic flow in my country. On the road section, motor vehicles and non-motor vehicles are separated by hard barriers or signs and markings, and there are few conflicts between them; however, within the scope of the intersection, the three traffic flows of motor vehicles, non-motor vehicles and pedestrians interweave and cross on the same plane, resulting in mutual interference and conflict.

[0003] Signal control can effectively separate various types of traffic flows in time and improve the crossing safety of non-motor vehicles and pedestrians. It is worth noting that signal intersections usually do not control the right turn of motor vehicles, or the red light duration of right-turning motor vehicles is designed based on the green light duration of the same-direction straight-through. However, the former control measures ignore the intersection conflict between right-turning motor vehicles and straight-through non-motor vehicles, especially nowadays with the increasing number of non-motor vehicles on the road, the conflict problem is becoming more and more serious, causing traffic disorder and frequent traffic accidents. The latter timing design ignores the right-turn traffic efficiency of motor vehicles, especially when the non-motor vehicle traffic volume is small, which increases the parking delay of motor vehicles, easily causing long queues of right-turning motor vehicles, and reduces the traffic service level of the intersection.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] In view of this, the purpose of the embodiments of the present application is to provide a method for designing timing of an inductive right turn signal for a motor vehicle, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To this end, the specific technical solution adopted by the present invention is as follows:

[0007] A method for designing timing of an inductive right-turn signal for a motor vehicle, the method comprising the following steps:

[0008] S1. Obtain design parameters for the timing of an inductive motor vehicle right turn signal.

[0009] S2. Obtain information on pedestrians crossing the street and non-motor vehicle traffic by setting up road test equipment at a predetermined distance from the stop line of the non-motor vehicle lane and at the corner of the intersection.

[0010] S3. Calculate the basic duration of a right turn at a red light for motor vehicles based on the obtained pedestrian information, non-motor vehicle traffic information and design parameters.

[0011] S4. Calculate the extension time of the right turn red light for motor vehicles based on the arrival characteristics of pedestrians and non-motor vehicles.

[0012] S5. Compare the sum of the duration of the green light for going straight and turning left and the duration of the yellow light for going straight and turning left, and the sum of the basic duration of the red light for motor vehicles to turn right and the extended duration of the red light for motor vehicles to turn right, to obtain the total duration of the red light for motor vehicles to turn right.

[0013] Optionally, by setting up a road test device at a predetermined distance from the stop line of the non-motor vehicle lane and at the corner of the intersection, obtaining the pedestrian crossing information and the non-motor vehicle flow information includes the following steps:

[0014] S21. Install a non-motor vehicle speed and arrival time cross-section detector and a warning horn at a predetermined distance from the stop line of the non-motor vehicle lane;

[0015] S22. Install non-motor vehicle and pedestrian queue length detectors at the intersection corners;

[0016] S23, recording the time when the straight and left turn green lights are on as the initial time zero, and using a non-motor vehicle and pedestrian queue length detector to measure and obtain pedestrian crossing information and non-motor vehicle traffic information.

[0017] Optionally, the pedestrian crossing information and non-motor vehicle traffic information include the length of non-motor vehicle queues in the same direction, the length of pedestrian queues in the same direction, and the length of pedestrian queues in the opposite direction.

[0018] Optionally, based on the acquired pedestrian information, non-motor vehicle traffic information and design parameters, calculating the basic duration of a right turn red light for motor vehicles includes the following steps:

[0019] S31. If the length of the queue of non-motor vehicles in the same direction, the length of the queue of pedestrians in the same direction, and the length of the queue of pedestrians in the opposite direction are all zero, then the basic duration of the right turn red light for motor vehicles is zero;

[0020] S32. If any of the lengths of the queue of non-motor vehicles in the same direction, the lengths of the queue of pedestrians in the same direction, and the lengths of the queue of pedestrians in the opposite direction is not zero, the basic duration of the right turn on a red light for motor vehicles is calculated. The calculation formula for the basic duration of the right turn on a red light for motor vehicles is:

[0021]

[0022] Where, L bl It represents the length of the trajectory from the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle, L b0 Indicates the length of the non-motor vehicle queue in the same direction, L b Represents the average length of non-motor vehicles, L bs Indicates the length of the trajectory of the straight-moving non-motor vehicle to the point of conflict with the right-turning motor vehicle;

[0023] W pW represents the walking trajectory length of pedestrians crossing the street in the same direction to the conflict point with right-turning vehicles, p0 represents the length of the same-direction pedestrian queue, W′ p W′ represents the walking trajectory length of the pedestrian crossing the street to the conflict point with the right-turning motor vehicle. p0 Indicates the length of the opposite pedestrian queue;

[0024] v b represents the average speed of non-motor vehicles crossing the street, v p Indicates the average walking speed of pedestrians crossing the street.

