Road network traffic operation condition evaluation method based on road section weight coefficient
A technology of weight coefficients and operating conditions, which is applied in the traffic control system of road vehicles, traffic flow detection, traffic control systems, etc., can solve problems such as ambiguity in physical meaning, lack of detailed analysis of the composition of weight coefficients in road sections, and unclear calculation methods , to achieve the effect of a simple evaluation method
Active Publication Date: 2020-04-28
SOUTH CHINA UNIV OF TECH
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[0004] However, the existing evaluation indicators and calculation methods for traffic operation conditions are mainly only applicable to urban roads, such as expressways, trunk roads, secondary roads and branch roads, and the calculation methods for the evaluation indicators of urban road network traffic conditions are not yet available. It is clear that it is necessary to scientifically measure the impact of the operating conditions of each road segment on the entire road network
Although some scholars have proposed to use the weight coefficient of the road section to weight the evaluation index of road network traffic operation status, but the composition of the weight coefficient of the road section is not carefully analyzed, usually only considering the traffic flow of the road section or the length of the road section, the physical meaning of the calculation results not clear
The existing technology considers the weight of the road section, but only considers the flow (Liao Ruihui, Zhou Jing, Xu Hongli. Research on urban traffic road network congestion index considering the weight of the road section [J]. System Science Journal, 2016, 24(01): 84- 88.), or only considering vehicle speed and road section length (Zhou Qiang, Yan Xinxin, Yuan Zhenzhou. Calculation of average load degree of urban road network considering road grade and congestion penalty[J]. Highway and Automobile Transport, 2017(01):33-36 .), neither can fully reflect the weight of road sections in the road network
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[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0035] Such as figure 2 As shown, in this embodiment, 6 roads (A 1 、A 2 ,...,A 6 ) a total of 24 sections (L 1 , L 2 ,...,L 24 ) to evaluate the traffic operation status of the road network, figure 1 It is a road network traffic operation status evaluation method based on the road section weight coefficient provided by this embodiment, and the specific steps are as follows:
[0036] Step 1. Obtain the length, traffic flow, unimpeded driving speed and travel speed of each vehicle of each road section in the road network.
[0037] Use vehicle detectors, floating cars and other detection devices to obtain the length l of each road section in the road network 1 , l 2 ,...,l 24 , traffic flow q 1 ,q 2 ,...,q 24 , the unblocked driving speed v f1 , v f2 ,...,v f24 And the av...
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The invention discloses a road network traffic operation condition evaluation method based on a road section weight coefficient. The method comprises the following steps: S1, acquiring data such as alength of each road section and a travel speed of each vehicle in a road network; S2, obtaining a road section traffic jam index according to average travel time and non-blocking driving time; S3, obtaining a weight coefficient of each road section in the road network according to the traffic flow and the non-blocking driving time; S4, obtaining a road network average congestion index by using a road section traffic congestion index and the road section weight coefficient; S5, obtaining an average non-blocking driving speed of the road network by utilizing the non-blocking driving speed of theroad section and the weight coefficient of the road section; and S6, according to the road network average non-blocking driving speed and the road network average congestion index, obtaining a road network average travel speed. According to the method, a weight size of a traffic operation condition of each road section in the whole road network is quantified, the traffic state of the current roadnetwork can be judged more scientifically and reasonably, and a traffic congestion condition of the current road network can be known conveniently.
Description
technical field [0001] The invention relates to the technical field of traffic evaluation, in particular to a road network traffic operation status evaluation method based on road section weight coefficients. Background technique [0002] In order to make a reasonable, reliable, quantitative and intuitive evaluation of the traffic operation status of the urban road network, grasp the overall status and congestion level of the urban road network traffic operation, and provide scientific basis for the operation management, traffic control, and later planning of the urban road network, It is urgent to establish a set of scientific and reasonable evaluation indicators for urban road network traffic operation status. [0003] In recent years, the state and local governments have successively formulated norms and standards for the evaluation of urban traffic performance. Among them, the traffic performance index (Traffic Performance Index, TPI), also known as the traffic congestio...
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IPC IPC(8): G08G1/01G08G1/052G08G1/065
CPCG08G1/0125G08G1/0133G08G1/0137G08G1/052G08G1/065
Inventor 卢凯吴蔚田鑫汪丽林永杰
Owner SOUTH CHINA UNIV OF TECH
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