EFFECT OF LEFT TURNING VEHICLE ON QUEUE LENGTH & DELAY AT SIGNALIZED INTERSECTION: A CASE STUDY OF VRUNDAVAN CROSS ROAD VADODARA
Keywords:Left turn, Traffic congestion, VISSIM, Conflict, Signal, queue length.
The behaviour of traffic in the heterogeneous environment is complex and difficult to model. Cpmplexity increases many folds at intersection. In India due to heterogeneous traffic condition, traffic problems arise to the road users because different types of vehicle with different characteristics use the same roads. The more traffic signal time will result in bottleneck condition for the traffic hence the queue length and delay time of vehicle is more. Normally left turn vehicle has direct lane but sometime it is creating problems to vehicle from preceding road hence left turning vehicle creates conflict due left hand turning vehicle with merging of vehicle coming from preceding approach (straight movement). So many research works had been done on the left turning traffic like effect of left turn channelization on vehicle waiting time but the research work on vehicle queue length and delay time is less understood specially in mix traffic condition. The aim of this paper is to investigate the effect of left turning vehicles on queue length and delay at signalized intersection under mix traffic condition. The study area selected is Vrundavan intersection and the traffic survey was carried out during the morning time of 8:00 am to 12:00 noon and also for evening time 3:00 pm to 7:00 pm for working day as well as for non-working day. Data analysis is done with the help of VISSIM software. To solve the traffic problem of queue length and vehicle delay time Micro-Simulation Model is the best solution it can study models too complicated for analytical treatment. This paper focus on study of actual traffic condition of signalized intersection at Vrundavan intersection Vadodara and redesign a signal and simulated them using VISSIM Software.