[0025] Optionally, based on the analysis of the arrival characteristics of pedestrians and non-motor vehicles, calculating the extension time of the right turn red light for motor vehicles includes the following steps:

[0026] S41, record the nth i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time Where i represents the number of non-motor vehicle cluster queues passing through the non-motor vehicle speed and arrival time cross-section detector, n i represents the nth non-motor vehicle in the i-th non-motor vehicle cluster queue;

[0027] S42, record the (n+1)th i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time

[0028] S43, judging whether the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector is a cluster queue, and the judging formula is:

[0029]

[0030] Where, L b represents the average length of non-motor vehicles;

[0031] S44, if the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector satisfies the judgment formula, assign n+1 to n, and execute S42-S43 in a loop;

[0032] S45, if the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector does not satisfy the judgment formula, then calculating the average speed of the non-motor vehicle cluster queue;

[0033] S46. Calculate the extended time of the right turn red light for motor vehicles based on the average speed of the non-motor vehicle cluster queue, the number of non-motor vehicle cluster queues, and the calculated value of the basic time of the right turn red light for motor vehicles.

[0034] Optionally, according to the average speed of the non-motor vehicle cluster queue, the number of the non-motor vehicle cluster queue and the calculated value of the basic duration of the right turn red light for motor vehicles, calculating the extended duration of the right turn red light for motor vehicles comprises the following steps:

[0035] S461, if the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, determine whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turn motor vehicle, and calculate the first extension duration of the right-turn red light for motor vehicles;

[0036] S462, if the basic duration of the right-turn red light for motor vehicles is equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, determine whether the first group of non-motor vehicle cluster queues can reach the stop line before the right-turn motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, and calculate the first extension duration of the right-turn red light for motor vehicles;

[0037] S463, if the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is greater than or equal to two, determine whether the i-th group of non-motor vehicle queues can reach the stop line before the i-1-th group of non-motor vehicle queues pass through the conflict point with the right-turning motor vehicles, and calculate the i-th extension duration of the right-turn red light for motor vehicles;

[0038] S464. Add the first extension time of the right turn red light for the motor vehicle to the i-th extension time of the right turn red light for the motor vehicle to obtain the extension time of the right turn red light for the motor vehicle.

[0039] Optionally, determining whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, and calculating the first extension time of the motor vehicle right-turn red light includes the following steps:

[0040] S4611. If the first group of non-motor vehicle clusters can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, the calculation formula for the first extension time of the right-turn red light for motor vehicles is:

[0041]

[0042] Where L0 represents the predetermined distance, L bs Indicates the length of the trajectory of the straight non-motor vehicle to the point of conflict with the right-turning motor vehicle, L bl Indicates the length of the trajectory of the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle;

[0043] represents the time when the nth non-motor vehicle in the first non-motor vehicle cluster passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the first non-motor vehicle in the first non-motor vehicle cluster passes through the non-motor vehicle speed and arrival time cross-section detector;

[0044] represents the average speed of the first non-motor vehicle cluster queue;

[0045] Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector;

[0046] S4612: If the first group of non-motor vehicle cluster queues cannot reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicles, the first extension time of the right-turn red light for motor vehicles is zero, and a broadcast is played on the right side of the non-motor vehicle lane.

