CN111540197B - Lane function division method and device, electronic equipment and storage medium - Google Patents
Lane function division method and device, electronic equipment and storage medium Download PDFInfo
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- CN111540197B CN111540197B CN202010304326.9A CN202010304326A CN111540197B CN 111540197 B CN111540197 B CN 111540197B CN 202010304326 A CN202010304326 A CN 202010304326A CN 111540197 B CN111540197 B CN 111540197B
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Abstract
The invention discloses a lane function division method, a lane function division device, electronic equipment and a storage medium, wherein the method comprises the following steps: determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function aiming at the lane of each function; calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value; and performing lane function division according to the target number of each lane. When the lane function division is carried out according to the target number of each lane, the traffic capacity of the intersection is optimal, so that the problem of intersection congestion can be solved to the greatest extent.
Description
Technical Field
The present invention relates to the field of traffic technologies, and in particular, to a lane function partitioning method and apparatus, an electronic device, and a storage medium.
Background
With the development of the urbanization process, the urban traffic congestion problem is increasingly serious, wherein the congestion phenomenon at the intersection of a road signal lamp is particularly serious. Unreasonable lane function division of the intersection is an important reason for intersection congestion. For example, at an intersection where the left-turn traffic flow is much larger than the straight traffic flow, if the number of left-turn lanes is smaller than the number of straight lanes, the function division of the left-turn lanes and the straight lanes is unbalanced, the traffic efficiency at the intersection is reduced, and the intersection is congested.
Therefore, providing a reasonable lane function division scheme is the key to solve the intersection congestion problem.
Disclosure of Invention
The embodiment of the invention provides a lane function division method and device, electronic equipment and a storage medium, which are used for providing a reasonable lane function division scheme to solve the problem of intersection congestion.
The embodiment of the invention provides a lane function division method, which comprises the following steps:
determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function aiming at the lane of each function;
calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
and performing lane function division according to the target number of each lane.
Further, the traffic capacity parameter calculation formula comprises:
where C is the traffic capacity parameter, s is the single lane saturation flow rate, T is the signal cycle length, gLEffective green time for left turn lane, gTEffective green time for straight-through lanes, gREffective green time for right-turn lanes, NLNumber of left-turn lanes, NTNumber of straight lanes, NRThe number of right-turn lanes.
Further, before the dividing the lane function according to the target number of each lane, the method further includes:
calculating a formula according to the traffic capacity parameters to determine the current traffic capacity parameters of the intersection, and determining lane function division imbalance coefficients according to the current traffic capacity parameters and the maximum values of the traffic capacity parameters;
and judging whether the lane function division imbalance coefficient is in a preset numerical range, and if so, carrying out the subsequent steps.
Further, the determining the lane function division imbalance coefficient according to the current traffic capacity parameter and the maximum value that can be taken by the traffic capacity parameter includes:
substituting the current traffic capacity parameter and the maximum value which can be taken by the traffic capacity parameter into an imbalance coefficient formula
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
as a current traffic capacity parameter, C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
In another aspect, an embodiment of the present invention provides a lane function dividing apparatus, where the apparatus includes:
the first determination module is used for determining the sum of the green light time in the single cycle of the lane of each function, and regarding the lane of each function, the product of the ratio of the flow rate and the number of the lanes of the function and the sum is used as the effective green light time of the lane of the function;
the second determination module is used for calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
and the dividing module is used for dividing lane functions according to the target number of each lane.
Further, the traffic capacity parameter calculation formula comprises:
where C is the traffic capacity parameter, s is the single lane saturation flow rate, T is the signal cycle length, gLEffective green time for left turn lane, gTEffective green time for straight-through lanes, gREffective green time for right-turn lanes, NLNumber of left-turn lanes, NTNumber of straight lanes, NRThe number of right-turn lanes.
