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CN112017434B - A method and system for variable lane control based on space-time coordination - Google Patents

A method and system for variable lane control based on space-time coordination
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CN112017434B
CN112017434BCN202010836862.3ACN202010836862ACN112017434BCN 112017434 BCN112017434 BCN 112017434BCN 202010836862 ACN202010836862 ACN 202010836862ACN 112017434 BCN112017434 BCN 112017434B
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flow
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CN112017434A (en
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刘东波
何广进
刘成生
华璟怡
徐棱
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Traffic Management Research Institute of Ministry of Public Security
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Abstract

Translated fromChinese

本发明提供一种基于时空协同的可变车道控制方法,其能够预判路口流向流量,提前准备路口可变车道放行切换,进而可避免路口失衡或减少路口失衡时间,提升路口的总体通行效率。本发明技术方案中,将车辆数基于车辆类型转换为长度,基于待监测路段与各个上游车道的路径关系,结合历史车道状态数据进行计算,得到上游车道进入待监测路段的可变车道进口的车辆流量比,以及计算进入可变车道进口的车辆的转向的车辆流量比,预先估算待监测路段上每个行驶方向的车流量,相加后得到待监测路段上每个行驶方向的可能需要处理的车流量,然后与车道可以处理的车流量进行比较,进而找到转向方向;同时本发明也公开了一种基于时空协同的可变车道控制系统。

Figure 202010836862

The present invention provides a variable lane control method based on time-space coordination, which can predict the flow direction of the intersection and prepare for the release and switching of the variable lane at the intersection in advance, thereby avoiding the imbalance of the intersection or reducing the imbalance time of the intersection, and improving the overall traffic efficiency of the intersection. In the technical solution of the present invention, the number of vehicles is converted into length based on the type of vehicles, and based on the path relationship between the road section to be monitored and each upstream lane, and combined with historical lane state data to calculate, to obtain the vehicle from the upstream lane entering the variable lane entrance of the road section to be monitored. The flow ratio, and the vehicle flow ratio for calculating the steering of the vehicle entering the variable lane entrance, pre-estimating the traffic flow in each driving direction on the road section to be monitored, and adding them to obtain the traffic flow that may need to be processed in each driving direction on the road section to be monitored. The traffic flow is compared with the traffic flow that can be handled by the lane, and then the steering direction is found; at the same time, the invention also discloses a variable lane control system based on space-time coordination.

Figure 202010836862

Description

Variable lane control method and system based on space-time cooperation
Technical Field
The invention relates to the technical field of intelligent traffic control, in particular to a time-space cooperation based variable lane control method and system.
Background
In the rush hour of the urban traffic going on and off duty, the traffic flow in and out of the urban area presents an obvious tidal phenomenon. Under the conditions of high-intensity development of urban land and limited widened space of an intersection, lane changing is a common method for solving the traffic problem. Under the condition of not expanding road space resources, the variable lane control can adapt to the traffic pressure brought to the road intersection by the traffic flow with unbalanced directivity through the dynamic distribution of space-time resources of road sections and intersections.
The currently common variable lane control method is as follows:
(1) a fixed time period fixed steering method; policemen typically set a specific diversion to adapt to the overall traffic flow demand by experience, either early or late, daily;
(2) arranging detectors on two sides of the variable lane, monitoring traffic data such as flow direction flow and queuing state of the variable lane in real time, and dynamically switching lanes when unbalanced flow direction of different flow direction lanes is found, unbalanced flow direction is large, and queuing overstocking is blocked;
however, traffic flow in the same day has volatility, the demand for flow in a period of time is unstable, and different dates or social activities will also affect the stability of flow and the period starting time; therefore, the variable lane switching method based on (1) fixed time interval is easy to cause the problem of low lane passing efficiency in time interval; the dynamic switching method in (2) needs to switch on the premise that the intersection is unbalanced according to the intersection flow switching rule, so that safety delay is generated, and social vehicles after switching can not adapt to a new lane passing rule at once and can adapt to the new lane passing rule after several minutes, so that adaptation delay is generated, and unbalance congestion of several minutes is still caused.
Disclosure of Invention
In order to solve the problem that the existing variable lane control method causes low lane passing efficiency or the problem that a lane is jammed due to delay treatment, the invention provides a variable lane control method based on space-time coordination, which can prejudge the flow direction of an intersection and prepare the passing switching of variable lanes of the intersection in advance, thereby avoiding the unbalance of the intersection or reducing the unbalance time of the intersection and improving the overall passing efficiency of the intersection. Meanwhile, the invention also discloses a variable lane control system based on space-time cooperation.
