CN111127872B - Control method of straight-right variable guide lane considering pedestrian and right-turn vehicle collision - Google Patents

Control method of straight-right variable guide lane considering pedestrian and right-turn vehicle collision Download PDF

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CN111127872B
CN111127872B CN201911254608.6A CN201911254608A CN111127872B CN 111127872 B CN111127872 B CN 111127872B CN 201911254608 A CN201911254608 A CN 201911254608A CN 111127872 B CN111127872 B CN 111127872B
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CN111127872A (en
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王昊
卢云雪
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Southeast University
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    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/005Traffic control systems for road vehicles including pedestrian guidance indicator
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
    • G08G1/07Controlling traffic signals
    • GPHYSICS
    • G08SIGNALLING
    • G08GTRAFFIC CONTROL SYSTEMS
    • G08G1/00Traffic control systems for road vehicles
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Abstract

The invention discloses a control method of a direct-right variable guide lane considering the conflict between pedestrians and right-turning vehicles, which can timely switch the function of an entrance lane variable guide lane between the direct-right lane and a right-turning special lane, and reduce the conflict between right-turning traffic and street-crossing pedestrians under the condition of considering the traffic efficiency of direct traffic. The method mainly comprises the steps of obtaining road and traffic information of an intersection, estimating the proportion of right-turning vehicles in a straight right-turning guide lane, estimating the saturated traffic capacity of right-turning traffic in green light time, and judging the function of a variable guide lane based on the traffic capacity of the right-turning traffic. The invention can convert the function of the variable guide lane into the right-turning special purpose when the conflict between the street-crossing pedestrian and the right-turning vehicle is increased, prevent the straight-going vehicle from entering the lane with low traffic efficiency and ensure the traffic operation safety of the intersection. And when the conflict between the right-turning vehicle and the pedestrian crossing the street is not serious, the variable guide lane is converted into the straight right shared lane, and the space-time resource utilization rate of the road intersection is improved.

Description

Control method of straight-right variable guide lane considering pedestrian and right-turn vehicle collision
Technical Field
The invention relates to the field of traffic management and control, in particular to a method for estimating the proportion of straight right vehicles in a straight right variable guide lane, calculating the saturated traffic capacity of right turn traffic and judging the function switching of the variable guide lane under the condition of considering the conflict between pedestrians crossing the street and right turn vehicles at an intersection.
Background
Generally, when the flow of the right-turn vehicle is less than 300veh/h/ln, or the flow of the straight-going vehicle is not more than 450veh/h/ln, and the space condition limits, the right-turn special entrance lane is not arranged, and the right-turn vehicle can obtain the right of way during the red light period of the straight-going vehicle by adopting a mode of sharing the rightmost guide lane by the right-turn and the straight-going. The dynamic property of the traffic flow enables the straight-going and right-turning traffic flow in different time periods to be changed constantly, the dynamic property of the traffic flow is adapted by changing a signal timing scheme of an intersection generally, and the method is difficult to well improve the conflict between right-turning vehicles and straight-going traffic flow in the same direction and between right-turning vehicles and street-crossing pedestrians and non-motor vehicles caused by the increase of the right-turning flow for an entrance lane without a right-turning special guide lane. At present, most of space resource optimization aiming at an intersection entrance lane focuses on how to match traffic demands of a guide lane with left-turn traffic flow and straight-going traffic flow, and the problems that the straight-going traffic flow passing efficiency is low, pedestrian and vehicle conflict and upgrade at the intersection and the like caused by the influence of right-turn traffic flow on the straight-going traffic flow and street-crossing pedestrian flow are ignored. When the mixed traffic phenomenon at the intersection is obvious, the right-turn traffic flow conflicts with pedestrians, non-motor vehicles and equidirectional motor vehicle flows, the influence on the traffic safety and traffic efficiency of the intersection is large, and an effective right-turn traffic flow control mode is found to be an important link for improving the traffic running environment of the road.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides a control method of a direct-right variable guide lane considering the conflict between pedestrians and right-turning vehicles, aiming at enabling the variable guide lane to respond to the traffic running states among direct traffic flow, right-turning traffic flow and street-crossing pedestrians in real time through the optimized distribution of space resources of an intersection entrance lane, reducing the conflict between the right-turning traffic flow and the same-direction motor vehicles, non-motor vehicles and pedestrians, guaranteeing the traffic running safety of the intersection and improving the traffic flow passing efficiency at the same time.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a method for controlling a straight-right variable guide lane considering a collision between a pedestrian and a right-turn vehicle, comprising the steps of:
