Reliability of congestion measures: Stockholm's case
2010 (English)In: Proceedings of the Institution of Civil Engineers: Transport, ISSN 0965-092X, Vol. 163, no 2, 85-91 p.Article in journal (Refereed) Published
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.
statistical analysis, traffic engineering, transport management
Transport Systems and Logistics
Research subject SRA - Transport; SRA - Energy
IdentifiersURN: urn:nbn:se:kth:diva-27899DOI: 10.1680/tran.2010.163.2.85ISI: 000277320500005ScopusID: 2-s2.0-77953481697OAI: oai:DiVA.org:kth-27899DiVA: diva2:384435
FunderStandUpTrenOp, Transport Research Environment with Novel Perspectives
QC 201101102011-01-102011-01-032012-03-19Bibliographically approved