CN110223502A - A kind of method and device of crossing inlet track data canalization - Google Patents
A kind of method and device of crossing inlet track data canalization Download PDFInfo
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Abstract
The invention discloses a kind of method and devices of crossing inlet track data canalization, this method includes the section vehicle number within a preset time interval for obtaining each lane in crossing inlet road, section is averaged vehicle commander and maximum queue length, determine the pressure share rate in each lane, according to the pressure share rate in each lane, the standard deviation and share rate imbalance threshold of the pressure share rate in crossing inlet road, determine the first crossing inlet road, according to the pressure share rate in each lane in the first crossing inlet road, determine the pressure share rate of the first each direction of traffic in crossing inlet road, canalization amendment is carried out to the first crossing inlet road according to the pressure share rate in each lane in the first crossing inlet road and the pressure share rate of each direction of traffic.By the pressure share rate based on each lane of entrance driveway, the unbalance judgement system of lane pressure share rate is established, whether unbalance the crossing inlet road lane Zhong Ge is lined up under different time scales to identify, accordingly existing unreasonable canalization entrance driveway.
Description
Technical Field
The embodiment of the invention relates to the technical field of traffic, in particular to a method and a device for channelizing data of an intersection entrance lane.
Background
Intersections are important components of urban road networks and are located at key positions in urban traffic, and entrance lane canalization is particularly needed as a key link of intersection traffic organization and canalization. Unreasonable entrance canalization can cause the traffic demand in a specific direction to be not met, and can also cause the insufficient utilization rate of lanes and the failure of efficient operation of intersections. The unreasonable intersection of the approach becomes the bottleneck of the urban road, which brings the problems of queuing vehicles at the intersection, delay of driving and the like, and even leads to the more serious traffic problems of spreading of traffic jam, regional traffic jam, reduction of traffic capacity and the like. In the existing urban road construction, the canalization design of the intersection entrance road mainly depends on professionals, and the canalization design is carried out by combining self experience with intersection design specifications such as urban road design specification on the basis of certain traffic investigation. Due to subjective reasons such as poor professional performance of designers, insufficient time of traffic investigation and the like, an intersection with unreasonable channelized design of a part of entrance channels objectively exists in the existing urban road network. Meanwhile, with the advance of urban construction, new trip generation and attraction points cause changes of traffic trip demands, and the changes can cause canalization of the original intersection entrance road to be unreasonable. How to identify unreasonable canalized intersections of an entrance road in an urban road network and provide a scientific theoretical method for canalization design becomes an urgent need in the industry.
Disclosure of Invention
The embodiment of the invention provides a method and a device for channelizing intersection inlet channel data, which are used for identifying an unreasonable channelized intersection of an inlet channel in an urban road network and carrying out channelized correction.
The intersection entrance lane data canalization method provided by the embodiment of the invention comprises the following steps:
acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of an intersection entrance lane within a preset time interval;
determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average vehicle length of the section;
determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold; the first intersection entrance lane is an intersection entrance lane with a canalization problem;
determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
and performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
Optionally, the acquiring the number of cross-section vehicles, the cross-section average length of the vehicles and the maximum queuing length of each lane of the intersection entrance lane within a preset time interval includes:
and acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval through a multi-target radar.
Optionally, the determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average length of the section includes:
determining the maximum number of queued vehicles in each preset time interval according to the maximum queuing length and the average section length;
and determining the pressure sharing rate of each lane according to the maximum number of the queued vehicles and the number of the cross-section vehicles.
Optionally, the allocation rate imbalance threshold comprises allocation rate imbalance thresholds for a plurality of time periods;
determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and the sharing rate imbalance threshold value, including:
determining lane unbalance indexes of the lanes according to the pressure sharing rate of the lanes and the standard deviation of the pressure sharing rate of the intersection entrance lane;
determining the number of imbalances occurring in each time period according to the lane imbalance index of each lane;
and determining the intersection entrance lane with the unbalance quantity in each time period larger than the sharing rate unbalance threshold value corresponding to each time period as a first intersection entrance lane.
