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Improvement of the volume-delay function by incorporating the impact of trucks on traffic flow

Müller, Stephan and Schiller, Christian (2015) Improvement of the volume-delay function by incorporating the impact of trucks on traffic flow. Transportation Planning and Technology, 38 (8), pp. 878-888. Taylor & Francis. doi: 10.1080/03081060.2015.1079388. ISSN 0308-1060.

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Official URL: http://dx.doi.org/10.1080/03081060.2015.1079388


In current transportation modelling, travel time is the most important factor in decisions regarding transport modes, destinations and routes. The calculation of travel time is deployed by volume-delay functions (VDFs), a sub-model of route assignment procedure, using the correlation between increasing numbers of vehicles on a road and the road's restrictive capacity. By investigating existing VDFs, a clear gap is seen, demonstrating that current functions are not suited to reflect the empirically known large impact of trucks on passenger car travel times. This issue becomes crucial when transport models are used to reflect future scenarios where goods transportation is expected to increase greatly, and when transport models combine passenger and commercial traffic. This paper presents a new VDF which successfully includes trucks’ impact on traffic flow in the case of Germany and, with slight deviations, for North America. The function is developed using ideal-type data for German motorways. The differences between German and US data and their implications for VDFs are also discussed.

Item URL in elib:https://elib.dlr.de/99865/
Document Type:Article
Title:Improvement of the volume-delay function by incorporating the impact of trucks on traffic flow
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schiller, ChristianTU DresdenUNSPECIFIED
Date:16 April 2015
Journal or Publication Title:Transportation Planning and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 878-888
Publisher:Taylor & Francis
Keywords:Transportation modelling; volume-delay function; correlation function; volume-delay modelling; truck impact; Germany; North America
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Transport System
DLR - Research area:Transport
DLR - Program:V VS - Verkehrssystem
DLR - Research theme (Project):V - Verkehrsentwicklung und Umwelt II (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Transport Research > Commercial Transport
Deposited By: Müller, Dr.-Ing. Stephan
Deposited On:01 Dec 2015 13:29
Last Modified:06 Sep 2019 15:19

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