A spatiotemporal resource allocation method for paired intersections influenced by short left-turn lanes

A technology of space-time resources and allocation methods, which is applied in the direction of road vehicle traffic control systems, traffic control systems, instruments, etc.

Active Publication Date: 2017-08-01
DALIAN UNIV OF TECH
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  • Claims
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Problems solved by technology

In this case, how to rationally allocate the space-time resources of pairs of intersections is related to the performance of traffic flow and the efficiency of intersections, but there are few studies on this aspect

Method used

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  • A spatiotemporal resource allocation method for paired intersections influenced by short left-turn lanes
  • A spatiotemporal resource allocation method for paired intersections influenced by short left-turn lanes
  • A spatiotemporal resource allocation method for paired intersections influenced by short left-turn lanes

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Embodiment Construction

[0086] 1. Obtain traffic flow data

[0087] Pay attention to the setting of left-turn short lanes on shared road sections, consider Figure 10 The paired intersections shown. Calibrate the saturated flow rate of each entrance lane at each intersection based on traffic survey or practical experience. Here, it is assumed that the saturated flow rate of the left-turn lane and the right-hand lane are both 1810pcu / h, and the saturated flow rate of the straight lane is 1850pcu / h.

[0088] Assuming that the traffic flow composition is 100% cars, the traffic demand data in a typical time period is obtained according to the traffic survey, that is, the hourly flow rate and peak 15-min flow rate of each intersection, each entrance, and each turn, as shown in Table 1. According to the distribution of traffic flow at each intersection, it is assumed that the signal phase schemes of intersection A and intersection B are as follows: Figure 11 and Figure 12 shown.

[0089] Table 1 The ...

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Abstract

A paired intersection time-space resource allocation method affected by a turning-to-left short lane is suitable for designing a paired intersection signal control solution without or without the turning-to-left short lane. According to a traffic flow theory and operational research, short lane length and phase-effective green-lamp time length are used as decision variables, and a fact of equal periodical time length is used as a constraint condition, thereby establishing a paired intersection time-space resource allocation module and obtaining an optimal combination among the short lane length of each intersection, the periodical time length and a green ratio. The solving algorithm of the optimization module is programmed by means of MATLAB software. By means of traffic simulation software, a coordination signal control green time difference optimization method is presented, thereby obtaining an optimal controller green time difference. Traffic flow data and VISSIM software are used for verifying the new model and the new method. The verification results show that the new model and the new method have advantages of improving traffic flow operation performance through reasonably configuring the time-space resource of the paired intersection, reducing number of vehicle delay times and stopping times, and reducing intersection saturation. The paired intersection time-space resource allocation method affected by the turning-to-left short lane can be widely used for designing paired intersection signal timing solutions.

Description

technical field [0001] The invention belongs to the field of intelligent traffic control, and relates to a paired intersection widening section design and signal timing optimization method suitable for short lanes with (without) left turns. Background technique [0002] At present, there are frequent traffic congestion problems in major and medium-sized cities, the social and economic development of the cities are severely restricted, and people's travel and life are also greatly affected. When the left-turning traffic volume is large, the intersection conflict between straight-going and left-turning traffic cannot be ignored. This conflict not only reduces the capacity of the straight-going traffic flow and the left-turning traffic flow, but also threatens the operation safety of both. In order to separate the conflict between the left-turning traffic flow and the straight-going traffic flow, the left-turning phase protection is often designed. In this case, a dedicated le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/081
CPCG08G1/081
Inventor 姚荣涵张晓彤廉莲钟绍鹏
Owner DALIAN UNIV OF TECH
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