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Effects of desired speeds for queuing and delay on single-lane road segments
Transport Analysis, Stockholm, Sweden.
Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden. (Trafikanalys och logistik)
Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden.
Linköping University, Department of Science and Technology, Communications and Transport Systems. Linköping University, Faculty of Science & Engineering. Swedish National Road and Transport Research Institute (VTI), Linköping, Sweden. (Trafiksystem)ORCID iD: 0000-0002-0336-6943
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2015 (English)In: Transportmetrica A: Transport Science, ISSN 2324-9935, Vol. 11, no 8, 716-728 p.Article in journal (Refereed) Published
Abstract [en]

To improve road safety on parts of the road network carrying low traffic volumes, road designs are proposed including single-lane road segments and periodic overtaking lanes. These roads have been proven to contribute to substantial benefits in terms of road safety. However, overtaking of slower vehicles is only possible on segments including an overtaking lane and not on the single-lane road segments. Driver and vehicle heterogeneity resulting in differences in desired speeds are consequently decisive for the traffic performance. Sufficient quality of service is relying on an appropriate design and distribution of single-lane segments and overtaking lanes. In this paper, we study the effect of the desired speed distribution on traffic performance on single-lane road segments. Expressions are derived for the travel time, delay and percent time spent following. The derived expressions link the desired speed distribution, the single-lane segment length and the traffic flow to the resulting traffic performance. The results are verified through comparison with measures based on microscopic traffic simulation. The conclusion is that there is a good agreement between derived measures and simulation results. The derived measures should therefore not only be of theoretical interest, but also of practical use to estimate traffic performance on single-lane road segments.

Place, publisher, year, edition, pages
TAYLOR & FRANCIS LTD , 2015. Vol. 11, no 8, 716-728 p.
National Category
Transport Systems and Logistics
Identifiers
URN: urn:nbn:se:liu:diva-120782DOI: 10.1080/23249935.2015.1066462ISI: 000360555900004OAI: oai:DiVA.org:liu-120782DiVA: diva2:848418
Conference
2015/08/24
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Available from: 2015-08-25 Created: 2015-08-25 Last updated: 2017-12-04

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Olstam, JohanTapani, Andreas

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