Traffic signal coordination control method of trunk line intersections based on unequal periods

Abstract

The invention discloses a traffic signal coordination control method of trunk line intersections based on unequal periods, and relates to a traffic signal coordination control method. The invention aims to solve the problems that the existing green wave width is limited, the utilization rate of a coordinated phase green light is low and the parking frequency of a motor vehicle is high. The processis as follows: collecting inlet roadway flow of each intersection; calculating the period duration of executing single-point control; dividing the intersections into a first type and a second type; determining a value interval of a public period; defining trunk line system parameters; constructing the constraint of a phase combination scheme and an equivalent relation between the period and the phase green light; dividing intersections into different sets; determining the starting time and ending time of the green light; determining the departure time of the head vehicle and the tail vehicleof a coordinated vehicle flow; calculating three types of green wave bandwidths; constructing green wave band constraint conditions formed by a trunk line when the trunk line straight phases of the first type of intersections are not adjacent and adjacent to the left turn of an intersecting road; determining an objective function; and determining signal timing parameters of each intersection. Theinvention 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 with (If the downstream adjace...

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 with (If the downstream adjace...

Images