ABSTRACT

The present study focuses on modeling roundabout in heterogeneous condition and understanding the effect of change in two-wheeler composition on the entry capacity using microscopic simulation technique. A four-legged roundabout of 25m diameter, located in the city of Chandigarh, India was considered as the study area. As Indian traffic flow is highly heterogeneous due to the presence of vehicles with varying physical and operational characteristics, each vehicle modelled separately in PTV VISSIM. Model calibrations were performed using speed distributions, conflict areas, priority rules, and driving behavior parameters. Comparison with the field data obtained from the study roundabout (indicates the applicability of the developed simulation model in assessing the hypothetical scenarios. Study results indicate that the PCU values remain steady under varying compositions of two-wheelers in the traffic stream. In addition, the effect of two-wheeler proportion on roundabout capacity is insignificant in the study area. 

摘要

本研究的重点是模拟异质条件下的环形交叉路口，并使用微观模拟技术了解两轮车组成变化对进入能力的影响。位于印度昌迪加尔市的一个直径为 25m 的四足环岛被认为是研究区域。由于存在具有不同物理和操作特性的车辆，印度的交通流量高度异构，因此每辆车在 PTV VISSIM 中单独建模。使用速度分布、冲突区域、优先规则和驾驶行为参数进行模型校准。与从研究环岛获得的现场数据进行比较（表明所开发的模拟模型在评估假设情景中的适用性。研究结果表明，在交通流中两轮车的不同组成下，PCU 值保持稳定。此外，研究区两轮车比例对环岛通行能力的影响不显着。