Saturated time headway detection method based on radar data

Abstract

The invention relates to application of a radar detection technology, in particular to a saturated time headway detection method based on radar data. The method comprises the following steps of: the step 5, establishing a radar traffic big data platform, and carrying out acquisition, analysis, data storage and analysis of configuration information and vehicle passing data on radar accessed by a radar upper computer; the step 6, inquiring all vehicle passing data in a lane: inquiring all vehicle passing data of the lane in the releasing time period according to the lane releasing time obtainedin the step 5, and selecting time periods of which the data volume of all passing vehicles is greater than M; and the step 7, obtaining a saturated time headway in the lane passing time: starting fromthe Nth vehicle passing data of the positive sequence of the time when the vehicle is driven out of a coil, subtracting the time when the front vehicle drives out of the coil from the time when the rear vehicle drives out of the coil to obtain the time headway of the Nth vehicle from the release of the lane, removing the time headway greater than Q seconds, and taking the minimum value of the remaining time headway as the saturated time headway of the lane within the passing time period.

Description

technical field [0001] The invention relates to the application of radar detection technology, in particular to a saturated headway detection method based on radar data. Background technique [0002] Intersections are flow conversion nodes of urban roads and play a vital role in the connection of road network systems. The ability of intersections to guide traffic flow largely determines or restricts the overall operation of urban road networks. Adding signal management facilities to urban road intersections can adjust the traffic flow at the intersections in time and space, but unreasonable signal management may also cause a high incidence of traffic congestion. How to reduce vehicle delays at signalized intersections and improve intersection capacity is the goal pursued by urban road traffic research and management. The headway time refers to the time interval between the front ends of two consecutive vehicles passing through a certain section in the vehicle queue driving ...

AI Technical Summary

Problems solved by technology

[0005] However, manual calculation is time-consuming and labor-intensive and the accuracy is low. A loop coil vehicle detector can only detect one lane, and it needs to be buried below the ground during installation. The construction is difficult, which will cause damage to the road surface and cause failure of a certain lane. use, the service life of the road will also be reduced

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