[0047] Optionally, determining whether the first group of non-motor vehicle cluster queues can reach the stop line before the right-turning motor vehicle reaches a conflict point with the straight-moving or left-turning non-motor vehicles, and calculating the first extension time of the right-turn red light for the motor vehicle comprises the following steps:

[0048] S4621, if the first group of non-motor vehicle cluster queues can reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is calculated using the calculation formula for the first extension time of the right-turn red light for motor vehicles in S4611, i+1 is assigned to i, and the process returns to S42-S45 and executes in sequence, and continues to judge the next time the non-motor vehicle queue arrives at the non-motor vehicle speed and arrival time cross-section detector;

[0049] S4622. If the first group of non-motor vehicle clusters cannot reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-moving or left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is zero, and a broadcast is played on the right side of the non-motor vehicle lane.

[0050] Optionally, judging whether the i-th group of non-motor vehicle queues can reach the stop line before the i-1-th group of non-motor vehicle queues pass the conflict point with the right-turning motor vehicles, and calculating the i-th extension time of the right-turn red light for motor vehicles comprises the following steps:

[0051] S4631. If the i-th group of non-motor vehicles can reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the calculation formula for the i-th extension time of the right-turn red light for motor vehicles is:

[0052]

[0053] In the formula, represents the time when the nth non-motor vehicle in the i-th non-motor vehicle cluster queue passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the nth non-motor vehicle in the i-1th non-motor vehicle cluster queue passes the non-motor vehicle speed and arrival time cross-section detector;

[0054] Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector;

[0055] S4632: If the i-th group of non-motor vehicles cannot reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the i-th extension time of the right-turn red light for motor vehicles is zero, and a reminder warning horn is used to broadcast.

[0056] Optionally, when the total duration of the right turn at the red light of the motor vehicle is obtained, a comparison formula is used to determine the final total duration of the right turn at the red light of the motor vehicle, and the comparison formula is:

[0057]

[0058] Where, t bcr The basic duration of a right turn on a red light for a motor vehicle: Indicates the first extension time of the red light for a motor vehicle to turn right. represents the i-th extension time of the right turn red light for motor vehicles, T G Indicates the duration of the green light for going straight and turning left, T Y Indicates the duration of the yellow light for going straight and turning left.

[0059] Embodiments of the present invention include the following benefits:

[0060] The present invention obtains information about roads and non-motor vehicles through field surveys and roadside detectors, senses the arrival characteristics of non-motor vehicles, and determines the timing plan for motor vehicles to turn right at red lights in real time. This can reduce conflicts between right-turning motor vehicles and straight-moving non-motor vehicles, enhance the safety level of roads, reduce delay time for right-turning motor vehicles, and improve intersection operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0062] Figure 1 is a flow chart of a method for designing timing of an inductive right-turn signal for a motor vehicle according to an embodiment of the present invention;

[0063] Figure 2This is one of the flow charts of a specific application of an inductive motor vehicle right turn signal timing design method according to an embodiment of the present invention;

[0064] Figure 3 This is a second flow chart of a specific application of an inductive motor vehicle right turn signal timing design method according to an embodiment of the present invention;

[0065] Figure 4 This is a flowchart of a specific application of a method for designing timing of an inductive motor vehicle right turn signal according to an embodiment of the present invention;

[0066] Figure 5 This is a fourth flow chart of a specific application of an inductive motor vehicle right turn signal timing design method according to an embodiment of the present invention;

[0067] Figure 6 This is a schematic diagram of the intersection. DETAILED DESCRIPTION

[0068] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0069] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0071] According to an embodiment of the present invention, a method for designing timing of an inductive right turn signal for a motor vehicle is provided.

[0072] The present invention is further described with reference to the accompanying drawings and specific embodiments. Figure 1-6 As shown, Figure 2-Figure 5 This is a flow chart of the specific application of the present invention, Figure 2 The middle line ① and Figure 3 The lines in ① connect, Figure 3 Lines ②, ③ and ④ in Figure 4 Lines ②, ③ and ④ are connected. Figure 4Lines ⑤, ⑥ and ⑦ in Figure 5 The lines ⑤, ⑥ and ⑦ in FIG. 5 are connected. According to the inductive motor vehicle right turn signal timing design method according to an embodiment of the present invention, the inductive motor vehicle right turn signal timing design method comprises the following steps:

[0073] S1. Obtain the design parameters of the inductive right turn signal timing for motor vehicles through field research.

