A real-time lane-divided vehicle delay prediction method based on iqa

Abstract

The invention relates to an IQA-based real-time vehicle delay prediction method for lane division, and belongs to the technical field of intelligent transportation. Based on the lane-divided real-time queuing length prediction method and the traffic wave theory, the present invention constructs the IQA delay polygon, real-time lane-divided to predict vehicle delay; by predicting IQA in advance, it makes up for the difficulty in obtaining real-time data when using IQA for delay calculation in the past The defect effectively improves the accuracy of delay calculation. The key of the present invention is that the vehicle delay information can be obtained in advance according to the lanes, and the passive delay estimation can be changed to the active delay prediction, which is convenient for signal optimization design of associated intersections or congested road sections in advance, so as to alleviate traffic congestion and improve the travel environment. .

Description

technical field [0001] The invention relates to an IQA-based real-time lane-divided vehicle delay prediction method, which belongs to the technical field of intelligent transportation. Background technique [0002] Delay is an important parameter in traffic signal timing optimization and LOS estimation at signalized intersections, but it is also a difficult parameter to estimate. Intersection delays mainly come from parking queues, and a large part of the delay estimation based on queue length in adaptive signal control systems comes from Webster's theory and equations, stochastic queuing theory, queuing vehicle delays and time-dependent delay formulas, such models It is often suitable for delay estimation based on long-term (multi-period) units, which is not conducive to short-term (single-period) delay calculation, and cannot reflect random traffic demand. Based on the above model, the Incremental Queue Accumulation (IQA) delay estimation method is a new delay estimation ...

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Problems solved by technology

Intersection delays mainly come from parking queues, and a large part of the delay estimation based on queue length in adaptive signal control systems comes from Webster's theory and equations, stochastic queuing theory, queuing vehicle delays and time-dependent delay formulas, such models It is often suitable for long-term (multi-period) delay estimation, which is not conducive to short-term (single-period) delay calculation, and cannot respond to random traffic demand

Based on the above model, the Incremental Queue Accumulation (IQA) delay estimation method is a new delay estimation method for signalized intersections adopted in the US traffic capacity manual in 2010. Research shows that the IQA method is theoretically Compared with the traditional delay estimation model, it has stronger robustness and higher accuracy, but the difficulty of field data collection greatly restricts the use of the model

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