The technical scheme of the invention is as follows: a variable lane control method based on space-time coordination is characterized by comprising the following steps:
s1: setting: the road section where the variable lane to be monitored is located is the road section to be monitored; the lanes in the same direction as the variable lanes to be monitored on the road section to be monitored share a lane entrance which is recorded as a variable lane entrance;
finding each lane on the road section where the upstream crossing in the inlet direction of the road section to be monitored is located, and recording the lane as an upstream lane;
setting I upstream lanes in the upstream intersection; wherein, the value of I is a positive integer;
acquiring traffic states of the variable lane to be monitored, all adjacent lanes and all upstream lanes, and acquiring lane state data;
s2: calculating the flow proportion of the vehicle of each upstream lane entering the inlet of the variable lane based on the current lane state data and reference historical data, and recording the flow proportion as a variable lane inlet steering proportion Q (I), wherein I represents the ith upstream lane, I is a positive integer, and I is not more than I;
s3: calculating the possible flow of the vehicles entering the inlet of the variable lane in different directions, and recording the flow as the predicted flow of the steering;
the flow rate of the flow turning into the inlet direction of the variable lane from the ith upstream lane is C (i);
after the vehicle enters the entrance of the variable lane, K possible driving directions are provided; all vehicles entering the entrance of the variable lane continue to turn to different direction proportions, which are recorded as entrance turning proportions P (K), wherein K is a positive integer and is less than or equal to K;
for the k-th steering, the current existing flow rates in all lanes of the road section to be monitored are TC (k) respectively;
aiming at the kth turning, in the current period, the maximum turning release flow of the intersection of the road section to be monitored is TM (k);
then: the calculation method of each predicted steering flow T (k) of the next wave at the inlet of the variable lane is as follows:
Figure BDA0002640023730000011
wherein k is a positive integer, and P (1) + P (2) +. + P (k) ═ 1;
s4: based on each predicted steering flow T (k) of the inlet of the variable lane to be monitored, calculating to obtain a pre-judgment result of whether the variable lane to be monitored on the road section to be monitored needs to be switched or not;
setting: each turning starting condition of the variable lane is that the minimum triggering lane flow is TS (K), the current turning lane number is N (K), the lane flow triggering difference value is DTS (K), the current turning of the variable lane to be monitored is m, m is a positive integer, and m is not more than K;
the steering determination parameter for determining whether to switch to the k-th steering is r (k):
Figure BDA0002640023730000021
if the value of R (k) is not zero, the pre-judgment result is as follows: performing variable lane switching to switch to a variable lane of the kth steering;
otherwise, the prejudgment result is as follows: for the k-th steered variable lane, no switching operation is performed.
It is further characterized in that:
in step S4, K is 1-3, and P (1) + P (2) + P (3) ═ 1; k is 1 for straight going, K is 2 for left turning and turning around, and K is 3 for right turning;
the types of the upstream lane include: mixed lane, turning-in lane, non-turning-in lane;
the lane that turns into is according to the turning to of the said upstream lane, must enter the lane of the entrance of the said variable lane; the variable lane inlet steering proportion Q (i) corresponding to the lane to be turned is 1;
the non-turning-in lane is a lane which turns according to the upstream lane and cannot enter the inlet of the variable lane necessarily; the variable lane inlet steering proportion q (i) corresponding to the non-turning lane is 0;
the mixed lane is a lane in which a part of vehicles can turn to the entrance of the variable lane according to the steering of the upstream lane; the inlet steering proportion of the variable lane corresponding to the mixing lane is more than or equal to 0 and less than or equal to Q (i) and less than or equal to 1;
the method for calculating the variable lane inlet steering proportion Q (i) of the mixed lane is obtained by calculation according to historical data of the upstream lane corresponding to the variable lane inlet steering proportion Q (i), and specifically comprises the following steps:
a 1: acquiring vehicle passing historical data of the mixed lane in a specified time period and a specified period, and recording the historical data as the mixed lane historical data;
a 2: calculating the proportion of right-turning and straight-going vehicles in the mixed lane historical data;
the proportion of the vehicles turning to the right and going straight is set as follows: right: straight;
a 3: calculating the variable lane inlet steering proportion Q (i) according to the relative positions of the mixing lane and the variable lane inlet:
if the right-turn vehicle in the mixed lane enters the variable lane entrance, the corresponding variable lane entrance steering proportion Q (i) is as follows:
Figure BDA0002640023730000022
if a straight vehicle in the mixed lane enters the variable lane entrance, the corresponding variable lane entrance steering proportion Q (i) is as follows:
Figure BDA0002640023730000031
the minimum triggering lane flow TS (k) and the lane flow triggering difference DTS (k) are constant data obtained by calculation according to historical data of the road section to be monitored, and are stored in the system in advance.
