Abstract
Composition of traffic flow is one of the most important factors which affect operations at intersections. The effect of different vehicle types in a flow may be reflected by using passenger car equivalence (PCE) values. In this study, it is intended to determine the effect of heavy vehicles, particularly buses that are the most observed heavy vehicle type in urban traffic, on traffic circles. Data of the study are obtained from five different traffic circles in Izmir. The results show that when calculating the heavy vehicle adjustment factor (fHV), different PCE values should be used for minor and major flows. Using the same PCE value for both kind of flows may lead engineers to overdesign or make inadequate designs. Furthermore, it was determined that the effect of heavy vehicles on the major flow was greater when the mean speed of the major flow was low.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