Further, the apparatus further comprises:
the judging module is used for calculating a formula according to the traffic capacity parameters to determine the current traffic capacity parameters of the intersection and determining lane function division imbalance coefficients according to the current traffic capacity parameters and the maximum values which can be taken by the traffic capacity parameters; and judging whether the lane function division unbalanced coefficient is in a preset numerical range, and if so, triggering the division module.
Further, the judging module is specifically configured to substitute an imbalance coefficient formula according to the current traffic capacity parameter and a maximum value that can be taken by the traffic capacity parameter
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
as a current traffic capacity parameter, C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
On the other hand, the embodiment of the invention provides electronic equipment, which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
a memory for storing a computer program;
a processor for implementing any of the above method steps when executing a program stored in the memory.
In another aspect, an embodiment of the present invention provides a computer-readable storage medium, in which a computer program is stored, and the computer program, when executed by a processor, implements the method steps of any one of the above.
The embodiment of the invention provides a lane function division method, a lane function division device, electronic equipment and a storage medium, wherein the method comprises the following steps: determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function aiming at the lane of each function; calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value; and performing lane function division according to the target number of each lane.
In the embodiment of the invention, basic data of the lanes of each function are firstly counted, including the flow and the number of the lanes of each function, then all data required in the traffic capacity parameter calculation formula are determined based on the basic data, all the data are substituted into the traffic capacity parameter calculation formula, and the target number of each lane when the traffic capacity parameter takes the maximum value is calculated. When the lane function division is carried out according to the target number of each lane, the traffic capacity of the intersection is optimal, so that the problem of intersection congestion can be solved to the greatest extent.
Drawings
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 lane function dividing process provided by an embodiment of the invention;
FIG. 2 is a flowchart of a method for calculating imbalance coefficients of left-turn lanes and straight-going lanes according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lane function dividing device according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and 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 is a schematic diagram of a lane function dividing process provided by an embodiment of the present invention, where the process includes the following steps:
s101: and determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function for the lane of each function.
S102: and determining the target number of each lane when the traffic capacity parameter takes the maximum value according to the effective green time of each functional lane, the preset single lane saturation flow rate, the preset signal lamp period length and the traffic capacity parameter calculation formula.
S103: and performing lane function division according to the target number of each lane.
The lane function dividing method provided by the embodiment of the invention is applied to electronic equipment, and the electronic equipment can be equipment such as a PC (personal computer), a tablet personal computer and the like.
For an intersection to be subjected to lane function division, the electronic equipment firstly determines the sum of the green time in a single cycle of each function lane, and counts and records the flow and the number of each function lane at the intersection. Calculating the product of the ratio of the flow rate and the quantity of the lanes of each function and the sum value to obtain the product of the flow rate and the quantity of the lanes of each functionThe effective green time of the lane of this function. For example, the sum of the green time in a single cycle of the lane for each function is TGeneral assemblyThe flow rate of the left-turn lane is QLThe number of left-turn lanes is NLThen, determining the effective green time of the left-turn lane as gL＝(QL/NL)*TGeneral assembly. The flow rate of the straight traffic lane is QTThe number of straight lanes is NTThen, the effective green time of the straight lane is determined as gT＝(QT/NT)*TGeneral assembly. The flow rate of the right-turn lane is QRThe number of right-turn lanes is NRThen, determining the effective green time of the right-turn lane as gR＝(QR/NR)*TGeneral assembly。
The electronic equipment determines the target number of each lane when the traffic capacity parameter takes the maximum value according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp period length and the traffic capacity parameter calculation formula. The traffic capacity parameter calculation formula comprises the following steps:
wherein C is a traffic capacity parameter, s is a single lane saturation flow rate, T is a preset signal lamp period length, and gLEffective green time for left turn lane, gTEffective green time for straight-through lanes, gREffective green time for right-turn lanes, NLNumber of left-turn lanes, NTNumber of straight lanes, NRThe number of right-turn lanes.