A variable lane control system based on spatiotemporal coordination, comprising: road surface traffic condition monitoring facilities, its characterized in that, it still includes:
the system comprises an intersection flow monitoring module, a road network flow direction ratio analysis module, a prejudgment module and a control module;
the intersection flow monitoring module is in communication connection with the road traffic state monitoring equipment, and collects the flow meter license plate information of all lanes and all upstream lanes of a road section to be monitored based on the road traffic state monitoring equipment to acquire lane state data; inputting the lane state data into the road network flow direction ratio analysis module and the prejudgment module;
the road network flow direction ratio analysis module determines the reference flow direction ratio of each variable lane to be monitored on the road section to be monitored in a corresponding time period according to historical characteristic data based on the lane state data collected by the intersection flow monitoring module, performs small step pitch adjustment on the flow direction ratio according to number information and OD (origin-destination) data of vehicles to be imported at an upstream intersection, calculates the flow proportion of the vehicles of each upstream lane entering the inlet of the variable lane, and obtains the inlet turning proportion Q (i) of the variable lane;
the pre-judging module integrates flow, flow incidence relation, flow direction ratio and current intersection lane state, and calculates each predicted turning flow T (k) of the next wave of the variable lane entrance based on the lane state data acquired by the intersection flow monitoring module, the variable lane entrance turning proportion Q (i) calculated by the intersection flow monitoring module and the intersection distance;
the control module calculates a steering judgment parameter R (k) based on the steering predicted flow T (k) calculated and obtained by the prejudgment module and by combining a preset control parameter minimum triggering lane flow TS (k) and a lane flow triggering difference value DTS (k);
obtaining a prejudgment result whether to switch to the kth steering according to the specific numerical value of R (k); and if the lane needs to be switched, issuing a switching instruction to a signal machine for execution according to the pre-judgment result, and switching the intersection variable lane indicating lamp.
It is further characterized in that:
the lane state data includes: the lane import reaches the lane import corresponds: steering, queuing length, vehicle number, road speed, current hour flow, lane congestion degree and vehicle data;
the vehicle data includes: number plate number of vehicle, length of vehicle.
The invention provides a variable lane control method based on space-time coordination, which is characterized in that the traffic volume is expressed by the traffic flow of a car PCU (Power control Unit), the number of vehicles is converted into the length based on the types of the vehicles, and the length is used as the basis for calculating the lane throughput; calculating based on the road section to be monitored and the path relation of each upstream lane in an upstream intersection of the road section to be monitored by combining historical lane state data to obtain the vehicle flow ratio of the upstream lane entering a variable lane inlet of the road section to be monitored and the vehicle flow ratio of the steering of the vehicle entering the variable lane inlet, estimating the vehicle flow in each driving direction on the road section to be monitored in advance, adding to obtain the vehicle flow which is possibly required to be processed in each driving direction on the road section to be monitored, comparing with the vehicle flow which can be processed by the lane, and finding the steering direction which cannot be completely processed, namely the switching direction of the variable lane to be monitored; the switching scheme of the variable lane to be monitored is obtained by pre-calculating before the road is unbalanced, so that the steering direction of the road section to be detected can be switched more timely, and the probability of the road unbalance problem is effectively reduced; calculating based on the upstream lane state data, the historical lane state data and the current lane state data to obtain accurate prejudgment data, ensuring that the switching scheme is adapted to the tide phenomenon of the variable lane to be monitored, and improving the accuracy of effective implementation of the scheme; meanwhile, the technical scheme of the invention is a prejudgment scheme, and the variable lane switching is carried out before the intersection is unbalanced, so that the possibility of traffic unbalance at the intersection is greatly reduced, and the overall traffic efficiency of the intersection is effectively improved.
Drawings
Fig. 1 is a block configuration diagram of a variable lane control system of the present invention;
fig. 2 is a schematic structural diagram of a road section to be monitored in the embodiment.
Detailed Description
As shown in fig. 1 and 2, the present invention relates to a variable lane control system based on spatiotemporal coordination, which comprises: the road traffic condition monitoring device comprises road traffic condition monitoring equipment, an intersection flow monitoring module, a road network flow-to-flow ratio analysis module, a prejudgment module and a control module; wherein, road surface traffic condition monitoring facilities is current road monitoring equipment, and this patent technical scheme need not to add new equipment and can implement, very big control the implementation cost of scheme.