[0074] The design parameters include the average speed of non-motor vehicles crossing the street v b , the average walking speed of pedestrians crossing the street v p , the average speed of the car turning right v c , average length of non-motor vehicles L b , the length of the trajectory of the straight non-motor vehicle to the point of conflict with the right-turning motor vehicle is L bs , the length of the trajectory from the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle is L bl , the length of the right-turning motor vehicle's trajectory to the point of conflict with the left-turning non-motor vehicle is L c1 The length of the right-turning motor vehicle's trajectory to the point of conflict with the straight-moving non-motor vehicle is L c1 +L c2 , the length of the right-turning motor vehicle's trajectory to the point of conflict with the pedestrian crossing the street is L c1 +L c2 +L c3 , the walking trajectory length W of pedestrians crossing the street in the same direction to the conflict point with the right-turning motor vehicle p , the walking trajectory length W′ of the pedestrian crossing the street to the conflict point with the right-turning motor vehicle p , the green light duration for going straight and turning left is T G , yellow light duration for going straight and turning left is T Y .

[0075] S2. Obtain information on pedestrians crossing the street and non-motor vehicle traffic by setting up road test equipment at a predetermined distance from the stop line of the non-motor vehicle lane and at the corner of the intersection.

[0076] In a further embodiment, by setting up a road test device at a predetermined distance from the stop line of the non-motorized vehicle lane and at the corner of the intersection, obtaining the pedestrian crossing information and the non-motorized vehicle flow information includes the following steps:

[0077] S21, setting a non-motor vehicle speed and arrival time cross-section detector and a reminder warning horn at a predetermined distance L0 from the stop line of the non-motor vehicle lane;

[0078] S22. Install non-motor vehicle and pedestrian queue length detectors at the intersection corners;

[0079] S23, recording the time when the straight and left turn green lights are on as the initial time zero, and using a non-motor vehicle and pedestrian queue length detector to measure and obtain pedestrian crossing information and non-motor vehicle traffic information.

[0080] In a further embodiment, the pedestrian crossing information and non-motor vehicle traffic information include the length of non-motor vehicle queues in the same direction, the length of pedestrian queues in the same direction, and the length of pedestrian queues in the opposite direction.

[0081] S3. Calculate the basic duration of a right turn at a red light for motor vehicles based on the obtained pedestrian information, non-motor vehicle traffic information and design parameters.

[0082] In a further embodiment, based on the obtained pedestrian information, non-motor vehicle traffic information and design parameters, calculating the basic duration of the right turn red light for motor vehicles includes the following steps:

[0083] S31. At the initial time zero, if the length of the non-motor vehicle queue in the same direction, the length of the pedestrian queue in the same direction, and the length of the pedestrian queue in the opposite direction are all zero, then the basic duration of the right turn red light for motor vehicles is zero, that is, t bcr =0;

[0084] S32. If any of the lengths of the queue of non-motor vehicles in the same direction, the lengths of the queue of pedestrians in the same direction, and the lengths of the queue of pedestrians in the opposite direction is not zero, the basic duration of the right turn on a red light for motor vehicles is calculated. The calculation formula for the basic duration of the right turn on a red light for motor vehicles is:

[0085]

[0086] Where, L bl It represents the length of the trajectory from the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle, L b0 Indicates the length of the non-motor vehicle queue in the same direction, L b Represents the average length of non-motor vehicles, L bs Indicates the length of the trajectory of the straight-moving non-motor vehicle to the point of conflict with the right-turning motor vehicle;

[0087] W p W represents the walking trajectory length of pedestrians crossing the street in the same direction to the conflict point with right-turning vehicles, p0 represents the length of the same-direction pedestrian queue, W′ p W′ represents the walking trajectory length of the pedestrian crossing the street to the conflict point with the right-turning motor vehicle. p0 Indicates the length of the opposite pedestrian queue;

[0088] v b represents the average speed of non-motor vehicles crossing the street, v p Indicates the average walking speed of pedestrians crossing the street.

[0089] S4. Calculate the extension time of the right turn red light for motor vehicles based on the arrival characteristics of pedestrians and non-motor vehicles.

