Modelling and Simulation of Vehicle-Pedestrian Interactions on Urban Roads in Disordered Traffic

The disorderliness in vehicular traffic and non-compliant pedestrian behaviour at undesignated pedestrian crossings in developing economies create complex vehicle-pedestrian interactions which in turn influence vehicle operating speeds and road capacity. Simulating vehicle-pedestrian interaction remains as a less explored research topic in disordered traffic. Therefore, different from earlier studies on simulating vehicles or pedestrians separately, this study aims to develop a microscopic simulation model for understanding vehicular and pedestrian behaviour on urban roads at undesignated pedestrian crossings. GIPPS model and Social Force Model are used to simulate the vehicles and pedestrians, respectively. To explain the approaching vehicle’s influence on pedestrian, vehicle-pedestrian interaction force is added to the Social Force Model. If a pedestrian negotiates the gap between two vehicles successfully, pedestrian information is added to the GIPPS model. A simple gap-acceptance criterion considering pedestrian’s crossing time and approaching vehicle’s passing time is used for pedestrian decision-making process. The unique pedestrian crossing patterns (e.g. perpendicular and oblique patterns) observed in disordered traffic are also introduced. The model is calibrated and validated using the data collected from an Indian city. The validated model is applied to assess the impact of pedestrians on capacity by varying pedestrian volume and vehicular composition. The results indicate that irrespective of vehicular composition, the percentage reduction in capacity increases with increase in pedestrian volume. This study finds interesting implications in developing standards for capacity estimation in the presence of undesignated pedestrian crossings, and also, to determine surrogate safety measures (e.g. time-to-collision) for urban roads.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: 20p

Subject/Index Terms

Filing Info

  • Accession Number: 01764112
  • Record Type: Publication
  • Report/Paper Numbers: TRBAM-21-02541
  • Files: TRIS, TRB, ATRI
  • Created Date: Dec 23 2020 11:20AM