The intersection flow monitoring module is in communication connection with road traffic state monitoring equipment, and based on the road traffic state monitoring equipment, the intersection flow monitoring module collects the flow and license plate information of all lanes and all upstream lanes of theroad section 1 to be monitored, and acquires lane state data; the lane state data are input and transmitted into a road network flow direction ratio analysis module and a prejudgment module; the lane state data includes: the lane import, and the lane import corresponds: steering, queuing length, vehicle number, road speed, current hour flow, lane congestion degree and vehicle data; the vehicle data includes: number plate number of vehicle, length of vehicle; in this embodiment, the intersection traffic monitoring module is in communication connection with the road traffic state monitoring devices associated with theroad section 1 to be monitored and theupstream intersection 4, and monitors the relevant lane state data.
The road network flow direction ratio analysis module determines each steering flow direction ratio of thevariable lane inlet 3 in theroad section 1 to be monitored in a corresponding time period according to historical characteristic data based on lane state data acquired by the intersection flow monitoring module, performs flow direction ratio small step pitch adjustment according to number information of vehicles to be imported at theupstream intersection 4 and OD (ORIGIN degree) data on the basis, calculates the flow ratio of the vehicles of each upstream lane entering thevariable lane inlet 3, and obtains the steering ratio Q (i) of thevariable lane inlet 3.
The pre-judging module integrates the flow, the flow direction incidence relation, the flow direction ratio and the current intersection lane state, calculates the predicted flow T (k) of each turn of the next wave of thevariable lane inlet 3 based on the lane state data acquired by the intersection flow monitoring module, the turning proportion Q (i) of thevariable lane inlet 3 calculated by the intersection flow monitoring module and the intersection distance.
The control module calculates a steering judgment parameter R (k) based on a steering predicted flow T (k) calculated and obtained by the prejudgment module and by combining a preset control parameter minimum triggering lane flow TS (k) and a lane flow triggering difference value DTS (k); obtaining a prejudgment result whether to switch to the kth steering according to the specific numerical value of R (k); and if the lanes need to be switched, issuing a switching instruction to the signal machine according to the pre-judgment result to complete the switching of the intersection variable lane indicating lamp.
A variable lane control method based on space-time coordination comprises the following steps.
Fig. 2 shows an embodiment of the present invention. S1: setting: the road section where thevariable lane 2 to be monitored is located is theroad section 1 to be monitored;
in this embodiment, there are 3 adjacent lanes on theroad section 1 to be monitored in the same direction as thevariable lane 2 to be monitored:lane 1,lane 3,lane 4; thevariable lane 2 to be monitored and the adjacent lane share a lane entrance which is recorded as avariable lane entrance 3;
finding each lane on the road section where theupstream intersection 4 in the inlet direction of theroad section 1 to be monitored is located, and recording the lane as an upstream lane;
it is assumed that there are I upstream lanes in theupstream intersection 4; wherein, the value of I is a positive integer;
in this embodiment, I is 18, and there are 18 lanes at the upstream intersection 2:upstream lane 5 to upstream lane 22;
acquiring avariable lane 2 to be monitored and all adjacent lanes: the lane state data is acquired based on the traffic states of thelane 1, thelane 3, thelane 4, and all the upstream lanes (theupstream lane 5 to the upstream lane 22).
S2: calculating the flow proportion of the vehicle entering theinlet 3 of the variable lane of each upstream lane based on the current lane state data and the reference historical data, and recording the flow proportion as the inlet steering proportion Q (I) of the variable lane, wherein I is a positive integer and is not more than I;
the types of upstream lanes include: mixed lane, turning-in lane, non-turning-in lane;
the lane turning-in is a lane which inevitably enters thevariable lane inlet 3 according to the steering of the upstream lane; the variable lane entrance steering proportion Q (i) corresponding to the lane is 1; in this embodiment, if the vehicles in the upstream lanes 11, 12, 17, 18 inevitably enter thevariable lane entrance 3, the corresponding variable lane entrance steering ratio q (i) is 1;
the non-turning lane is a lane which turns according to an upstream lane and cannot enter thevariable lane inlet 3 necessarily; the variable lane entrance steering proportion Q (i) corresponding to the non-turning lane is 0; in this embodiment, if the vehicles in theupstream lanes 4, 6 to 9, 13, 14 to 16 inevitably do not enter thevariable lane entrance 3, the corresponding variable lane entrance steering ratio q (i) is 0;
the mixed lane is a lane which turns according to an upstream lane, and a part of vehicles can turn into thevariable lane inlet 3; the turning proportion of thevariable lane inlet 3 corresponding to the mixed lane is more than or equal to 0 and less than or equal to Q (i) and less than or equal to 1; in the present embodiment, the upstream lane 5 (lane marked with 5 in fig. 2) and the upstream lane 10 (lane marked with 6 in fig. 2) are mixed lanes, and some vehicles will turn into thevariable lane inlet 3; the calculation method of the variable lane inlet steering proportion Q (i) is obtained by calculation according to the historical data of the corresponding upstream lane;
in this embodiment, according to the history data, the following results are obtained:
the ratio of right-turn to straight movement of the vehicle passing through theupstream lane 5 is: 3:2, after the vehicle in theupstream lane 5 turns right, the vehicle enters the entrance of the variable lane, and then: the variable lane entrance steering ratio q (i) of theupstream lane 5 is 3/(2+3) 0.6;
the ratio of right-turn to straight movement of the vehicle passing through the upstream lane 10 is: 4:1 the vehicles in theupstream lane 5 go straight and then enter the entrance of the variable lane,
then: the variable lane entrance steering ratio q (i) of the upstream lane 10 is 4/(4+1) 0.8.