[0090] In a further embodiment, based on the analysis of the arrival characteristics of pedestrians and non-motor vehicles, calculating the extension time of the right turn red light for motor vehicles includes the following steps:

[0091] S41, when n=1, record the nth i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time Where i represents the number of non-motor vehicle cluster queues passing through the non-motor vehicle speed and arrival time cross-section detector, i = 1, 2, 3..., n i represents the nth non-motor vehicle in the i-th non-motor vehicle cluster, n=1, 2, 3, ..., the initial value of i is 1;

[0092] S42, record the (n+1)th i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time

[0093] S43, judging whether the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector is a cluster queue, and the judging formula is:

[0094]

[0095] Where, L b represents the average length of non-motor vehicles;

[0096] S44, if the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector satisfies the judgment formula, assign n+1 to n, and execute S42-S43 in a loop;

[0097] S45. If the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector does not satisfy the judgment formula, the average speed of the non-motor vehicle cluster queue is calculated:

[0098]

[0099] S46. Calculate the extended time of the right turn red light for motor vehicles based on the average speed of the non-motor vehicle cluster queue, the number of non-motor vehicle cluster queues, and the calculated value of the basic time of the right turn red light for motor vehicles.

[0100] In a further embodiment, according to the average speed of the non-motor vehicle group queue, the number of the non-motor vehicle group queue and the calculated value of the basic duration of the right turn red light for motor vehicles, calculating the extended duration of the right turn red light for motor vehicles includes the following steps:

[0101] S461. If the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, it is determined whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turn motor vehicle, and the first extension duration of the right-turn red light for motor vehicles is calculated; that is, the following formula needs to be satisfied during the determination:

[0102]

[0103] S462, if the basic duration of the right-turn red light for motor vehicles is equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, determine whether the first group of non-motor vehicle cluster queues can reach the stop line before the right-turn motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, and calculate the first extension duration of the right-turn red light for motor vehicles; that is, the following formula needs to be satisfied when making the determination:

[0104]

[0105] S463, if the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is greater than or equal to two, it is determined whether the i-th group of non-motor vehicle queues can reach the stop line before the i-1-th group of non-motor vehicle queues pass through the conflict point with the right-turning motor vehicles, and the i-th extension duration of the right-turn red light for motor vehicles is calculated; that is, the following formula needs to be satisfied when making the determination:

[0106]

[0107] In the formula, represents the average speed of the i-1th group of non-motor vehicle queues.

[0108] S464. Add the first extension time of the right turn red light for the motor vehicle to the i-th extension time of the right turn red light for the motor vehicle to obtain the extension time of the right turn red light for the motor vehicle.

[0109] In a further embodiment, determining whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, and calculating the first extension time of the motor vehicle right-turn red light includes the following steps:

[0110] S4611. If the first group of non-motor vehicle clusters can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, the calculation formula for the first extension time of the right-turn red light for motor vehicles is:

[0111]

[0112] Where L0 represents the predetermined distance, L bs Indicates the length of the trajectory of the straight non-motor vehicle to the point of conflict with the right-turning motor vehicle, L blIndicates the length of the trajectory of the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle;

[0113] represents the time when the nth non-motor vehicle in the first non-motor vehicle cluster passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the first non-motor vehicle in the first non-motor vehicle cluster passes through the non-motor vehicle speed and arrival time cross-section detector;

[0114] represents the average speed of the first non-motor vehicle cluster queue;

[0115] Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector;

[0116] S4612: If the first group of non-motor vehicle clusters cannot reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, the first extension time of the right-turn red light for motor vehicles is zero, that is, And broadcast "Please slow down and watch out for motor vehicles turning right on the left" on the right side of the non-motorized vehicle lane.

[0117] In a further embodiment, determining whether the first group of non-motor vehicle cluster queues can reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-moving and left-turning non-motor vehicles, and calculating the first extension time of the right-turn red light of the motor vehicle includes the following steps:

[0118] S4621, if the first group of non-motor vehicle cluster queues can reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is calculated using the calculation formula for the first extension time of the right-turn red light for motor vehicles in S4611, i+1 is assigned to i, and the process returns to S42-S45 and executes in sequence, and continues to judge the next time the non-motor vehicle queue arrives at the non-motor vehicle speed and arrival time cross-section detector;

[0119] S4622. If the first group of non-motor vehicles cannot reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-moving or left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is zero, and a broadcast "Please slow down, watch out for the motor vehicle on the left turning right" is played on the right side of the non-motor vehicle lane.