(1) and acquiring geometric information, intersection timing information and traffic state information of the target entrance road of the road intersection. Specifically, an acquired intersection approach laneThe geometrical information of (2) includes: number n of straight special guide lanessAnd a sidewalk width w; the acquired intersection timing information includes: straight green time g of target entrance lanesAnd a signal period T; the acquired traffic state information includes: straight and right-turn traffic flow q of target entrance lanesAnd q isrStreet pedestrian flow lambda of the approach lane adjacent to the target approach lane in the counterclockwise directionpThe queuing length after the period green light time on the straight and straight right guide lanes of the target entrance lane is finished:
Figure BDA0002309881130000021
and L'srThe queuing length of the straight and straight right guide lanes before the start of the green light time of the period is as follows:
Figure BDA0002309881130000022
and Lsr
(2) When the variable guide lane function is a straight right shared lane, the proportion of right-turn vehicles in the queue before the green light time starts is estimated according to the ratio of the right-turn traffic flow to the straight traffic flow, the number of the straight special guide lanes and the queue length of straight and right-turn vehicles after the end of the green light time of the last period and before the start of the green light time of the period. Specifically, the right-turn vehicle ratio in the straight right entrance lane queue before the green time is started is estimated by analyzing the distribution of the straight-going vehicles and the right-turn vehicles in the corresponding guide lanes of the entrance lane, and the right-turn vehicle ratio in the straight right guide lane is obtained as
Figure BDA0002309881130000023
Wherein theta is the ratio of the right-turn traffic flow to the straight traffic flow, L'srThe length of queue after the period of green light on the straight right guide lane is finished, LsrThe length of the queue before the start of the green time of the period of the straight right guide lane, nsFor the number of straight-going dedicated guide lanes,
Figure BDA0002309881130000024
for the average queue length of the straight guide lanes,
Figure BDA0002309881130000025
the average queue length on the straight guide lane at the end of the green light of the last period.
(3) Calculating the saturated traffic capacity of the right-turn traffic in the green time when the function of the variable guide lane is that the right-turn traffic is straight and shared:
Figure BDA0002309881130000026
wherein, betarThe right-turn vehicle in the straight right guide lane is occupied,
Figure BDA0002309881130000027
the time when the pedestrian crossing the street in the initial stage of the green light passes through the conflict area with the right turn traffic, alpha is the minimum gap which can be penetrated by the right turn traffic, alpha0Minimum headway, lambda, for right-turning vehicles to pass continuously through the intersectionpPedestrian crossing flow, g, for the inlet lane adjacent in the counter-clockwise directionrFor right turn, green time, g when going straight to the right common guide laner=gs
If the right-turn traffic flow is smaller than the saturated traffic capacity of the right-turn traffic flow during the green light period, the lane function is kept to be shared right and straight; if the right-turn traffic flow capacity of the variable guide lane cannot meet the right-turn requirement, the function of the variable guide lane is converted into a right-turn special lane, and at the moment, right-turn vehicles all have the right of way in the period under the rule of courtesy pedestrians.
(4) When the function of the variable guide lane is a right-turn exclusive lane, if the flow rate of the right-turn traffic is less than the saturated traffic capacity of the right-turn vehicle in the green time:
Figure BDA0002309881130000028
the proportional estimated value of the right-turn vehicle in the straight right guide lane at the moment is as follows:
Figure BDA0002309881130000029
if the right-turn traffic is less than NrThe special guide lane for right turning can be changed into the straight and right shared guide lane, thereby improving the passing efficiency of straight vehicles。
Has the advantages that: compared with the prior art, the invention has the advantages that: 1. under the condition that the conflict between the right-turn traffic flow and the pedestrian flow crossing the street is considered, the control method of the straight right variable guide lane of the intersection is provided, the flexibility of optimizing the space resources of the intersection entrance lane is improved, the conflict between the pedestrians and the vehicles in the intersection is reduced, and the running order and the running safety of the intersection are guaranteed; 2. the proportion of the straight vehicles and the right-turning vehicles in the straight-right shared lane is estimated innovatively according to the queuing conditions of the straight lane and the straight-right lane of the entrance lane and the proportion of the right-turning traffic flow and the straight traffic flow; 3. the method fully considers the impact of the right-turn traffic flow on the motor vehicles in the same direction, the non-motor vehicles and the pedestrians, and corrects the saturated flow rate obtained by the insertable clearance theory, so that the method is more in line with the traffic characteristics of the right-turn traffic flow and the pedestrians crossing the street.