S3: calculating the flow of the vehicles entering thevariable lane inlet 3 in different possible driving directions, and recording the flow as the predicted steering flow;
k possible driving directions after the vehicle enters thevariable lane entrance 3;
in the embodiment, 4 lanes and 3 possible driving directions coexist on theroad section 1 to be monitored; the flow rate of the direction from the ith upstream lane to theinlet 3 of the variable lane is C (i), and the flow rate is obtained by actual measurement through the road traffic state monitoring equipment;
in the embodiment, the flow rates C (i) of the upstream lanes 5-22 are all as follows: 20; i takes values from 1 to 18, and c (i) q (i) takes values of:
0,0,0,0,20×0.6,0,0,0,0,20×0.4,20,20,0,0,0,0,20,20;
the proportion of all vehicles entering thevariable lane inlet 3 continuously turning to different directions is recorded as inlet turning proportion P (k), and P (k) is obtained by calculation based on historical data of thevariable lane inlet 3; such as: acquiring historical data of allentrances 3 entering the variable lane in the same time period and the same period, and counting different turning proportions of the historical data to obtain an entrance turning proportion P (k);
wherein k is a positive integer, and P (1) + P (2) +. + P (k) ═ 1;
in the embodiment, the k value is 1-3, and P (1) + P (2) + P (3) ═ 1; p (1) represents the proportion of straight vehicles, P (2) represents the proportion of left-turning and turning vehicles, and P (3) represents the proportion of right-turning vehicles;
obtaining after calculation: p (straight line) ═ 0.5, P (right turn) ═ 0.2, P (left turn) ═ 0.3;
in this embodiment, the right-turn steering can be always operated, so that the problem of retention does not occur in a normal state, and in this embodiment, calculation is performed only for the two steering directions of straight traveling and left turning;
the current existing flow rates of all lanes of thevariable lane 2 to be monitored are TC (k) respectively, and are obtained through actual measurement of road traffic state monitoring equipment;
in this embodiment, in 4 lanes on thevariable lane 2 to be monitored, there are traffic flows as follows:
TC(1)=15,TC(2)=15,TC(3)=30,TC(4)=20;
in the current period, the maximum turning release flow of the intersection of theroad section 1 to be monitored is TM (k), and the maximum release flow is TM (k) obtained by calculation based on the historical data of each lane in theroad section 1 to be monitored in the same period;
in this embodiment, the maximum traffic volume of each lane in theroad section 1 to be monitored in each period is as follows: 25;
the straight lane flow trigger difference DTS (straight) is 10; the minimum trigger lane flow (start trigger lane flow) TS (straight line) is 15;
then: the calculation method of each predicted turning flow T (k) of the next wave of thevariable lane inlet 3 is as follows:
Figure BDA0002640023730000051
Figure BDA0002640023730000052
then, the inlet inflow rate of the next wave variable lane is as follows:
aiming at the straight direction: t (straight line) 100 × 0.5+ (30-25) 55;
for the left turn direction: t (left turn) ═ 100 × 0.3 ═ 30.