[0120] In a further embodiment, determining whether the i-th group of non-motor vehicle queues can reach the stop line before the i-1-th group of non-motor vehicle queues pass the conflict point with the right-turning motor vehicle, and calculating the i-th extension time of the right-turn red light for motor vehicles includes the following steps:

[0121] S4631. If the i-th group of non-motor vehicles can reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the calculation formula for the i-th extension time of the right-turn red light for motor vehicles is:

[0122]

[0123] In the formula, represents the time when the nth non-motor vehicle in the i-th non-motor vehicle cluster queue passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the nth non-motor vehicle in the i-1th non-motor vehicle cluster queue passes the non-motor vehicle speed and arrival time cross-section detector;

[0124] Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector;

[0125] S4632. If the i-th group of non-motor vehicles cannot reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the i-th extension time of the right-turn red light for motor vehicles is zero, and the warning horn broadcasts "Please slow down, pay attention to the motor vehicle on the left turning right".

[0126] S5. Compare the sum of the duration of the green light for going straight and turning left and the duration of the yellow light for going straight and turning left, and the sum of the basic duration of the red light for motor vehicles to turn right and the extended duration of the red light for motor vehicles to turn right, to obtain the total duration of the red light for motor vehicles to turn right.

[0127] The calculation formula for the sum of the basic duration of the right-turn red light for motor vehicles and the extended duration of the right-turn red light for motor vehicles is:

[0128] t cr =t bcr +t ecr ;

[0129] Where, t bcr Indicates the basic duration of a motor vehicle turning right at a red light, t ecr Indicates the extension time of the red light for motor vehicles to turn right.

[0130] In a further embodiment, when the total time of the motor vehicle turning right at a red light is obtained, a comparison formula is used to determine the final total time of the motor vehicle turning right at a red light, and the comparison formula is:

[0131]

[0132] Where, t bcr The basic duration of a right turn on a red light for a motor vehicle: Indicates the first extension time of the red light for a motor vehicle to turn right. represents the i-th extension time of the right turn red light for motor vehicles, TG Indicates the duration of the green light for going straight and turning left, T Y Indicates the duration of the yellow light for going straight and turning left.

[0133] In one embodiment, an electronic device is also provided, including a memory and a processor, the memory is used to store a program that supports the processor to execute the method for designing the timing of an inductive motor vehicle right turn signal, and the processor is configured to execute the program stored in the memory.

[0134] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for designing timing of an inductive right-turn signal for a motor vehicle are executed.

[0135] To sum up, the present invention obtains information about roads and non-motor vehicles through field surveys and roadside detectors, senses the arrival characteristics of non-motor vehicles, and determines the timing plan for motor vehicles to turn right at red lights in real time. This can reduce conflicts between right-turning motor vehicles and straight-moving non-motor vehicles, enhance the safety level of roads, reduce the delay time of right-turning motor vehicles, and improve the operating efficiency of intersections.

[0136] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional charging modules / units in the systems and devices may be implemented as software, firmware, hardware, or appropriate combinations thereof.