Drawings
Fig. 1 is a flowchart of a direct-right variable guidance lane control method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of intersection approach channeling in an embodiment of the invention.
Fig. 3 is a schematic diagram of the collision between the right-turn traffic flow and the pedestrian crossing the street in the embodiment of the invention.
Fig. 4 is a schematic diagram of the control phase of the right-turn traffic signal in the embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The embodiment of the invention discloses a control method of a direct-right variable guide lane considering the conflict between pedestrians and right-turning vehicles, which is suitable for a signal control intersection, is provided with a pedestrian street crossing signal, and is used under the condition that the right-turning traffic flow is not separated by a diversion island, and a control flow chart is shown in figure 1. The method mainly comprises the steps of right-turn vehicle proportion estimation in a straight right guide lane, right-turn traffic flow capacity analysis and variable guide lane function judgment. The right turn traffic flow passing capacity calculation is to calculate the passing capacity of the right turn traffic flow in the green light time when the right turn traffic flow and the straight traffic flow share the passing right by improving the traditional passing clearance theory; the variable guide lane function determination measures the matching relationship between the demand and the supply, thereby determining whether the lane function is changed. Specifically, the control method of the straight right variable guide lane considering the collision of the pedestrian and the right-turning vehicle comprises the following steps:
(1) the method comprises the following steps of collecting geometric information, intersection timing information and traffic state information of an intersection target entrance lane, wherein the geometric information comprises the following steps: number n of straight special guide lanessAnd a sidewalk width w; in this example, the intersection phase scheme is a symmetric passing scheme, and the intersection timing information includes: green time g of straight traffic flow at target entrance lanesAnd a signal period T; the traffic state information can be acquired from fixed detection equipment at the intersection or by means of video detection and the like, and mainly comprises the following steps: straight and right-turn traffic flow q of target entrance lanesAnd q isrAnd pedestrian crossing rate lambda of the target entrance lane counter-clockwise adjacent to the entrance lanep(ii) a The queuing length of the straight guide lane and the straight right guide lane after the green light time of the last period is finished:
Figure BDA0002309881130000041
and L'srThe queuing lengths of the straight and straight right guide lanes before the green time of the cycle are as follows:
Figure BDA0002309881130000042
and Lsr
(2) And estimating the right-turn vehicle ratio in the straight right entrance way queue before the green time begins by analyzing the distribution of the straight vehicles and the right-turn vehicles on each guide lane of the entrance way. When the straight right variable guide lane functions as a straight right common lane, the right-turning vehicles arriving during the red light can only drive into the straight right guide lane, and the straight vehicles can select the guide lane with shorter queue from the straight right guide lane and the straight right guide lane. Easily guessed that when the right-turn traffic flow is small, the queuing lengths on the straight special guide lane and the straight right common guide lane are not greatly different, and the proportion of straight vehicles in the straight right common guide lane is large; when the right-turn traffic is large, the right-turn vehicles can only enter the straight right common guide lane, so that the number of the right-turn vehicles in the straight right common guide lane is large, the straight traffic ratio is small, and the queuing length of the straight right guide lane exceeds that of the straight special lane if the right-turn traffic is large enough.