Optionally, the channelizing correction on the first intersection approach according to the pressure sharing rate of each lane of the first intersection approach and the pressure sharing rate of each driving direction includes:
determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
determining the number of lanes to be allocated in each driving direction according to the pressure sharing rate of each driving direction and the target value of the pressure sharing rate of the first intersection entrance lane;
and reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in each driving direction and the actual number of the lanes in each vehicle direction.
Correspondingly, an embodiment of the present invention provides an intersection entrance data canalization apparatus, including:
the acquisition unit is used for acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance lane within a preset time interval;
the processing unit is used for determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average vehicle length of the section; determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold; the first intersection entrance lane is an intersection entrance lane with a canalization problem; determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane; and performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
Optionally, the processing unit is specifically configured to:
and acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval through a multi-target radar.
Optionally, the processing unit is specifically configured to:
determining the maximum number of queued vehicles in each preset time interval according to the maximum queuing length and the average section length;
and determining the pressure sharing rate of each lane according to the maximum number of the queued vehicles and the number of the cross-section vehicles.
Optionally, the allocation rate imbalance threshold comprises allocation rate imbalance thresholds for a plurality of time periods;
the processing unit is specifically configured to:
determining lane unbalance indexes of the lanes according to the pressure sharing rate of the lanes and the standard deviation of the pressure sharing rate of the intersection entrance lane;
determining the number of imbalances occurring in each time period according to the lane imbalance index of each lane;
and determining the intersection entrance lane with the unbalance quantity in each time period larger than the sharing rate unbalance threshold value corresponding to each time period as a first intersection entrance lane.
Optionally, the processing unit is specifically configured to:
determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
determining the number of lanes to be allocated in each driving direction according to the pressure sharing rate of each driving direction and the target value of the pressure sharing rate of the first intersection entrance lane;
and reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in each driving direction and the actual number of the lanes in each vehicle direction.
Correspondingly, an embodiment of the present invention further provides a computing device, including:
a memory for storing program instructions;
and the processor is used for calling the program instruction stored in the memory and executing the intersection approach data channelizing method according to the obtained program.
Accordingly, embodiments of the present invention also provide a computer-readable non-volatile storage medium, which includes computer-readable instructions, and when the computer-readable instructions are read and executed by a computer, the computer is caused to execute the method for channeling intersection approach data.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a method for channelizing intersection approach data according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an intersection approach multi-target radar provided by an embodiment of the invention;
FIG. 4 is a schematic flow chart illustrating a method for trenching correction according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for channeling intersection entrance lane data according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 illustrates an exemplary system architecture, which may be a server 100, including a processor 110, a communication interface 120, and a memory 130, to which embodiments of the present invention are applicable. The server 100 may be a server located in a traffic control center, or may be a server in other sub-centers, which is not limited in this embodiment of the present invention.
The communication interface 120 is used for communicating with a terminal device, and transceiving information transmitted by the terminal device to implement communication.
The processor 110 is a control center of the server 100, connects various parts of the entire server 100 using various interfaces and routes, performs various functions of the server 100 and processes data by operating or executing software programs and/or modules stored in the memory 130 and calling data stored in the memory 130. Alternatively, processor 110 may include one or more processing units.
The memory 130 may be used to store software programs and modules, and the processor 110 executes various functional applications and data processing by operating the software programs and modules stored in the memory 130. The memory 130 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to a business process, and the like. Further, the memory 130 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
It should be noted that the structure shown in fig. 1 is only an example, and the embodiment of the present invention is not limited thereto.
Based on the above description, fig. 2 exemplarily illustrates a flow of a method for channeling intersection data of an intersection, which may be performed by an apparatus for channeling intersection data, which may be located in the server 100 shown in fig. 1, or may be the server 100 according to an embodiment of the present invention.
