A Coordinated Control Method of Traffic Signals at Arterial Intersections Based on Non-Isoperiod

Abstract

The invention relates to a traffic signal coordination control method at an arterial intersection based on non-equal period, and the invention relates to a traffic signal coordination control method. The invention aims to solve the problems of limited width of the existing green wave, low utilization rate of the coordinated phase green light, and many parking times of motor vehicles. The process is as follows: collect the entrance lane flow of each intersection; calculate the cycle duration of single-point control; divide the intersection into Type I and Type II; determine the value range of the public cycle; define the parameters of the arterial system; Constraints and the equivalent relationship between period and phase green light; Divide the intersection into different sets; Determine the start and end time of the green light; Determine the departure time of the leading vehicle and the trailing vehicle in coordinated traffic flow; Calculate the bandwidth of the three types of green waves; Construct a type I intersection When the straight line phase of the main line is not adjacent to the left turn of the intersecting road and when it is adjacent, the main line forms a green wave belt constraint; determine the objective function; determine the signal timing parameters of each intersection. The invention is used in the technical field of urban traffic control.

Description

technical field

[0001] The invention relates to a traffic signal coordination control method at an arterial intersection. The utility model belongs to the technical field of urban traffic control. Background technique

[0002] Arterial coordinated control is an important way of urban traffic control. Reasonable arterial coordination can greatly reduce traffic flow delays on arterial roads and improve the traffic efficiency of intersection groups. In the traditional arterial coordinated control method, all intersections have to execute the same cycle length, that is, the common cycle. It is generally applicable to adjacent intersections with relatively close flow rates and geometric structures. The common urban road network structure is generally to arrange several secondary arterial roads or branch roads between two main roads, so that the traffic flow can be reasonably collected and distributed. At this time, there are large differences in the geometric structure and tra...

Examples

specific Embodiment approach 1

[0066] Specific implementation mode 1: In this implementation mode, a method for coordinated control of traffic signals at arterial intersections based on a non-isoperiodic period. The specific process is as follows:

[0067] Step 1: The coordinated control area includes a total of N adjacent signalized intersections, collecting the entrance lane flow of each intersection within a given period of time;

[0068] Step 2: The number of the intersection is 1, 2,...,n...,N; there is I at the intersection n n Phases, numbered 1,2,…,i n ..., I n , calculate the cycle time C when intersection n executes single-point control (control of a single intersection, regardless of the control of other intersections) n , the unit is s; the specific process is:

[0069] Step 21. Calculate the initial period C of the intersection n 0,n , unit s; C 0,n The formula is:

[0070]

[0071] In the formula, L n is the total green light loss time of intersection n (green light time that cannot ...

specific Embodiment approach 2

[0122] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in the step 6, the constraint of constructing the phase combination scheme and the equivalent relationship between the cycle and the phase green light; the specific process is:

[0123]

[0124]

[0125]

[0126]

[0127]

[0128] In the formula: g n,1 It is the duration of the green light for the downlink straight phase of an odd-numbered period at a Type I intersection or Type II intersection (use g when the intersection is Type I n,1 means that when the intersection is class II, g n,1 Indicates the straight-going phase green light duration of an odd cycle), the unit is s; g n,2 It is the duration of the green light of the up-going straight-going phase in an odd-numbered cycle of a Type I intersection or a Type II intersection, and the unit is s;

[0129] It is the green light duration of the downlink left-turn phase of an odd-numbered period at a Type I intersection or Ty...

specific Embodiment approach 3

[0136] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the step seven, when coordinating the left-turn traffic flow at the type I intersection, it is necessary to divide the intersection into different sets;

[0137] For the green wave belt formed between consecutive Type II intersections, it is necessary to divide the intersections into different sets;

[0138] The specific process is:

[0139] The left-turn traffic flow of main road 2 in the downlink and uplink direction I type intersections can be coordinated by the downstream intersection of main road 1 (the next intersection relative to the direction of vehicle travel at the current intersection), which are respectively classified into sets M, (The downlink can be classified into M by the coordinated intersection, and the uplink can be classified by the coordinated intersection into ), the number of elements in the set is and (If the downstream adjacen...

technical field

[0001] The invention relates to a traffic signal coordination control method at an arterial intersection. The utility model belongs to the technical field of urban traffic control. Background technique

[0002] Arterial coordinated control is an important way of urban traffic control. Reasonable arterial coordination can greatly reduce traffic flow delays on arterial roads and improve the traffic efficiency of intersection groups. In the traditional arterial coordinated control method, all intersections have to execute the same cycle length, that is, the common cycle. It is generally applicable to adjacent intersections with relatively close flow rates and geometric structures. The common urban road network structure is generally to arrange several secondary arterial roads or branch roads between two main roads, so that the traffic flow can be reasonably collected and distributed. At this time, there are large differences in the geometric structure and tra...

Examples

specific Embodiment approach 1

[0066] Specific implementation mode 1: In this implementation mode, a method for coordinated control of traffic signals at arterial intersections based on a non-isoperiodic period. The specific process is as follows:

[0067] Step 1: The coordinated control area includes a total of N adjacent signalized intersections, collecting the entrance lane flow of each intersection within a given period of time;

[0068] Step 2: The number of the intersection is 1, 2,...,n...,N; there is I at the intersection n n Phases, numbered 1,2,…,i n ..., I n , calculate the cycle time C when intersection n executes single-point control (control of a single intersection, regardless of the control of other intersections) n , the unit is s; the specific process is:

[0069] Step 21. Calculate the initial period C of the intersection n 0,n , unit s; C 0,n The formula is:

[0070]

[0071] In the formula, L n is the total green light loss time of intersection n (green light time that cannot ...

specific Embodiment approach 2

[0122] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in the step 6, the constraint of constructing the phase combination scheme and the equivalent relationship between the cycle and the phase green light; the specific process is:

[0123]

[0124]

[0125]

[0126]

[0127]

[0128] In the formula: g n,1 It is the duration of the green light for the downlink straight phase of an odd-numbered period at a Type I intersection or Type II intersection (use g when the intersection is Type I n,1 means that when the intersection is class II, g n,1 Indicates the straight-going phase green light duration of an odd cycle), the unit is s; g n,2 It is the duration of the green light of the up-going straight-going phase in an odd-numbered cycle of a Type I intersection or a Type II intersection, and the unit is s;

[0129] It is the green light duration of the downlink left-turn phase of an odd-numbered period at a Type I intersection or Ty...

specific Embodiment approach 3

[0136] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the step seven, when coordinating the left-turn traffic flow at the type I intersection, it is necessary to divide the intersection into different sets;

[0137] For the green wave belt formed between consecutive Type II intersections, it is necessary to divide the intersections into different sets;

[0138] The specific process is:

[0139] The left-turn traffic flow of main road 2 in the downlink and uplink direction I type intersections can be coordinated by the downstream intersection of main road 1 (the next intersection relative to the direction of vehicle travel at the current intersection), which are respectively classified into sets M, (The downlink can be classified into M by the coordinated intersection, and the uplink can be classified by the coordinated intersection into ), the number of elements in the set is and (If the downstream adjacen...

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