The analysis was as follows:
firstly, before the green light of the straight traffic flow of the target entrance lane in the current period starts, the number m of right-turning vehicles in the straight right guide lanerIt should be equal to the sum of the right-turn vehicle stuck in the lane and the right-turn vehicle arriving during the red light of the last cycle: m isr=βrL′sr+qr(T-gr) Wherein beta isrThe proportion of the right-turning vehicles in the straight right guide lane after the green light of the last period is finished can be assumed that the proportion of the right-turning vehicles in the last period is the same as that in the present period, and then
Figure BDA0002309881130000043
The number m of straight vehicles in the straight right guide lane before the start of the green light of the straight traffic flow in the current period of the target entrance lanesThe sum of the number of vehicles on the straight-driving special entrance lane and the number of vehicles staying on all the straight-driving special lanes after the green light of the upper period is finished, the number of straight-driving vehicles in the straight-right guide lane and the number of straight-driving vehicles arriving during the red light period is equal to the sum of:
Figure BDA0002309881130000044
wherein
Figure BDA0002309881130000045
The average queuing length on the special inlet lane for straight-going before the straight-going green light starts in the period is as follows:
Figure BDA0002309881130000046
βsfor the proportion of the straight vehicles in the straight right guide lane after the green light of the previous period is finished, if the proportion of the straight vehicles in the previous period is the same as that in the current period, the proportion of the straight vehicles in the right guide lane is the same as that in the previous period
Figure BDA0002309881130000047
③ of straight right guide laneThe queuing length should be equal to the sum of the number of straight vehicles and the number of right-turn vehicles in the lane: l issr=ms+mr
The ratio of the right-turn traffic flow to the straight-going traffic flow is taken as
Figure BDA0002309881130000048
And (4) analyzing to obtain the proportion of right-turning vehicles in the straight right guide lane by combining the first step and the second step:
Figure BDA0002309881130000049
(3) the traditional insertable clearance theory is improved, and the saturated traffic capacity in the green light time of the right-turn traffic is calculated. When a right-turning vehicle passes in the green light period of the same-direction straight-going traffic, street-crossing pedestrians on an adjacent entrance lane in the counterclockwise direction need to be avoided, and a proper pedestrian gap is found to pass through the intersection, so that the pedestrians in the direction are taken as the main flow direction, and the right-turning traffic flow is taken as the secondary flow direction. Different from the conventional calculation method for calculating the alternate opposite-direction straight traffic flow of the left-turn traffic flow, in this scenario, it is necessary to consider: firstly, pedestrians crossing the street at the initial stage of the green light seize a conflict area to pass through in groups, no clearance for right-turning vehicles to pass through is usually available in the time period, and the right-turning vehicles can only wait for the pedestrians to pass through in groups and then find accessible clearances among the pedestrians crossing the street at random; secondly, in the secondary traffic, besides the right-turning vehicles, a certain proportion of straight-going vehicles exist, which also affects the traffic capacity of the right-turning traffic during the green light period. The corrected right-turn traffic capacity is therefore:
Figure BDA0002309881130000051
wherein
Figure BDA0002309881130000052
The time when the pedestrian crossing the street in the initial stage of the green light passes through the conflict area with the right turn traffic, alpha is the minimum gap which can be penetrated by the right turn traffic, alpha0The minimum headway for a right-turning vehicle to continuously pass through the intersection.
The recommended values of the parameters are as follows:
Figure BDA0002309881130000053
the value of can be according to the pedestrian number, the pavement width that arrive during the red light, pedestrian crossing street speed comprehensive determination, can estimate to be:
Figure BDA0002309881130000054
wherein w is the width of the street sidewalk, wcThe width of a collision area between right-turn traffic and pedestrians is generally 4 m; when a left-turning traffic flow passes through an opposite straight-going traffic flow, alpha is generally 5-7s, but in consideration of the actual situation in China, a right-turning vehicle is generally closer to a pedestrian and can be 3-4 s; alpha is alpha0The value is generally 3s, v is the speed of the pedestrian crossing the street, and the value is generally 3 km/h-5 km/h.
(4) The function of the variable guide lane is determined. The conversion of the straight-right variable guidance lane function requires a determination of the matching of the traffic state before and after the function conversion with the lane function. If the traffic capacity during the green light of the right-turn traffic flow cannot meet the traffic demand of the right-turn traffic flow:
qrT≥Nr
the function of the variable guide lane is changed from "straight right common" to "right turn exclusive", otherwise it remains unchanged.
When the function of the straight right variable guide lane is changed from "straight right common" to "right turn dedicated", the vehicle in both the straight and right turn flow direction is mixed in the rightmost guide lane. After the right-turn traffic flow is separated, in order to avoid the conflict with the pedestrians, the straight traffic flow is not released simultaneously with the straight traffic flow, so that the straight traffic in the rightmost guide lane queuing vehicles needs to be emptied before the lane function is changed. The original lane function is 'straight right sharing', so that the green light time of straight traffic flow of the target entrance lane in the original timing scheme is only required to be prolonged until the queuing vehicles at the initial stage of the green light completely pass through the intersection, and N is enabled to be started at the momentr=qrT is as follows:
Figure BDA0002309881130000055
wherein
Figure BDA0002309881130000061
In addition, after the function of the straight right variable guide lane is changed into 'right turning special', the flow rate ratio of the straight traffic flow is increased, and the signal timing scheme needs to be recalculated to meet the traffic demand of the straight traffic flow. The signal period calculation mode can refer to a Webster signal period calculation mode, and then green light time is distributed according to the flow rate ratio of each key traffic flow, wherein the flow rate ratio of the straight traffic flow is updated as follows:
Figure BDA0002309881130000062
STfor the straight-going single-lane saturated flow rate, 1800pcu/h is suggested.
