Research on Sensory Coordinated Control of Long Distance Single Lane Bidirectional Traffic Interval Based on VisVAP
The mountain area has complex topography and poor construction conditions.In order to ensure the transportation of all kinds of engineering materials and the needs of engineering construction during the construction period,it is necessary to build longdistance construction access roads in the construction area to meet the needs of passenger and cargo transportation.Limited by the terrain conditions,the construction access road in the actual project can only be built as a single lane,but it needs to bear the traffic demand of bidirectional traffic.In order to improve the traffic effi-ciency and safety of longdistance singlelane bidirectional traffic section,combined with the automatic block control principle of train operation,a multi-interval induction coordinated control scheme based on VisVAP is proposed in this paper.According to the specific functional requirements,the induction coils are divided into the interval demand response coil(Knock type),the interval occupation re-sponse coil(Occupy type)and the interval response coil(Pass type).A normal four-phase control scheme for intermediate control interval and a special three-phase control scheme for setting minimum red light time Δt for port control interval are proposed.The VisVAP control flow files of port and inter-mediate control interval are given,the calculation method of minimum red light time Δt limit is put forward,and its reasonable feasibility is proved by simulation.Finally,taking the single-lane two-way traffic section with a length of 2000 m in the construction access road of Dadu River Bridge on Si-chuan-Tibet Railway as the research object,Vissim simulation is carried out.It is found that when the uplink Δt is set to 80 s and the downlink Δt is set to 60 s,the control interval can ensure the mini-mum traffic delay and high traffic flow fluency,which can improve traffic efficiency and ensure traffic safety.
automatic blockingVisVAPmulti interval induction coordinated controlminimum red light time
万方数据
维普
