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Front. Built Environ. | doi: 10.3389/fbuil.2019.00068

The Passenger Car Equivalent Factors For Heavy Vehicles On Turbo Roundabouts

  • 1Silesian University of Technology, Poland

The presence of heavy and slower vehicles within the traffic stream significantly reduces traffic capacity. This reduction increases with the higher participation of heavy vehicles in the stream, which, compared to passenger cars, move at a lower speed. Furthermore, they occupy more space on the road, are characterized by a longer reaction time to the road traffic situations, and put greater pressure on the surface structure, etc. In order to conduct analyses related to determination of the conditions in the traffic stream, the traffic stream mixed in terms of composition is converted from real vehicles into passenger car equivalents. For this purpose, the passenger car equivalent factors (Ei) appropriate for a given group of vehicles are used. The paper presents the results of a study aimed to determine the numerical values of passenger car equivalent factors for heavy vehicles (trucks, buses, trucks with trailers, articulated buses) on turbo roundabouts. The research was carried out on turbo roundabouts located in Poland.

Keywords: Turbo roundabouts, passenger car equivalent factor, Heavy vehicles, homogeneous traffic stream, Road traffic engineering

Received: 27 Feb 2019; Accepted: 07 May 2019.

Edited by:

Sakdirat Kaewunruen, University of Birmingham, United Kingdom

Reviewed by:

Marco Guerrieri, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Italy
Susilawati Susilawati, Monash University Malaysia, Malaysia  

Copyright: © 2019 Macioszek. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Prof. Elżbieta Macioszek, Silesian University of Technology, Gliwice, Poland,