(5) After the right-turn traffic flow obtains the right-turn special lane, if the right-turn traffic flow is less than the right-turn traffic flow according to the following conditions within 3 continuous periods
Figure BDA0002309881130000063
The estimated traffic capacity when the vehicle runs through the straight right shared lane can change the right-turning special guide lane into the straight right shared lane, and the traffic efficiency of straight traffic flow is improved. In the formula betarThe estimated values are:
Figure BDA0002309881130000064
when the function of the straight right variable guide lane is converted from 'special right turning' into 'straight right sharing', a transition period is not required to be set, and only a phase scheme and a timing scheme need to be adjusted. In the new phase scheme, the straight traffic and the right-turn traffic of the target entrance lane should be released simultaneously, and the new timing scheme should consider whether the traffic capacity of the right-turn traffic can meet the traffic demand in addition to the reduction of the straight traffic flow rate ratio.
After the lane function is changed, the flow rate ratio of the straight right lane group is:
Figure BDA0002309881130000065
wherein SRSuggesting values for right turn single lane saturation flow rates1650pcu/h, the minimum green time required to additionally meet the right turn traffic flow is:
Figure BDA0002309881130000066
wherein
Figure BDA0002309881130000067
The control method is further exemplified by taking a specific intersection entrance lane as an example, wherein the number n of the straight special guide laness2, the width w of the sidewalk is 3 m; in the intersection timing scheme, the green time of the straight traffic flow at the entrance road is gs30s, green time g 'of left turn traffic of counter clockwise adjacent approach lane'L30s, and the signal period T is 120 s; straight traffic flow qs800pcu/h, right turn traffic qr200pcu/h, street crossing pedestrian flow lambda of the entrance way which is adjacent to the target entrance way in the anticlockwise directionp200 persons/h. The road traffic detection facility detects that the queuing length (the number of vehicles) of each lane is equal to the number of vehicles at the end of the straight green light of the previous period
Figure BDA0002309881130000068
L′srBefore the green light of the straight-going green light begins in the period, the queuing length of each lane is 2
Figure BDA0002309881130000071
Lsr8. And taking values of other parameters: the minimum traversable clearance alpha of the right-turning vehicle for crossing the pedestrian is 3s, and the minimum headway alpha is obtained when the right-turning vehicle continuously passes03s, the width w of the collision area between the right-turn traffic flow and the pedestrianc4m, 5km/h, and the saturated flow rate S of straight traffic flowT1800pcu/h, right turn flow saturation flow rate SR=1650pcu/h。
When the straight-right variable guide lane function is used for straight-right sharing, whether the judgment condition of lane function conversion is met or not can be judged according to the current traffic state before the straight-going vehicle on the entrance lane is released, and the method specifically comprises the following steps:
(1) calculating the proportion of right-turning vehicles in the straight right guide lane as follows:
Figure BDA0002309881130000072
(2) the traffic capacity of the right-turn traffic during the green light is calculated. First, the loss of green time caused by pedestrian group crossing street at the initial stage of green light is estimated
Figure BDA0002309881130000073
Figure BDA0002309881130000074
Then, the traffic capacity during the green light period of the right-turn traffic is obtained as follows:
Figure BDA0002309881130000075
(3) and (3) judging the function of the variable guide lane:
before lane function conversion, whether the traffic capacity during the period of turning right to the green light meets the traffic demand of turning right:
Figure BDA0002309881130000076
therefore, when the straight-going and right-turning shared guide lane is used, the traffic capacity of the right-turning traffic cannot meet the traffic demand, and the function of the guide lane is switched to a right-turning special lane. Calculating the green light time when the function of the variable guide lane is transited:
Figure BDA0002309881130000077

Claims (4)

1. a control method of a straight right variable guide lane considering a collision of a pedestrian with a right-turn vehicle, characterized by comprising the steps of:
(1) acquiring geometric information, intersection timing information and traffic state information of a target entrance road of a road intersection;
(2) when the variable guide lane function is a straight right shared lane, estimating the proportion of right-turning vehicles in the queue before the green light time starts according to the ratio of the right-turning traffic flow to the straight traffic flow, the number of the straight special guide lanes and the queue length of straight and right-turning vehicles after the green light time of the last period is over and before the green light time of the period starts; wherein the right-turn vehicle ratio in the straight right entrance lane queue before the green time is started is estimated by analyzing the distribution of the straight vehicles and the right-turn vehicles in the corresponding guide lanes of the entrance lane, and the right-turn vehicle ratio in the straight right guide lane is obtained