[0137] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0138] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for designing timing of an inductive right turn signal for a motor vehicle, characterized in that: The inductive motor vehicle right turn signal timing design method comprises the following steps: S1. Obtaining design parameters for the timing of the inductive motor vehicle right turn signal; S2. Obtain information on pedestrians crossing the street and non-motor vehicle flow by setting up road test equipment at a predetermined distance from the stop line of the non-motor vehicle lane and at the corner of the intersection; S3, based on the obtained pedestrian information, non-motor vehicle traffic information and design parameters, calculate the basic duration of the right turn red light for motor vehicles; S4. Calculate the extension time of the right turn red light for motor vehicles based on the arrival characteristics of pedestrians and non-motor vehicles; S5. Compare the sum of the duration of the green light for going straight and turning left and the duration of the yellow light for going straight and turning left, and the sum of the basic duration of the red light for turning right for motor vehicles and the extended duration of the red light for turning right for motor vehicles, to obtain the total duration of the red light for turning right for motor vehicles; The calculation of the extension time of the right turn red light for motor vehicles based on the arrival characteristics analysis of pedestrians and non-motor vehicles comprises the following steps: S41, record the nth i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time Where i represents the number of non-motor vehicle cluster queues passing through the non-motor vehicle speed and arrival time cross-section detector, n i represents the nth non-motor vehicle in the i-th non-motor vehicle cluster queue; S42, record the (n+1)th i The speed of a non-motor vehicle passing the non-motor vehicle speed and the speed of the cross-section detector at the time of arrival and time S43, judging whether the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector is a cluster queue, and the judging formula is: Where, L b It represents the average length of non-motor vehicles; S44, if the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector satisfies the judgment formula, assign n+1 to n, and execute S42-S43 in a loop; S45, if the non-motor vehicle queue passing through the non-motor vehicle speed and arrival time cross-section detector does not satisfy the judgment formula, then calculating the average speed of the non-motor vehicle cluster queue; S46, calculating the extended time of the right turn red light for motor vehicles according to the average speed of the non-motor vehicle cluster queue, the number of the non-motor vehicle cluster queue and the calculated value of the basic time of the right turn red light for motor vehicles; The method of calculating the extended duration of a right turn red light for motor vehicles according to the average speed of the non-motor vehicle cluster queue, the number of the non-motor vehicle cluster queue and the calculated value of the basic duration of a right turn red light for motor vehicles comprises the following steps: S461, if the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, determine whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turn motor vehicle, and calculate the first extension duration of the right-turn red light for motor vehicles; S462, if the basic duration of the right-turn red light for motor vehicles is equal to zero and the value i of the number of non-motor vehicle cluster queues is equal to one, determine whether the first group of non-motor vehicle cluster queues can reach the stop line before the right-turn motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, and calculate the first extension duration of the right-turn red light for motor vehicles; S463, if the basic duration of the right-turn red light for motor vehicles is not equal to zero and the value i of the number of non-motor vehicle cluster queues is greater than or equal to two, determine whether the i-th group of non-motor vehicle queues can reach the stop line before the i-1-th group of non-motor vehicle queues pass through the conflict point with the right-turning motor vehicles, and calculate the i-th extension duration of the right-turn red light for motor vehicles; S464. Add the first extension time of the right turn red light for the motor vehicle to the i-th extension time of the right turn red light for the motor vehicle to obtain the extension time of the right turn red light for the motor vehicle.

2. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 1, characterized in that: The method of obtaining pedestrian crossing information and non-motor vehicle flow information by setting up a road test device at a predetermined distance from the stop line of the non-motor vehicle lane and at the corner of the intersection includes the following steps: S21. Install a non-motor vehicle speed and arrival time cross-section detector and a warning horn at a predetermined distance from the stop line of the non-motor vehicle lane; S22. Install non-motor vehicle and pedestrian queue length detectors at the intersection corners; S23, recording the time when the straight and left turn green lights are on as the initial time zero, and using a non-motor vehicle and pedestrian queue length detector to measure and obtain pedestrian crossing information and non-motor vehicle traffic information.

3. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 2, characterized in that: The pedestrian crossing information and non-motor vehicle traffic information include the length of non-motor vehicle queues in the same direction, the length of pedestrian queues in the same direction, and the length of pedestrian queues in the opposite direction.

4. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 3, characterized in that: The calculation of the basic duration of a right turn red light for motor vehicles based on the obtained pedestrian information, non-motor vehicle traffic information and design parameters comprises the following steps: S31. If the length of the queue of non-motor vehicles in the same direction, the length of the queue of pedestrians in the same direction, and the length of the queue of pedestrians in the opposite direction are all zero, then the basic duration of the right turn red light for motor vehicles is zero; S32. If any of the lengths of the queue of non-motor vehicles in the same direction, the lengths of the queue of pedestrians in the same direction, and the lengths of the queue of pedestrians in the opposite direction is not zero, the basic duration of the right turn on a red light for motor vehicles is calculated. The calculation formula for the basic duration of the right turn on a red light for motor vehicles is: Where, L bl It represents the length of the trajectory from the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle, L b0 Indicates the length of the non-motor vehicle queue in the same direction, L b represents the average length of non-motor vehicles, L bs Indicates the length of the trajectory of the straight-moving non-motor vehicle to the point of conflict with the right-turning motor vehicle; W p W represents the walking trajectory length of pedestrians crossing the street in the same direction to the conflict point with right-turning vehicles, p0 represents the length of the same-direction pedestrian queue, W′ p W′ represents the walking trajectory length of the pedestrian crossing the street to the conflict point with the right-turning motor vehicle. p0 Indicates the length of the opposite pedestrian queue; v b represents the average speed of non-motor vehicles crossing the street, v p Indicates the average walking speed of pedestrians crossing the street.

5. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 1, characterized in that: Determining whether the first group of non-motor vehicle cluster queues can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, and calculating the first extension time of the right-turn red light for motor vehicles includes the following steps: S4611. If the first group of non-motor vehicle clusters can reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicle, the calculation formula for the first extension time of the right-turn red light for motor vehicles is: Where L0 represents the predetermined distance, L bs Indicates the length of the trajectory of the straight non-motor vehicle to the point of conflict with the right-turning motor vehicle, L bl Indicates the length of the trajectory of the left-turning non-motor vehicle to the point of conflict with the right-turning motor vehicle; represents the time when the nth non-motor vehicle in the first non-motor vehicle cluster passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the first non-motor vehicle in the first non-motor vehicle cluster passes through the non-motor vehicle speed and arrival time cross-section detector; represents the average speed of the first non-motor vehicle cluster queue; Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector; S4612: If the first group of non-motor vehicle cluster queues cannot reach the stop line before the initial non-motor vehicle queue passes the conflict point with the right-turning motor vehicles, the first extension time of the right-turn red light for motor vehicles is zero, and a broadcast is played on the right side of the non-motor vehicle lane.

6. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 5, characterized in that: Determining whether the first group of non-motor vehicle clusters can reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-moving and left-turning non-motor vehicles, and calculating the first extension time of the right-turn red light of the motor vehicle includes the following steps: S4621, if the first group of non-motor vehicle cluster queues can reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-going and left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is calculated using the calculation formula for the first extension time of the right-turn red light for motor vehicles in S4611, i+1 is assigned to i, and the process returns to S42-S45 and executes in sequence, and continues to judge the next time the non-motor vehicle queue arrives at the non-motor vehicle speed and arrival time cross-section detector; S4622. If the first group of non-motor vehicle clusters cannot reach the stop line before the right-turning motor vehicle reaches the conflict point with the straight-moving or left-turning non-motor vehicles, the first extension time of the right-turn red light for motor vehicles is zero, and a broadcast is played on the right side of the non-motor vehicle lane.

7. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 6, characterized in that: Determining whether the i-th group of non-motor vehicles can reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicle, and calculating the i-th extension time of the right-turn red light for motor vehicles includes the following steps: S4631. If the i-th group of non-motor vehicles can reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the calculation formula for the i-th extension time of the right-turn red light for motor vehicles is: In the formula, represents the time when the nth non-motor vehicle in the i-th non-motor vehicle cluster passes the non-motor vehicle speed and arrival time cross-section detector, represents the time when the nth non-motor vehicle in the i-1th non-motor vehicle cluster queue passes the non-motor vehicle speed and arrival time cross-section detector; Assign i+1 to i, return to S42-S45 and execute in sequence, and continue to judge the situation of the next non-motor vehicle queue arriving at the non-motor vehicle speed and arrival time cross-section detector; S4632: If the i-th group of non-motor vehicles cannot reach the stop line before the i-1-th group of non-motor vehicles passes the conflict point with the right-turning motor vehicles, the i-th extension time of the right-turn red light for motor vehicles is zero, and a reminder warning horn is used to broadcast.

8. The method for designing timing of an inductive right turn signal for a motor vehicle according to claim 1, characterized in that: When obtaining the total duration of the right turn at the red light for the motor vehicle, a comparison formula is used to determine the final total duration of the right turn at the red light for the motor vehicle, and the comparison formula is: Where, t bcr The basic duration of a right turn on a red light for a motor vehicle: Indicates the first extension time of the red light for a motor vehicle to turn right. represents the i-th extension time of the right turn red light for motor vehicles, T G Indicates the duration of the green light for going straight and turning left, T Y Indicates the duration of the yellow light for going straight and turning left.

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