S4: based on the predicted turning flow T (k) of each inlet of thevariable lane 2 to be monitored, calculating to obtain a pre-judgment result of whether thevariable lane 2 to be monitored on theroad section 1 to be monitored needs to be switched;
setting: each turning starting condition of the variable lane is that the minimum triggering lane flow is TS (k), the current turning lane number is N (k), the lane flow triggering difference value is DTS (k), and the current turning is m;
wherein, the minimum trigger lane flow ts (k) represents: when the queued traffic reaches TS (k), judging that the steering k is congested; the lane flow trigger difference dts (k) represents: a threshold value of the length difference between the steering k to be calculated and the average queued vehicle in the current release direction m; TS (k) and DTS (k) are constant data obtained after calculation according to historical data of theroad section 1 to be monitored and are stored in the system in advance;
the minimum trigger lane flow ts (k) is set so as to ensure that the lane change is not required to be switched even if the flow rate is not uniform, without causing congestion; such as: the number of left-turn lanes is more than 10, the number of straight lanes is 0, and at the moment, the intersection is not blocked, although the number of left-turn lanes has a larger difference value than that of straight lanes, switching is not needed, and both lanes can be emptied in a normal period; such as: usually, the quantity of the vehicles queued at the intersection within 50 meters (about 8 vehicles) can empty the vehicles on the lane, and the value is also related to the intersection phase time and needs to be set according to specific historical data of a road section to be detected;
the lane flow trigger difference DTS (k) determines the switching sensitivity, and the smaller the value is, the easier the switching is; common city road sections, which are usually set to be 5 (the difference between the queuing times is about 20 meters); setting specific numerical values according to specific historical data of the road section to be detected;
the steering determination parameter for determining whether to switch to the k-th steering is r (k):
Figure BDA0002640023730000061
the judgment parameter r (k) indicates that the average queuing length of the steering k to be calculated exceeds ts (k), and meanwhile, the length difference between the steering k to be calculated and the average queuing vehicle in the current release direction m exceeds dts (k), and the value of r (k) is not zero, that is, the pre-judgment result is: performing variable lane switching to switch to the mth steering variable lane;
otherwise, the prejudgment result is as follows: for the k-th steering variable lane, no switching operation is carried out;
in this embodiment, r (k) corresponding to the straight direction is calculated:
r (straight line) ((55/1) -15) ((55/1) - (30/1) -15) ═ 40 × 10
If R (straight running) is not zero, the lane change direction of thevariable lane 2 to be detected needs to be changed into straight running in advance.
In the technical scheme of the invention, firstly, the traffic flow of the intersection on the road section to be detected is measured actually, and then the traffic flow which is possibly turned to the entrance of the variable lane with the monitored road section is calculated according to historical data
Figure BDA0002640023730000062
Traffic flow based on entry into variable lane entry
Figure BDA0002640023730000063
And the current existing traffic flow TC (k) and the maximum release flow TM (k) are estimated, and the estimated traffic flow T (k) to be faced by each steering is estimated; based on the estimated traffic flow T (k), the minimum triggered lane flow TS (k) and the lane flow triggering difference DTS (k), comparing the current releasing direction m with the steering k to be calculated, and judging whether the steering of the variable lane to be detected needs to be adjusted according to the judgment parameter R (k).
In the whole calculation process of the technical scheme of the invention, the traffic flow is represented by the traffic flow of a unit equivalent of a car PCU (Passenger car unit), and the number of vehicles is converted into the length based on the type of the vehicles and is used as the basis for calculating the lane throughput; the equivalent car conversion method comprises the following steps: a4-5 passenger car is used as a standard car and is used as an equivalent car type for converting road traffic volume of various types of vehicles, and specific reference is made as follows: [ GB 14886 + 2006, definition 3.1 ].
According to the technical scheme, the historical data in the same period and the same time period and the currently collected real-time data are used as the basis for calculating to obtain an objective result and serve as the basis of the lane-variable switching scheme, the data are objective and accurate, and the tide state on the road section to be monitored is met; meanwhile, the variable lane control system acquires data in real time based on the road traffic state monitoring equipment, detects the state of a road section to be detected in real time, completes the change of the lane-changing indicator lamp of the intersection in advance before a problem occurs according to the real-time state, and switches the lane-changing indicator lamp to be detected; the method prevents the intersection from being blocked, is more timely compared with the conventional variable lane control, and improves the crossing traffic efficiency.