In the above formula, the single lane saturation flow rate is the flow rate of the traffic flow passing through the single lane in the saturation state, and usually takes 1200 and 1800 cars/hour, and the signal lamp period length is the length of one signal lamp period, and usually takes 80 to 180 seconds. Both values are preset values. The number of lanes of each function is a positive value and takes a value between 0 and N, wherein N is the total number of lanes on the road. And traversing all the lane function division combinations to find the maximum traffic capacity parameter, taking the number of each lane in the optimal lane function division combination as the target number, and performing lane function division according to the target number of each lane.
In the embodiment of the invention, basic data of the lanes of each function are firstly counted, including the flow and the number of the lanes of each function, then all data required in the traffic capacity parameter calculation formula are determined based on the basic data, all the data are substituted into the traffic capacity parameter calculation formula, and the target number of each lane when the traffic capacity parameter takes the maximum value is calculated. When the lane function division is carried out according to the target number of each lane, the traffic capacity of the intersection is optimal, so that the problem of intersection congestion can be solved to the greatest extent.
In an embodiment of the present invention, in order to reduce the cost of lane function division, it may be further determined whether lane function division needs to be performed again, and before performing lane function division according to the target number of each lane, the method further includes:
calculating a formula according to the traffic capacity parameters to determine the current traffic capacity parameters of the intersection, and determining lane function division imbalance coefficients according to the current traffic capacity parameters and the maximum values of the traffic capacity parameters;
and judging whether the lane function division imbalance coefficient is in a preset numerical range, and if so, carrying out the subsequent steps.
In the embodiment of the invention, the number of lanes with each function planned at the intersection at present, the determined saturation flow rate of the single lane, the period length of the signal lamp and the effective green time of the lane with each function are substituted into the traffic capacity parameter calculation formula
The current traffic capacity parameter can be calculated, and then the lane function division imbalance coefficient is determined according to the current traffic capacity parameter and the maximum value which can be taken by the traffic capacity parameter. For example, the traffic energy can be adjustedThe ratio of the maximum value of the force parameter to the current traffic capacity parameter is used as a lane function division imbalance coefficient. Judging whether the lane function division imbalance coefficient is within a preset numerical range, if so, indicating that the lanes divided at the current intersection are unreasonable and seriously influencing traffic, and performing lane function division according to the target number of each lane; if not, the lane divided at the current intersection is relatively reasonable, and the lane function division can not be carried out again in consideration of the cost.
Preferably, the determining the lane function division imbalance coefficient according to the current traffic capacity parameter and the maximum value that can be taken by the traffic capacity parameter includes:
substituting the current traffic capacity parameter and the maximum value which can be taken by the traffic capacity parameter into an imbalance coefficient formula
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
as a current traffic capacity parameter, C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
In the embodiment of the present invention, when the current lane function division is consistent with the lane function division when the traffic capacity parameter is the maximum, the imbalance coefficient of the lane function division is 0, otherwise, the coefficient is between 0 and 1, and therefore the preset numerical range may be 0.1 to 0.3.
It should be noted that before prompting whether to perform lane function division, the lane function division imbalance coefficient may be calculated multiple times according to a preset period, and if the lane function division imbalance coefficients obtained through multiple calculations are within a preset numerical range, the subsequent lane function division step is performed.
In an actual scene, the right-turn lane is not controlled by the signal lamp, so in order to improve the efficiency of the lane functional division, only whether the functional division of the left-turn lane and the straight lane is balanced or not can be considered. Next, whether the function division of the left-turn lane and the straight lane is balanced will be described as an example.
The lane function division method provided by the embodiment of the invention comprises four steps, as shown in fig. 2, including basic data preparation, current traffic capacity parameter calculation, maximum traffic capacity parameter calculation, and unbalance coefficient calculation of left-turn and straight lanes.
