Identification and screening method for frequently congested road sections
A road section and screening technology, which is applied to the traffic control system of road vehicles, traffic flow detection, instruments, etc., can solve the problems of short congestion time, difficult identification and screening, and low reliability.
Active Publication Date: 2019-02-19
BEIJING JIAOTONG UNIV
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Problems solved by technology
[0006] The current identification method of frequently congested road sections only considers the congestion during peak hours, and cannot identify the overall congestion level of the road section every day, and does not consider the volatility of congestion
Due to the differences and fluctuations in the congestion duration of road sections, it is difficult to identify and screen frequently congested road sections with short congestion time and low reliability in the existing technology
Method used
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[0062] figure 1 For the processing flow chart of the identification and screening method of frequently congested road sections provided by the embodiment of the present invention, refer to figure 1 , a method for identifying and screening frequently congested road sections, comprising:
[0063] S10 obtains historical congestion data and counts the accumulated congestion time of a road section every day.
[0064] Calculated according to the following formula:
[0065]
[0066] Among them, β i is the accumulated congestion time of section i in one day, α i，j Indicates whether road segment i is congested at time j·Δ, j=1, 2, ..., M, M represents the number of cycles in the comparison period, and Δ represents the sampling interval of data.
[0067] Schematically, the traffic state includes three types: smooth, slow and congested. Calculate the cumulative congestion time of each road segment per day. If the sampling interval is 5 minutes, there are 288 sampling periods in ...
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The invention provides an identification and screening method of frequently congested road sections. The method comprising the following steps of: acquiring a historical congestion data, counting thecumulative congestion time duration of a certain road section, determining a probability distribution of the obeyed cumulative congestion time duration of the road section, calculating the reliabilityof the cumulative congestion time duration of the road section, and judging that the road section is a frequently congested road section when the reliability exceeds a set threshold epsilon 1; and under the condition of a given reliability, calculating the cumulative congestion time duration of a given reliability of the road section according to the probability distribution obeyed to the cumulative congestion time duration of the road section, and judging that the road section is a frequently congested road section when the cumulative congestion time of duration a given reliability exceeds the set threshold epsilon 2. According to the identification and screening method of frequently congested road sections, determining whether to be a congested road section by calculating the reliability of the road section accumulated congestion beyond the expected threshold T0 or calculating the cumulative congestion time for a given reliability, and an accurate and powerful scientific basis is provided for the traffic management department to screen the congested road sections.
Description
technical field [0001] The invention relates to the technical field of traffic information processing, in particular to a method for identifying and screening frequently congested road sections. Background technique [0002] Traffic congestion is a problem that major cities are facing, mainly including occasional congestion and regular congestion. Occasional congestion is caused by unexpected events, and frequent congestion is usually caused by uneven traffic supply and demand, defects in the road network, and other reasons. For example, traffic planning is not coordinated with urban development, interchange ramps are designed with insufficient capacity, the number of lanes at the junction of high-grade roads and low-grade roads is reduced, the distance between intersections is too large, U-turn settings are unreasonable, and the timing of intersection signal lights is not good. Identify and screen frequently congested sections of the road network. On the one hand, it can p...
Claims
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Login to View More IPC IPC(8): G08G1/01
CPCG08G1/0104G08G1/0129G08G1/0137
Inventor 高自友杨珍珍
Owner BEIJING JIAOTONG UNIV