Claims (6)

Translated fromChinese
1.一种基于时空协同的可变车道控制方法,其特征在于,其包括以下步骤:1. a variable lane control method based on space-time coordination, is characterized in that, it comprises the following steps:S1:设:待监测可变车道所在路段为待监测路段;所述待监测路段上与所述待监测可变车道同向的车道共同拥有一个车道入口,记做可变车道进口;S1: Assume: the road section where the variable lane to be monitored is located is the road section to be monitored; the road section to be monitored and the lane with the same direction as the variable lane to be monitored share a lane entrance, which is recorded as the variable lane entrance;找到所述待监测路段进口方向的上游路口所在路段上的各个车道,记做上游车道;Find each lane on the road section where the upstream intersection in the entrance direction of the road section to be monitored is located, and record it as the upstream lane;设,所述上游路口中,共有I个所述上游车道;其中,I取值为正整数;Suppose, in the upstream intersection, there is a total of 1 upstream lanes; wherein, 1 is a positive integer;获取所述待监测可变车道、所有的所述相邻车道、所有的所述上游车道的交通状态,获取车道状态数据;Acquire the traffic status of the variable lane to be monitored, all the adjacent lanes, and all the upstream lanes, and acquire lane status data;S2:基于当前的所述车道状态数据、参照历史数据,计算每一个所述上游车道的车辆进入所述可变车道进口的流量比例,记做可变车道进口转向比例Q(i),其中i表示第i个上游车道,i为正整数,且i≤I;S2: Based on the current lane state data and with reference to historical data, calculate the flow ratio of vehicles in each of the upstream lanes entering the variable lane entrance, and record it as the variable lane entrance steering ratio Q(i), where i Indicates the i-th upstream lane, i is a positive integer, and i≤I;S3:计算进入到所述可变车道进口的车辆的可能的驶入不同方向的流量,记做转向预计流量;S3: Calculate the possible flow of the vehicle entering the variable lane entrance into different directions, and record it as the expected steering flow;自第i个所述上游车道转入所述可变车道进口方向的流量为C(i);The flow from the ith upstream lane into the variable lane entrance direction is C(i);车辆进入到所述可变车道进口后,共有K个可能的行驶方向;进入所述可变车道进口的所有车辆继续转向不同的方向的比例,记做进口转向比例P(k),k为正整数,且k≤K;After the vehicle enters the variable lane entrance, there are a total of K possible driving directions; the proportion of all vehicles entering the variable lane entrance that continue to turn in different directions is recorded as the entrance steering ratio P(k), where k is positive Integer, and k≤K;针对第k个转向,所述待监测路段的所有车道中当前已存在流量分别为TC(k);For the kth turn, the current existing traffic in all lanes of the road section to be monitored is TC(k) respectively;针对第k个转向,当前周期下,所述待监测路段的路口的当前转向最大放行流量为TM(k);For the k-th turn, in the current cycle, the current turning maximum release flow at the intersection of the road section to be monitored is TM(k);则:所述可变车道进口下一波的各个转向预计流量T(k)计算方法如下:Then: the calculation method of the estimated flow T(k) of each turn in the next wave of the variable lane entrance is as follows:
Figure FDA0003205680050000011
Figure FDA0003205680050000011
其中,k取值为正整数,且P(1)+P(2)+...+P(k)=1;Among them, k is a positive integer, and P(1)+P(2)+...+P(k)=1;S4:基于所述待监测可变车道的进口的各个所述转向预计流量T(k),计算后获得所述待监测路段上的所述待监测可变车道是否需要切换的预判结果;S4: Based on each of the estimated steering flows T(k) at the entrance of the variable lane to be monitored, obtain after calculation a pre-judgment result of whether the variable lane to be monitored needs to be switched on the road section to be monitored;设:可变车道各个转向出发条件为最小触发车道流量为TS(k),当前转向车道数为N(k),车道流量触发差值为DTS(k),所述待监测可变车道当前转向为m,m为正整数,且m≤K;Suppose: the starting conditions for each turn of the variable lane are that the minimum trigger lane flow is TS(k), the current number of steering lanes is N(k), the lane flow trigger difference is DTS(k), the current steering of the variable lane to be monitored is is m, m is a positive integer, and m≤K;是否切换为第k个转向的转向判断参数为R(k):The steering judgment parameter for whether to switch to the k-th steering is R(k):
Figure FDA0003205680050000012
Figure FDA0003205680050000012
