Determination and Comparison of PCU on Urban Roads under Mixed Traffic Conditions—A Case Study

In developing countries like India, there is no lane discipline and most of the roads and highways consist of heterogeneous traffic. The estimation of heterogeneous traffic flow characteristics is complex in traffic stream consisting of mixed vehicles with varying dynamic characteristics which tend to share the same space of the road without much speed control and lane discipline. Passenger car unit (PCU) or passenger car equivalent (PCE) is a metric used for expressing road or highway capacity. They exhibit dynamic nature based on various factors like vehicle characteristics, roadway characteristics, etc. In the present paper, dynamic nature of passenger car unit (PCU) values are analyzed under heterogeneous traffic conditions on two-lane urban roads in six unique locations of Andhra Pradesh State, India. The estimation of PCU values are based on speed and vehicle’s projected area on the ground. Speed equations are developed to estimate the speed of vehicles for given traffic volume and composition. Later the acquired PCU values are compared with Indian Road Congress (IRC)—106:1990 recommended values. In addition, effect of carriageway width on PCU factors of each category of vehicle and variations in the PCU factors due to change in traffic volume and composition is demonstrated.


  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 628-638
  • Monograph Title: Urbanization Challenges in Emerging Economies: Energy and Water Infrastructure; Transportation Infrastructure; and Planning and Financing

Subject/Index Terms

Filing Info

  • Accession Number: 01700660
  • Record Type: Publication
  • ISBN: 9780784482025
  • Files: TRIS, ASCE
  • Created Date: Feb 23 2019 3:03PM