Considering an entrance lane at an intersection, the number of left-turn lanes is NLThe number of the straight lanes is NTThe total number of left-turn and straight lanes N is NL+NTIs a constant value. Left-turn lane flow Q of a certain time span of the vehicle is collectedLAnd straight lane flow QT。
Ideally, the green time of the left turn and straight flow at the intersection approach should match the traffic flow. Left turn and straight line saturation equalization is a common signal optimization control method. In the case of equal saturation, the green light distribution of the signal light is determined by the equations (1) (2).
gL+gT＝G (2)
Wherein, gLEffective green time of left-turn lane, gTIs the effective green time of the straight-going lane. G is the total effective green time for the left turn lane and the straight lane.
The total traffic capacity parameters of the left-turn and straight-going lanes can be deduced as follows:
wherein
For the traffic capacity parameter, s is the saturation flow rate of a single lane and T is the signal light cycle length. The single lane saturated flow rate is referred to as crossThe flow rate of the through flow through the single lane in the saturation state is usually 1200-1800 cars/hour, and the signal light cycle length is the length of one signal light cycle, and is usually between 80 seconds and 180 seconds. S and T are preset values.
Substituting equations (1) and (2) into equation (3) yields:
from equation (4), it can be seen that the magnitude of the traffic capacity is related to the ratio of the left-turn lane flow to the straight lane flow and the distribution of the number of lanes when the signal cycle length, the total effective green time for left-turn and straight-going, and the saturation flow rate of the single lane are fixed.
Under a certain left-turn lane and straight lane flow ratio, the maximum total capacity of the left-turn lane and straight lane can be determined by the following formula:
nL+nT＝N (5b)
wherein n isLAnd nTAs variables, the number of left-turn lanes and the number of straight lanes are indicated.
The solution of equation (5a-b) is simple. Because of the number of left-turn lanes and the number of straight lanes nLAnd nTAll the numbers are positive numbers and the values are between 1 and N-1, and the maximum value of the traffic capacity C can be found by traversing all the possible combinations. Then the optimal number of left-turn lanes and straight lanes is recorded as
And
maximum traffic capacity of C*。
Defining the imbalance coefficient rho of left-turn lane and straight lane, and taking the imbalance coefficient rho according to the current situation traffic capacity
And theoretical maximum traffic capacity C*And (5) comparing to obtain. One way of definition can be given by equation (6):
wherein the current traffic capacity parameter
The maximum traffic capacity parameter C is given by the current lane division state according to the formula (4)*Solved by the formula (5 a-b).
In this way, when the current lane function division is consistent with the lane function division with the maximum traffic capacity, the imbalance coefficient of the left-turn lane and the straight lane is 0, otherwise, the imbalance coefficient is between 0 and 1. And judging whether the unbalanced coefficient of the lane function division is in a preset numerical range, if so, performing the lane function division again, and if not, not performing the lane function division.
The embodiment of the invention provides a method for calculating the imbalance coefficients of left-turn lanes and straight-going lanes at a signal lamp intersection. The coefficient can intuitively and clearly represent the unreasonable degree of lane function division, and can be used for guiding the optimization of lane functions or the layout of variable lanes.
Fig. 3 is a schematic structural diagram of a lane function dividing apparatus according to an embodiment of the present invention, the apparatus includes:
a first determining module 31, configured to determine a sum of green light time in a single cycle of a lane of each function, and regarding the lane of each function, taking a product of a ratio of a flow rate and a number of the lanes of the function and the sum as an effective green light time of the lane of the function;
a second determination module 32, configured to calculate a formula according to the valid green time of the lane of each function, a preset single lane saturation flow rate, a preset signal lamp cycle length, and a traffic capacity parameter, and determine a target number of each lane when the traffic capacity parameter takes a maximum value;
and a dividing module 33, configured to perform lane function division according to the target number of each lane.
The traffic capacity parameter calculation formula comprises:
where C is the traffic capacity parameter, s is the single lane saturation flow rate, T is the signal cycle length, gLEffective green time for left turn lane, gTEffective green time for straight-through lanes, gREffective green time for right-turn lanes, NLNumber of left-turn lanes, NTNumber of straight lanes, NRThe number of right-turn lanes.