As shown in fig. 2, the process specifically includes:
step 201, acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval.
The number of cross-section vehicles, the average length of the cross-section vehicles and the maximum queuing length of each lane of the intersection approach in the preset time interval are obtained through a multi-target radar. The multi-target radar detector is arranged on a signal lamp post of an intersection exit lane and is used for detecting traffic flow parameters of a reverse entrance lane. The multi-target radar can detect two types of traffic flow data, one type is section traffic flow data, including flow, average speed, headway and the like; and the other is regional traffic flow data which comprises queue length, parking times, delay time and the like. The multi-target radar detector has a corresponding detection section for detecting sectional traffic flow data, typically a section 30 meters from the stop line, and a detection area for detecting regional traffic flow data, typically an area 200 meters upstream from the stop line, as shown in fig. 3. The multi-target radar detection can distinguish traffic flow information of lane levels, and lanes are numbered sequentially from a road center line to two sides of the road.
The performance of the multi-target radar detector is different, the positions of the detection cross sections have a plurality of values of 30 meters, 50 meters and the like, and the range of the detection area is different from 50 meters to 200 meters. The embodiment of the invention provides an entrance road canalization problem identification method based on lane-level traffic flow and vehicle queuing data. The detection section is arranged at the beginning of a solid line of the guide lane and is 30 meters away from the stop line, and therefore the traffic flow of the actual lane passing through the intersection can be accurately counted by the arrangement of the detection section. The detection area is positioned at a distance of 200 meters from the stop line so as to measure the queuing length of the lane to the maximum extent. The embodiment of the invention requires that the multi-target radar detector can cover all lanes of an entrance lane, and if the number of lanes of the entrance lane at a specific intersection is n, the lanes are numbered as 1,2,3, and n in sequence from the center line of the road to the right side (along the direction of the vehicle).
The reasons for influencing the crossing traffic efficiency mainly include two kinds: one is unreasonable signal timing and the other is unreasonable channeling of the inlet channels. The invention identifies the channelized entrance lane of the problem on the premise that the signal timing of the intersection is optimized, and the main factor influencing the traffic efficiency of the intersection is unreasonable channelized entrance lane of the intersection.
In order to identify the channeling of the problematic intersection, the embodiment of the invention is defined as follows:
taking a single intersection entrance lane as a minimum detection space unit;
taking 5 minutes as a traffic flow parameter statistic minimum time unit, dividing 24 hours a day into 288 time intervals ti (time interval) which arejThe jth time interval, j 1,2,3, 288;
Laneithe number of lanes is 1,2,3, 1, n, which is the ith lane numbered from the center line of the road to both sides of the road.
The number of cross-section vehicles detected by the radar in the ith lane in the jth time interval is shown.
The average section length (average length) of the radar detection lane in the ith lane in the jth time interval.
Is the maximum queue length (maximum queue length) detected by the radar in the ith lane in the jth time interval.
And 202, determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average vehicle length of the section.
When the pressure sharing rate of each lane is determined, the maximum number of queued vehicles in each preset time interval is determined mainly according to the maximum queuing length and the average section vehicle length, and then the pressure sharing rate of each lane is determined according to the maximum number of queued vehicles and the number of section vehicles.
The lanes do not provide sufficient capacity to allow the vehicle to stop ahead of the stop line, subject to queuing pressure. Under ideal conditions, the queuing pressure in each direction and each lane is equal. If the number of lanes allocated to a certain driving direction is too small, and the traffic demand cannot be met, the queuing pressure of the lanes in the driving direction is too large, and frequent and serious vehicle parking queuing is caused.
