Information acquisition release system and method for guiding left-hand turning vehicle to pass through intersection

Abstract

The invention provides an information acquisition release system and a method for guiding a left-hand turning vehicle to pass through an intersection. The system comprises a central control unit, a first sensor, a second sensor and a display device, the central control unit is respectively connected with the first sensor, the second sensor and the display device and used for processing traffic information, the first sensor is located at a T*V distance position of an opposite through lane stop line and used for acquiring entry time point and driving speed of a straight driving vehicle which enters into the intersection, the T represents an absolutely safe vehicle clearance, the V represents a design speed of the road where the vehicles drive, the second sensor is located at a position of the opposite through lane stop line and used for detecting straight driving vehicles which pull out, and the display device is used for displaying opposite through lane vehicle information. By means of the system and the method, suggestion information is provided for the left-hand turning vehicle to determine the left-hand turning, a left-hand turning driver can be aided in determining vehicle clearances of the straight driving vehicles, the traffic capacity of the intersection is improved, and dangerous conflicts between the left-hand turning vehicle and the straight driving vehicles are reduced.

Description

technical field [0001] The invention relates to the technical field of traffic information acquisition and processing, in particular to an information acquisition and release system and method for guiding left-turn vehicles to pass through intersections in road traffic. Background technique [0002] In the signal control method of the existing signalized intersection, when there are no more than 4 left-turning standard vehicles in a certain direction within a signal cycle, the left-turning vehicles in this direction do not set up a left-turning special phase separately, and the left-turning vehicles It shares a phase with the oncoming straight vehicle, and the left-turning vehicle needs to pass through the vehicle gap of the oncoming straight vehicle. Whether the left-turning driver passes depends entirely on the judgment of the vehicle gap, and the accuracy of the judgment directly affects traffic safety. , according to the road traffic regulations in the United States, whe...

AI Technical Summary

Problems solved by technology

[0002] In the signal control method of the existing signalized intersection, when there are no more than 4 left-turning standard vehicles in a certain direction within a signal cycle, the left-turning vehicles in this direction do not set up a left-turning special phase separately, and the left-turning vehicles It shares a phase with the oncoming straight vehicle, and the left-turning vehicle needs to pass through the vehicle gap of the oncoming straight vehicle. Whether the left-turning driver passes depends entirely on the judgment of the vehicle gap, and the accuracy of the judgment directly affects traffic safety. , according to the road traffic regulations in the United States, when the time distance between straight-going vehicles reaches more than 5.5s, it is safe, which is called the intervehicle gap. When the left-turn driver underestimates the real time headway, he will choose to continue waiting The opportunity to pass through is wasted, and the efficiency of intersection traffic is reduced; when the left-turning driver overestimates the real headway, the driver may try to pass through, but the real vehicle gap cannot meet the vehicle passing through, so straight-going vehicles and left-turning are very likely to occur Vehicles collide, and because the direction of travel of the left-turning vehicle and the straight-going vehicle may be perpendicular, the probability of a side collision is greater, and the severity of the side collision accident is high and the injury is large

Especially in the case of poor line-of-sight at intersections, it is more likely to cause incorrect judgments, such as mountainous areas, foggy days, snowy days, etc. will cause poor line-of-sight

According to previous studies, about 30% of the left-turn accidents were caused by the misjudgment of the space that can be inserted into the vehicle (Chovan et al., 1994), and Staplin (1995) and Yan Xuedong (2007) found that the elderly due to poor vision, Slower to react and more prone to misjudgment

In addition, in the left-turn accidents, the accidents with poor sight distance as the main cause accounted for 24.4%. The poor sight distance may also be caused by the opposite left-turning vehicle. Drivers observe oncoming through traffic, especially when the central vacancy at the intersection is too large (Yan and Radwan, 2004and 2007)

Frequent left-turn accidents and high accident severity not only restrict the traffic capacity of the intersection, but also pose a huge challenge to traffic safety, endangering the safety of drivers' lives and property

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