Figure FDA0002687326410000011
Wherein theta is the ratio of the right-turn traffic flow to the straight traffic flow, L'srThe length of queue after the period of green light on the straight right guide lane is finished, LsrThe length of the queue before the start of the green time of the period of the straight right guide lane, nsFor the number of straight-going dedicated guide lanes,
Figure FDA0002687326410000012
for the average queue length of the straight guide lanes,
Figure FDA0002687326410000013
the average queuing length on the straight guide lane at the end of the green light of the last period;
(3) calculating the saturated traffic capacity of the right-turn traffic flow in the green light time when the function of the variable guide lane is that the right-turn traffic flow is directed to the right common lane; if the right-turn traffic flow is smaller than the saturated traffic capacity of the right-turn traffic flow during the green light period, the lane function is kept to be shared right and straight; if the right-turn traffic flow capacity of the variable guide lane cannot meet the right-turn requirement, the function of the variable guide lane is converted into a right-turn special lane, and right-turn vehicles all have the right of way in a period under the rule of courtesy pedestrians;
(4) when the function of the variable guide lane is a right-turn exclusive lane, if the flow rate of the right-turn traffic is less than the saturated traffic capacity of the right-turn vehicle in the green time, the function of the variable guide lane is changed to a straight right common lane.
2. The control method of a straight right variable guide lane considering pedestrian collision with a right-turn vehicle according to claim 1, wherein the geometric information of the intersection entrance lane acquired in the step (1) includes: number n of straight special guide lanessAnd a sidewalk width w; the acquired intersection timing information includes: straight green time g of target entrance lanesAnd a signal period T; the acquired traffic state information includes: straight and right-turn traffic flow q of target entrance lanesAnd q isrStreet pedestrian flow lambda of the approach lane adjacent to the target approach lane in the counterclockwise directionpThe queuing length after the period green light time on the straight and straight right guide lanes of the target entrance lane is finished:
Figure FDA0002687326410000014
and L'srThe queuing length of the target entrance lane and the straight and straight right guide lanes before the start of the green light time of the period is as follows:
Figure FDA0002687326410000021
and Lsr
3. The control method of a direct right variable guidance lane considering pedestrian and right-turn vehicle collision according to claim 1, wherein the saturated traffic capacity of the right-turn traffic in the green time is calculated in the step (3) according to the following formula:
Figure FDA0002687326410000022
wherein, betarThe right-turn vehicle in the straight right guide lane is occupied,
Figure FDA0002687326410000023
the time when the pedestrian crossing the street in the initial stage of the green light passes through the conflict area with the right turn traffic, alpha is the minimum gap which can be penetrated by the right turn traffic, alpha0Minimum headway, lambda, for right-turning vehicles to pass continuously through the intersectionpPedestrian crossing flow, g, for the inlet lane adjacent in the counter-clockwise directionrFor right turn, green time, g when going straight to the right common guide laner=gs(ii) a If the right turn traffic flow is more than NrAnd changing the straight right common guide lane into a right-turning special guide lane.
4. The control method of a straight right variable guidance lane considering a collision of a pedestrian with a right-turn vehicle according to claim 1, wherein when it is judged in said step (4) that the right-turn exclusive lane is changed to the straight right common guidance lane, according to a formula:
Figure FDA0002687326410000024
calculating the saturated traffic capacity of the right-turning vehicle in the green time, whereinrThe estimated values of (a) are:
Figure FDA0002687326410000025
Figure FDA0002687326410000026
the time when the pedestrian crossing the street in the initial stage of the green light passes through the conflict area with the right turn traffic, alpha is the minimum gap which can be penetrated by the right turn traffic, alpha0Minimum headway, lambda, for right-turning vehicles to pass continuously through the intersectionpPedestrian crossing flow, g, for the inlet lane adjacent in the counter-clockwise directionrIs the time of turning right and turning green, theta is the ratio of the right turning traffic flow to the straight traffic flow, nsThe number of the guide lanes dedicated for straight-going; if the right turn traffic flow is less than NrThen turn right special guide vehicleThe lane is changed to a straight right common guide lane.
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