The maximum number of queued vehicles per time interval isRepresenting the pressure borne by the ith lane, and calculating the formula (1) as follows:
accordingly, the pressure sharing rate (share ratio) of each lane in each time interval can be obtainedThe vehicle queuing degree of the ith lane is measured, and the calculation formula (2) is as follows:
wherein,representing the overall traffic demand of the ith lane in the jth time interval. The larger the pressure sharing rate of the lane, the more vehicles are queued in the lane, that is, enough lanes are not allocated to the direction to which the lane belongs, resulting in the higher queuing pressure.
And 203, determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold value.
In this embodiment of the present invention, the first intersection approach is an intersection approach with a canalization problem, where the allocation rate imbalance threshold may include allocation rate imbalance thresholds of multiple time periods, and the time period may be set according to experience, for example, the time period may be 1 day, 1 month, 1 quarter, 1 year, and the like, which is not limited in this embodiment of the present invention.
For example, under reasonable inlet-lane channeling conditions, the pressure sharing rate for each lane is equal, i.e.The unreasonable lane canalization leads to that the traffic demand of a specific lane cannot be met, leads to that more vehicles are queued in the specific lane, and leads to that the lane sharing rate is unbalanced. Therefore, the problem channelized entrance lane is identified, namely the intersection entrance lane for judging the unbalanced lane sharing rate.
The basis for the occurrence of lane sharing rate imbalance within a specific time interval ti is formula (3):
wherein,representing the ith lane imbalance index, and calculating formula (4) as follows:
the lane unbalance index is 0, which represents that the lane pressure sharing rate accords with the normal level, and the lane unbalance index is 1, which represents that the lane pressure sharing rate is too small or too large. Wherein σ is a standard deviation of the sharing rate of all lanes in the time interval, and the calculation formula (5) is as follows:
the lane sharing rate is briefly unbalanced in the time interval ti, and the long-term problem of entrance canalization cannot be represented, so that the identification of the long-term imbalance of the lane pressure sharing rate is meaningful. For this purpose, a number of unbalance determinations are made for different time periods:
within 24 hours a day, the time interval number of the unbalance of the lane pressure sharing rate is(value is [0,288 ]]). When in useIndicating that lane pressure share rate imbalance occurs on the current day. Wherein, deltaD(value is [1,288 ]]) A threshold is determined for daily rate imbalance.
The number of days in a month when lane pressure sharing rate imbalance occurs is(values of [0,30 ]]Assuming a month by 30 days). When in useIndicating that lane pressure share rate imbalance occurred in the month. Wherein, deltaM(values of [1,30 ]]) A threshold is determined for monthly allocation rate imbalance.
The number of days in a quarter when lane pressure sharing rate imbalance occurs is(value is [0,90 ]]Assuming a quarter by 90 days). When in useIndicating that lane pressure share rate imbalance occurred in the month. Wherein, deltaS(value is [1,90 ]]) A threshold is determined for quarterly allocation rate imbalance.
In the process of identifying the problematic canalized inlet channel, 3 judgment threshold parameters are involved, wherein the parameters are respectively deltat_D、δD_MAnd deltaD_SThe three threshold parameters have different value ranges. The smaller the set value of the threshold parameter, i.e. the higher the sensitivity of the identification method, the easier the intersection entrance lane is identified as the entrance lane with problems in channeling. For this purpose, threshold parameters of different sensitivities are given to suit different demanding scenarios, as shown in table 1.
TABLE 1 threshold parameters for different sensitivities
And 204, determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane.
After the entrance lane of the first intersection with the channeling problem is identified, the average value of the pressure sharing rates of all directions under different time scales needs to be further calculated according to the queuing pressure sharing rates of all lanes, so that the channeling of the entrance lane is optimized and corrected.
In a specific period, the queuing pressure sharing rate of each direction of the intersection entrance road is respectively (m directions of travel, number of lanes in direction o)1,o2,...,om) The calculation pseudo code is shown in table 2.
TABLE 2 pseudo code for queuing pressure sharing rate calculation in each direction
The pressure sharing rate of each driving direction of the inlet passage can be obtained through the mode.
