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The role of volume-delay functions in forecasting and evaluating congestion charging schemes: the Stockholm case
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Transport and Location Analysis. KTH, School of Architecture and the Built Environment (ABE), Centres, Centre for Transport Studies, CTS.ORCID iD: 0000-0002-4531-8659
WSP Analys & Strategi.
2015 (English)In: Transportation planning and technology (Print), ISSN 0308-1060, E-ISSN 1029-0354, Vol. 38, no 6, 684-707 p.Article in journal (Refereed) Published
Abstract [en]

Abstract

This paper uses observations from before and during the Stockkholm congestion charging trial in order to validate and improve a transportation model for Stockholm. The model overestimates the impact of the charges on traffic volumes while at the same time it substantially underestimates the impact on travel times. These forecast errors lead to considerable underestimation of economic benefits which are dominated by travel time savings. The source of error lies in the static assignment that is used in the model. Making the volume-delay functions (VDFs) steeper only marginally improves the quality of forecast but strongly impacts the result of benefit calculations. We therefore conclude that the dynamic assignment is crucial for an informed decision on introducing measures aimed at relieving congestion. However, in the absence of such a calibrated dynamic model for a city, we recommend that at least a sensitivity analysis with respect to the slope of VDFs is performed.

Place, publisher, year, edition, pages
Routledge, 2015. Vol. 38, no 6, 684-707 p.
Keyword [en]
congestion charging; transport model; volume-delay functions; cost-benefit analysis; Stockholm
National Category
Transport Systems and Logistics
Identifiers
URN: urn:nbn:se:kth:diva-71700DOI: 10.1080/03081060.2015.1048948ISI: 000359699600006Scopus ID: 2-s2.0-84938421005OAI: oai:DiVA.org:kth-71700DiVA: diva2:486907
Funder
Swedish Transport Administration
Note

TSC import 496 2012-01-30. QC 20170206

Available from: 2012-01-31 Created: 2012-01-31 Last updated: 2017-12-08Bibliographically approved

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Engelson, Leonid

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
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  • asciidoc
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