The device further comprises:
the judging module 34 is used for calculating a formula according to the traffic capacity parameter to determine a current traffic capacity parameter of the intersection, and determining a lane function division imbalance coefficient according to the current traffic capacity parameter and the maximum value which can be taken by the traffic capacity parameter; and judging whether the lane function division imbalance coefficient is in a preset numerical range, and if so, triggering the division module 33.
The judging module 34 is specifically configured to substitute an imbalance coefficient formula according to the current traffic capacity parameter and a maximum value that can be taken by the traffic capacity parameter
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
at present, forTraffic capacity parameter of C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
An embodiment of the present invention further provides an electronic device, as shown in fig. 4, including: the system comprises a processor 301, a communication interface 302, a memory 303 and a communication bus 304, wherein the processor 301, the communication interface 302 and the memory 303 complete mutual communication through the communication bus 304;
the memory 303 has stored therein a computer program which, when executed by the processor 301, causes the processor 301 to perform the steps of:
determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function aiming at the lane of each function;
calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
and performing lane function division according to the target number of each lane.
Based on the same inventive concept, the embodiment of the present invention further provides an electronic device, and as the principle of solving the problem of the electronic device is similar to the lane function division method, the implementation of the electronic device may refer to the implementation of the method, and repeated details are not repeated.
The electronic device provided by the embodiment of the invention can be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), a network side device and the like.
The communication bus mentioned in the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface 302 is used for communication between the above-described electronic apparatus and other apparatuses.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like.
When the processor executes the program stored in the memory in the embodiment of the invention, the sum of the green light time in the single cycle of the lane of each function is determined, and the product of the ratio of the flow rate and the number of the lanes of the function and the sum is taken as the effective green light time of the lanes of the function aiming at the lanes of each function; calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value; and performing lane function division according to the target number of each lane. In the embodiment of the invention, basic data of the lanes of each function are firstly counted, including the flow and the number of the lanes of each function, then all data required in the traffic capacity parameter calculation formula are determined based on the basic data, all the data are substituted into the traffic capacity parameter calculation formula, and the target number of each lane when the traffic capacity parameter takes the maximum value is calculated. When the lane function division is carried out according to the target number of each lane, the traffic capacity of the intersection is optimal, so that the problem of intersection congestion can be solved to the greatest extent.
An embodiment of the present invention further provides a computer storage readable storage medium, in which a computer program executable by an electronic device is stored, and when the program runs on the electronic device, the electronic device is caused to execute the following steps:
determining the sum of the green light time in the single cycle of the lane of each function, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum as the effective green light time of the lanes of the function aiming at the lane of each function;
calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
and performing lane function division according to the target number of each lane.
Based on the same inventive concept, embodiments of the present invention further provide a computer-readable storage medium, and since the principle of solving the problem when the processor executes the computer program stored in the computer-readable storage medium is similar to the lane function dividing method, the implementation of the computer program stored in the computer-readable storage medium by the processor may refer to the implementation of the method, and repeated details are not repeated.
The computer readable storage medium may be any available medium or data storage device that can be accessed by a processor in an electronic device, including but not limited to magnetic memory such as floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc., optical memory such as CDs, DVDs, BDs, HVDs, etc., and semiconductor memory such as ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs), etc.
The computer readable storage medium provided in the embodiment of the invention stores a computer program, and the computer program is used for determining the sum value of the green light time in the single cycle of the lane of each function when being executed by a processor, and taking the product of the ratio of the flow rate and the number of the lanes of the function and the sum value as the effective green light time of the lane of the function aiming at the lane of each function; calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value; and performing lane function division according to the target number of each lane. In the embodiment of the invention, basic data of the lanes of each function are firstly counted, including the flow and the number of the lanes of each function, then all data required in the traffic capacity parameter calculation formula are determined based on the basic data, all the data are substituted into the traffic capacity parameter calculation formula, and the target number of each lane when the traffic capacity parameter takes the maximum value is calculated. When the lane function division is carried out according to the target number of each lane, the traffic capacity of the intersection is optimal, so that the problem of intersection congestion can be solved to the greatest extent.
