EVALUATION OF LEVEL OF SERVICE AT SIGNALIZED INTERSECTIONS USING MICROSCOPIC SIMULATION TECHNIQUE
Keywords:
Traffic simulation models, VISSIM Software, Delay time, Channelization.Abstract
Mixed traffic in cities of many developing countries is mainly characterized by the lack of lane discipline on the roads. The rapid evolution in the sophistication of micro simulation models has encouraged their use in transportation engineering and planning. Traffic simulation models are useful in analyzing the traffic operations. Traffic simulation models allow visualizing existing and future traffic conditions, test strategies that would be difficult or impossible to test in roadway conditions. The main objective of this study is to evaluate the present condition of the existing intersection. The present study aims to evaluate the present traffic conditions in the study area considered by using the microscopic simulation tool VISSIM. Two signalized intersections namely hindu college junction and chandana bros junction located in the Guntur city of Andhra Pradesh are considered as study area for the present work. The study
area is evaluated based on the present condition of the two junctions and evaluation is done in terms of delay at intersection. The validation of the developed model for both the junctions is made by comparing the delay obtained from the VISSIM model and that from the formula. Improvements are made in the existing intersections in the form of channelization for left moving vehicles for all the directions of two junctions. For the improved condition of intersection, evaluation is done and the delay at intersection is determined for the same. A typical comparison of improved condition of the intersection is made with the existing condition of intersection. The results showed improvement in the delay for both the intersections after channelization over the existing condition. Also, to verify the
hypothesis the Chi-squared test is conducted on the results in terms of delay for both the junctions. From the Chisquared test it is concluded that the improvement for the two junctions in terms of left channelization is accepted and verified.
