Research on traffic organisation to prohibit left turn at signalised intersections in Hanoi

Abstract

The research was conducted to simulate and evaluate the solution of organising traffic to prohibit left turns at signalised intersections in Hanoi. In this study, PTV Vissim was used to simulate different distances from the U-turn position to the center of the intersection for each traffic approach with different number of lanes in one direction. The methodology includes field data collection, scenario development, model calibration, and comparative analysis of traffic performance indicators such as average travel time. Traffic volume and turning movement data were collected using manual survey and used as input for model validation to reflect real-world traffic conditions. Three case studies were selected to represent intersections with two to five lanes per direction per approach. The results show that the left turn movement should be organised by the left turn prohibition measure based on the traffic volume through the intersection in each direction. Additionally, the most suitable U-turn organisation location was determined based on comparing the average travel time of vehicles.