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 (6)
1. A lane function dividing method, characterized by comprising:
calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
performing lane function division according to the target number of each lane;
wherein, the number of left-turn lanes is NLThe number of the straight lanes is NTAnd collecting the left-turn lane flow Q of a certain time spanLAnd straight lane flow QT；
nL+nT＝N；
Wherein, gLEffective green time of left-turn lane, gTIs the effective green time of the straight-going lane, G is the total effective green time of the left-turning lane and the straight-going lane,
the traffic capacity parameter is s, the saturation flow rate of a single lane is s, and the period length of a signal lamp is T;
number of left-turn lanes and number of straight lanes nLAnd nTThe numbers are positive numbers, the values are between 1 and N-1, and the maximum value of the traffic capacity C is found by traversing all combinations;
before the dividing of the lane function according to the target number of each lane, the method further includes:
calculating a formula according to the traffic capacity parameters to determine the current traffic capacity parameters of the intersection, and determining lane function division imbalance coefficients according to the current traffic capacity parameters and the maximum values of the traffic capacity parameters;
judging whether the lane function division imbalance coefficient is within a preset numerical range or not, and if so, carrying out subsequent steps;
and calculating the lane function division imbalance coefficients for multiple times according to a preset period before prompting whether to perform lane function division, and performing subsequent lane function division if the lane function division imbalance coefficients obtained through multiple calculation are within a preset numerical range.
2. The method of claim 1, wherein determining a lane function split imbalance factor based on the current traffic capacity parameter and a maximum value that the traffic capacity parameter can take comprises:
substituting the current traffic capacity parameter and the maximum value which can be taken by the traffic capacity parameter into an imbalance coefficient formula
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
as a current traffic capacity parameter, C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
3. A lane function dividing apparatus, characterized in that the apparatus comprises:
the second determination module is used for calculating a formula according to the effective green time of the lane of each function, the preset single lane saturation flow rate, the preset signal lamp cycle length and the traffic capacity parameter, and determining the target number of each lane when the traffic capacity parameter takes the maximum value;
the dividing module is used for dividing lane functions according to the target number of each lane;
wherein, the number of left-turn lanes is NLThe number of the straight lanes is NTAnd collecting the left-turn lane flow Q of a certain time spanLAnd straight lane flow QT；
nL+nT＝N；
Wherein, gLEffective green time of left-turn lane, gTIs the effective green time of the straight-going lane, G is the total effective green time of the left-turning lane and the straight-going lane,
the traffic capacity parameter is s, the saturation flow rate of a single lane is s, and the period length of a signal lamp is T;
number of left-turn lanes and number of straight lanes nLAnd nTThe numbers are positive numbers, the values are between 1 and N-1, and the maximum value of the traffic capacity C is found by traversing all combinations;
the judging module is used for calculating a formula according to the traffic capacity parameters to determine the current traffic capacity parameters of the intersection and determining lane function division imbalance coefficients according to the current traffic capacity parameters and the maximum values which can be taken by the traffic capacity parameters; judging whether the lane function division unbalanced coefficient is in a preset numerical range or not, and if so, triggering the division module;
and calculating the lane function division imbalance coefficients for multiple times according to a preset period before prompting whether to perform lane function division, and performing subsequent lane function division if the lane function division imbalance coefficients obtained through multiple calculation are within a preset numerical range.
4. The device according to claim 3, wherein the determining module is specifically configured to substitute an imbalance according to the current traffic capacity parameter and a maximum value that can be taken by the traffic capacity parameterCoefficient formula
Determining a lane function division imbalance coefficient; wherein the content of the first and second substances,
as a current traffic capacity parameter, C*And rho is a maximum value which can be taken by the traffic capacity parameter, and is a lane function division imbalance coefficient.
5. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of claim 1 or 2 when executing a program stored in the memory.
6. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of claim 1 or 2.
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