Abstract
The studies on headway characteristics of traffic flow in Turkey are mainly dealing with signalized arterials, intersection approaches or roundabouts. Only a few studies can be found on headway characteristics of uninterrupted flow facilities and nearly none of them are on lane by lane basis. In this study, the authors are modeling headways of vehicles at zmir ring roads by lane by lane principle. The study demonstrates that lognormal distribution is an effective tool to define headways. In addition, the applicability of Cowan M3 distribution to time headways is investigated. Proportion of free vehicles is modeled for different lanes. The results show that traffic flow in the middle lane is highly affected by the vehicles in other lanes. Vehicles in the outer lane can be assumed to arrive randomly, but they are also disturbed by vehicles in other lanes. These results can be used in capacity and performance analysis of freeway segments, ramp junctions and weaving areas.
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Yiğiter, Ö.C., Tanyel, S. Lane by lane analysis of vehicle time headways — Case study of Izmir ring roads in Turkey. KSCE J Civ Eng 19, 1498–1508 (2015). https://doi.org/10.1007/s12205-014-0267-y
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DOI: https://doi.org/10.1007/s12205-014-0267-y