And step 205, performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
After the pressure sharing rate of each driving worry is obtained, the lane at the entrance of the first intersection can be corrected, and the correction can be mainly as follows: firstly, determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane. And then determining the number of lanes to be distributed in each traffic direction according to the pressure sharing rate of each traffic direction and the target value of the pressure sharing rate of the first intersection entrance lane. And finally, reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in the vehicle directions and the actual number of the lanes in the vehicle directions.
Under the condition that the queuing pressure sharing rate of each direction of the inlet channel is known, the pressure sharing rate of each direction is balanced as a target, namely the pressure sharing rate of each lane of each direction is equal, and the channelized correction of the inlet channel is carried out. Accordingly, the target value of the pressure sharing rate of all lanes of the entrance way is formula (6):
the logic to assign lanes for each direction is then: and after the pressure sharing rate in each direction is spread to each lane, the pressure sharing rates of all the lanes tend to be consistent. The number of lanes that should be allocated per direction can be calculatedThe calculation formula (7) is as follows:
…
in an ideal situation, the sum of the number of the lanes in each direction is calculatedAnd the sum o of the number of lanes in each direction in the existing canalization1+o2+...+omAre equal.
And performing channelized optimization improvement on the intersection entrance lane, namely, performing the process of reallocating lanes for the driving direction of each entrance lane under the condition that the number of the existing lanes is unchanged. Each lane is assigned with 3 driving directions at most by default and is the turn in the intersection entrance laneiImproved flow for channelizing direction-allocated lanes and intersection entrance lanesThe process is shown in fig. 4. The method comprises the following steps:
(1) judging whether the shared lane which is not distributed exists on the leftmost side, and if so, turning to the step (2); if not, go to step (3).
(2) Occupying all shared lanes and updatingAnd (4) turning to the step (3).
(3) After judging updatingWhether the integer part is larger than 0 or not, if so, turning to the step (4); if not, go to step (5).
(4) Distributing a corresponding integral number of lanes, and turning to the step (5);
(5) after judging updatingTaking the value of the decimal part, and if the value is [0.5,1 ], turning to the step (6); if the value is [0.3,0.5 ], turning to the step (7); if the value is (0,0.3), no lane is allocated, and the step (8) is carried out.
(6) Judgment ofIf the lane exists, if the lane does not exist, no lane is allocated, and the step (8) is carried out; if so, allocateAnd (4) turning to the step (8).
(7) Judgment ofIf the lane exists, if the lane does not exist, no lane is allocated, and the step (8) is carried out; if so, allocateAnd (4) turning to the step (8).
(8) The allocation is finished.
The embodiment shows that the cross-section vehicle number, the cross-section average vehicle length and the maximum queuing length of each lane of the intersection entrance lane within the preset time interval are obtained, the pressure sharing rate of each lane is determined according to the cross-section vehicle number, the maximum queuing length and the cross-section average vehicle length, the first intersection entrance lane is determined according to the pressure sharing rate of each lane, the standard difference of the pressure sharing rate of the intersection entrance lane and the imbalance threshold value of the sharing rate, the pressure sharing rate of each traffic direction of the first intersection entrance lane is determined according to the pressure sharing rate of each lane of the first intersection entrance lane, and the first intersection entrance lane is subjected to channelized correction according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each traffic direction. The method comprises the steps of establishing a lane pressure sharing rate unbalance judgment system based on the pressure sharing rate of each lane of an entrance lane to identify whether the queuing of each lane in the entrance lane of the intersection is unbalanced under different time scales, and accordingly, unreasonably channeling the entrance lane.
