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Reliability of congestion measures: Stockholm's case
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics (closed 20110301), Traffic and Logistics (closed 20110301).
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics (closed 20110301), Traffic and Logistics (closed 20110301).
2010 (English)In: Proceedings of the Institution of Civil Engineers: Transport, ISSN 0965-092X, E-ISSN 1751-7710, Vol. 163, no 2, 85-91 p.Article in journal (Refereed) Published
Abstract [en]

The Stockholm congestion charging trial was implemented with the aim of satisfying a number of transport policy objectives related to reducing car use in the central area of Stockholm. However, the multifaceted nature of congestion that the charges aimed to alleviate was not technically defined. The traffic impact evaluation efforts were based on survey results for chosen links without any scientific review of the dynamic character of congestion or any investigation of the statistical characteristics of the chosen congestion indicator. Neither was there any analysis of area networks nor any calculation of an overall indicator. Based on a literature review, approaches for defining congestion and a number of alternative congestion performance measures were selected. Data from the trial 'before' and 'after' surveys were used to estimate congestion levels and the accuracy of the performance measures. Specific issues and lessons regarding the quality of the data collection are discussed. Accuracy rankings are presented for different cases, concluding that some performance measures showed better reliability in all situations whereas others proved to always be less reliable. These findings are used as a basis for recommendations regarding the implementations of the congestion indicators studied.

Place, publisher, year, edition, pages
2010. Vol. 163, no 2, 85-91 p.
Keyword [en]
statistical analysis, traffic engineering, transport management
National Category
Transport Systems and Logistics
Research subject
SRA - Transport; SRA - Energy
Identifiers
URN: urn:nbn:se:kth:diva-27899DOI: 10.1680/tran.2010.163.2.85ISI: 000277320500005Scopus ID: 2-s2.0-77953481697OAI: oai:DiVA.org:kth-27899DiVA: diva2:384435
Funder
StandUpTrenOp, Transport Research Environment with Novel Perspectives
Note
QC 20110110Available from: 2011-01-10 Created: 2011-01-03 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Relevance and Reliability of Area-Wide Congestion Performance Measures in Road Networks
Open this publication in new window or tab >>Relevance and Reliability of Area-Wide Congestion Performance Measures in Road Networks
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

For operational and planning purposes it is important to observe, predict and monitor the traffic performance of congested urban road links and networks. This monitoring effort describes the traffic conditions in road networks using congestion performance measures. The objective of this research is to analyse and evaluate methods for measuring congestion and congestion performance measures for monitoring purposes. For this objective, a selection of the required aspects of the performance measures in the literature is considered. The aspects to be considered can be classified into two categories: A first group relates to the statistical aspects of these indicators, i.e. reliability. The second relates to their ability to capture the impacts of congestion, i.e .relevance. The reliability and relevance of the congestion performance measures are evaluated. A recommendation of the most suitable indicator is provided at the end of the study.

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2011. 52 p.
Series
Trita-TEC-PHD, ISSN 1653-4468 ; 11:002
Keyword
Congestion Performance Measures, Reliability, Relevance, Road networks
National Category
Transport Systems and Logistics
Research subject
SRA - Transport
Identifiers
urn:nbn:se:kth:diva-39551 (URN)
Public defence
2011-09-22, E1, Lindstedtsvägen 3, KTH, Stockholm, 13:00 (English)
Opponent
Supervisors
Funder
TrenOp, Transport Research Environment with Novel Perspectives
Note
QC 20110912Available from: 2011-09-12 Created: 2011-09-12 Last updated: 2012-06-12Bibliographically approved

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