Vehicle queuing overflow anticipation method for city bottleneck road section
A bottleneck road section and vehicle technology, applied in the field of road traffic control, can solve problems such as the impossibility of meeting the dynamic layout requirements of the overflow safety distance, and achieve a reasonable and reliable effect of the predictive method
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[0053] The present invention will be further described below in conjunction with the drawings and specific embodiments.
[0054] (1) Setting of bottleneck sections
[0055] Construct bottleneck intersection i and its upstream intersection i+1. Take the two-way four-lane road segment as an example. The intersection uses common four-phase signal control, such as figure 1 As shown, the key traffic value of each phase of the bottleneck intersection i is obtained through the investigation, and the time is allocated.
[0056] (2) Calculation of overflow safety distance
[0057] Assuming that two periods are taken as the transition period of the control scheme conversion, that is, let k=2, then set the initial traffic parameters L, k, L according to the experimentally known conditions eff , C, g values, and traffic parameters q obtained by upstream detector 1 and downstream detector 2 a , Q m , Obtain the overflow safety distance L safe .
[0058] (3) Calculation of shock wave velocity
[005...
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