The intersection entrance lane data channelizing method provided by the embodiment of the invention is used for detecting the lane-level queuing length and the traffic flow in real time based on the intersection multi-target radar equipment, accurately sensing the road traffic demand, calculating the queuing pressure sharing rate of each lane in the intersection entrance lane, identifying the entrance lane with the channelized problem according to the queuing pressure sharing rate, and providing an optimization scheme. The implementation of the invention has two beneficial effects: on one hand, by using the queuing length and traffic flow data of the multi-target radar detector, intersection entrance roads with canalization problems can be accurately and quantitatively identified, key nodes influencing the traffic efficiency of a road network are found, and the intellectualization level of finding the canalization problems is improved; on the other hand, the method calculates the queuing pressure sharing rate of each direction of the entrance road based on the lane-level traffic flow data, optimizes and improves the channelization of the entrance road, has full and detailed data support, and improves the rationality and the scientificity of the optimization and improvement of the channelization of the intersection entrance road. Meanwhile, the method has very important application value in the aspects of reducing travel delay, relieving traffic jam, reducing carbon emission and the like.
Based on the same technical concept, fig. 5 exemplarily illustrates a structure of an intersection entrance lane data channelizing apparatus according to an embodiment of the present invention, which may perform a process of intersection entrance lane data channelizing, and the apparatus may be located in the server 100 shown in fig. 1, or may be the server 100.
As shown in fig. 5, the apparatus specifically includes:
the acquiring unit 501 is configured to acquire the number of cross-section vehicles, the average length of cross-section vehicles, and the maximum queuing length of each lane of the intersection entrance lane within a preset time interval;
the processing unit 502 is configured to determine a pressure sharing rate of each lane according to the number of cross-section vehicles, the maximum queuing length, and the cross-section average vehicle length; determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold; the first intersection entrance lane is an intersection entrance lane with a canalization problem; determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane; and performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
Optionally, the processing unit 502 is specifically configured to:
and acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval through a multi-target radar.
Optionally, the processing unit 502 is specifically configured to:
determining the maximum number of queued vehicles in each preset time interval according to the maximum queuing length and the average section length;
and determining the pressure sharing rate of each lane according to the maximum number of the queued vehicles and the number of the cross-section vehicles.
Optionally, the allocation rate imbalance threshold comprises allocation rate imbalance thresholds for a plurality of time periods;
the processing unit 502 is specifically configured to:
determining lane unbalance indexes of the lanes according to the pressure sharing rate of the lanes and the standard deviation of the pressure sharing rate of the intersection entrance lane;
determining the number of imbalances occurring in each time period according to the lane imbalance index of each lane;
and determining the intersection entrance lane with the unbalance quantity in each time period larger than the sharing rate unbalance threshold value corresponding to each time period as a first intersection entrance lane.
Optionally, the processing unit 502 is specifically configured to:
determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
determining the number of lanes to be allocated in each driving direction according to the pressure sharing rate of each driving direction and the target value of the pressure sharing rate of the first intersection entrance lane;
and reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in each driving direction and the actual number of the lanes in each vehicle direction.
Based on the same technical concept, an embodiment of the present invention further provides a computing device, including:
a memory for storing program instructions;
and the processor is used for calling the program instruction stored in the memory and executing the intersection approach data channelizing method according to the obtained program.
Based on the same technical concept, the embodiment of the invention also provides a computer-readable non-volatile storage medium, which comprises computer-readable instructions, and when the computer reads and executes the computer-readable instructions, the computer is enabled to execute the intersection approach data canalization method.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A method for channeling intersection entrance lane data is characterized by comprising the following steps:
acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of an intersection entrance lane within a preset time interval;
determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average vehicle length of the section;
determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold; the first intersection entrance lane is an intersection entrance lane with a canalization problem;
determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
and performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
2. The method of claim 1, wherein the obtaining of the number of cross-sectional vehicles, the cross-sectional average vehicle length, and the maximum queuing length for each lane of the intersection approach over a preset time interval comprises:
and acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval through a multi-target radar.