如果R(k)的值不为零,则所述预判结果为:进行可变车道切换,切换为第k个转向的可变车道;If the value of R(k) is not zero, the pre-judgment result is: perform variable lane switching, and switch to the k-th steering variable lane;否则,所述预判结果为:针对第k个转向的可变车道,不实施切换操作。Otherwise, the pre-judgment result is: for the variable lane of the k-th turn, no switching operation is performed.2.根据权利要求1所述一种基于时空协同的可变车道控制方法,其特征在于:步骤S4中,K取值为1~3,P(1)+P(2)+P(3)=1;K=1代表直行,K=2代表左转加掉头,K=3代表右转。2 . The variable lane control method based on time-space coordination according to claim 1 , wherein in step S4 , the value of K is 1 to 3, and P(1)+P(2)+P(3) . 3 . =1; K=1 means going straight, K=2 means turning left and turning around, and K=3 means turning right.3.根据权利要求1所述一种基于时空协同的可变车道控制方法,其特征在于:所述上游车道的类型包括:混合车道、转入车道、非转入车道;3 . The variable lane control method based on time-space coordination according to claim 1 , wherein the types of the upstream lanes include: mixed lanes, turn-in lanes, and non-turn-in lanes; 3 .所述转入车道为根据所述上游车道的转向,必然进入所述可变车道进口的车道;所述转入车道对应的所述可变车道进口转向比例Q(i)=1;The turning-in lane is a lane that must enter the variable-lane entrance according to the steering of the upstream lane; the variable-lane-entry steering ratio Q(i)=1 corresponding to the turning-in lane;所述非转入车道为根据所述上游车道转向,必然不会进入所述可变车道进口的车道;所述非转入车道对应的所述可变车道进口转向比例Q(i)=0;The non-turn-in lane is a lane that is steered according to the upstream lane and will definitely not enter the variable lane entrance; the variable lane entrance steering ratio Q(i)=0 corresponding to the non-turn-in lane;所述混合车道为根据所述上游车道转向,存在一部分车辆会转入所述可变车道进口的车道;所述混合车道对应的所述可变车道进口转向比例0≤Q(i)≤1。The mixed lane is a lane that turns according to the upstream lane, and some vehicles will turn into the variable lane entrance; the variable lane entrance steering ratio corresponding to the mixed lane is 0≤Q(i)≤1.4.根据权利要求1所述一种基于时空协同的可变车道控制方法,其特征在于:所述混合车道的所述可变车道进口转向比例Q(i)的计算方法是根据其对应的所述上游车道的历史数据进行计算获得,具体方法包括以下步骤:4 . The variable lane control method based on time-space coordination according to claim 1 , wherein: the calculation method of the variable lane entrance steering ratio Q(i) of the mixed lane is based on the corresponding The historical data of the upstream lane is calculated and obtained, and the specific method includes the following steps:a1:获取指定时间段、指定周期内的所述混合车道的过车历史数据,记做混合车道历史数据;a1: Obtain the passing historical data of the mixed lane in the specified time period and the specified period, and record it as the mixed lane historical data;a2:计算所述混合车道历史数据中向右转和直行车辆的比例;a2: Calculate the proportion of vehicles turning right and going straight in the mixed lane historical data;设向右转和直行车辆的比例为:Right:Straight;Let the ratio of vehicles turning right and going straight be: Right: Straight;a3:根据所述混合车道与所述可变车道进口的相对位置计算所述可变车道进口转向比例Q(i):a3: Calculate the variable lane entrance steering ratio Q(i) according to the relative position of the hybrid lane and the variable lane entrance:如果所述混合车道中右转车辆进入到所述可变车道进口,则其对应的所述可变车道进口转向比例Q(i)为:
Figure FDA0003205680050000021
If a right-turning vehicle in the mixed lane enters the variable lane entrance, its corresponding variable lane entrance steering ratio Q(i) is:
Figure FDA0003205680050000021
如果所述混合车道中直行车辆进入到所述可变车道进口,则其对应的所述可变车道进口转向比例Q(i)为:
Figure FDA0003205680050000022
If a straight vehicle in the mixed lane enters the variable lane entrance, its corresponding variable lane entrance steering ratio Q(i) is:
Figure FDA0003205680050000022
5.根据权利要求1所述一种基于时空协同的可变车道控制方法,其特征在于:所述最小触发车道流量TS(k)、所述车道流量触发差值DTS(k)为根据所述待监测路段的历史数据进行计算后得到的常量数据,预先存储在系统中。5 . The variable lane control method based on time-space coordination according to claim 1 , wherein the minimum trigger lane flow TS(k) and the lane flow trigger difference DTS(k) are based on the The constant data obtained by calculating the historical data of the road section to be monitored is pre-stored in the system.6.根据权利要求1所述一种基于时空协同的可变车道控制方法,其特征在于:所述车道状态数据包括:车道进口,及所述车道进口对应的:转向、排队长度、车辆数、路段车速、当前小时流量、车道拥堵程度、车辆数据;6 . The variable lane control method based on time-space coordination according to claim 1 , wherein the lane state data comprises: a lane entrance, and corresponding to the lane entrance: steering, queue length, number of vehicles, Road speed, current hourly traffic, lane congestion, vehicle data;所述车辆数据包括:车辆号牌号码、车辆长度。The vehicle data includes: vehicle license plate number and vehicle length.
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