3. The method of claim 1, wherein the determining the pressure sharing rate of each lane according to the number of vehicles in the section, the maximum queuing length and the average vehicle length in the section comprises:
determining the maximum number of queued vehicles in each preset time interval according to the maximum queuing length and the average section length;
and determining the pressure sharing rate of each lane according to the maximum number of the queued vehicles and the number of the cross-section vehicles.
4. The method of claim 1, wherein the allocation rate imbalance threshold comprises an allocation rate imbalance threshold for a plurality of time periods;
determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and the sharing rate imbalance threshold value, including:
determining lane unbalance indexes of the lanes according to the pressure sharing rate of the lanes and the standard deviation of the pressure sharing rate of the intersection entrance lane;
determining the number of imbalances occurring in each time period according to the lane imbalance index of each lane;
and determining the intersection entrance lane with the unbalance quantity in each time period larger than the sharing rate unbalance threshold value corresponding to each time period as a first intersection entrance lane.
5. The method of any one of claims 1 to 4, wherein the channelizing correction of the first intersection approach as a function of the pressure share rates for the respective lanes and the respective driving directions of the first intersection approach comprises:
determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
determining the number of lanes to be allocated in each driving direction according to the pressure sharing rate of each driving direction and the target value of the pressure sharing rate of the first intersection entrance lane;
and reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in each driving direction and the actual number of the lanes in each vehicle direction.
6. An apparatus for channeling intersection approach data, comprising:
the acquisition unit is used for acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance lane within a preset time interval;
the processing unit is used for determining the pressure sharing rate of each lane according to the number of the vehicles on the section, the maximum queuing length and the average vehicle length of the section; determining a first intersection entrance lane according to the pressure sharing rate of each lane, the standard deviation of the pressure sharing rate of the intersection entrance lane and a sharing rate unbalance threshold; the first intersection entrance lane is an intersection entrance lane with a canalization problem; determining the pressure sharing rate of each driving direction of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane; and performing channelized correction on the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane and the pressure sharing rate of each driving direction.
7. The apparatus as claimed in claim 6, wherein said processing unit is specifically configured to:
and acquiring the number of section vehicles, the average length of the section vehicles and the maximum queuing length of each lane of the intersection entrance road within a preset time interval through a multi-target radar.
8. The apparatus as claimed in claim 6, wherein said processing unit is specifically configured to:
determining the maximum number of queued vehicles in each preset time interval according to the maximum queuing length and the average section length;
and determining the pressure sharing rate of each lane according to the maximum number of the queued vehicles and the number of the cross-section vehicles.
9. The apparatus of claim 6, wherein the allocation rate imbalance threshold comprises an allocation rate imbalance threshold for a plurality of time periods;
the processing unit is specifically configured to:
determining lane unbalance indexes of the lanes according to the pressure sharing rate of the lanes and the standard deviation of the pressure sharing rate of the intersection entrance lane;
determining the number of imbalances occurring in each time period according to the lane imbalance index of each lane;
and determining the intersection entrance lane with the unbalance quantity in each time period larger than the sharing rate unbalance threshold value corresponding to each time period as a first intersection entrance lane.
10. The apparatus according to any one of claims 6 to 9, wherein the processing unit is specifically configured to:
determining a target value of the pressure sharing rate of the first intersection entrance lane according to the pressure sharing rate of each lane of the first intersection entrance lane;
determining the number of lanes to be allocated in each driving direction according to the pressure sharing rate of each driving direction and the target value of the pressure sharing rate of the first intersection entrance lane;
and reallocating the fleet for the vehicle directions at the entrance of the first intersection according to the number of the lanes to be allocated in each driving direction and the actual number of the lanes in each vehicle direction.
11. A computing device, comprising:
a memory for storing program instructions;
a processor for calling program instructions stored in said memory to execute the method of any one of claims 1 to 5 in accordance with the obtained program.
12. A computer-readable non-transitory storage medium including computer-readable instructions which, when read and executed by a computer, cause the computer to perform the method of any one of claims 1 to 5.
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