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A study on factors affecting the relationship between congestion impacts and congestion performance measures in area-road networks
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Traffic and Logistics.
2012 (English)Conference paper (Refereed)
Abstract [en]

Congestion performance measures (CPMs) are a key part of decision making. There are several aspects they have to fulfill in order to be useful tools for performance based planning. The relevance aspect corresponds to the capacity of a CPM to capture the impacts of congestion. Previous studies have identified factors that can impact the relevance of the indicators. Additionally, current congestion performance measures use the output of long term planning models. This made the indicators insensitive to the dynamics of congestion. Current improvements in traffic information and data availability have not been followed by corresponding evaluations of how congestion indicators describe the impacts of congestion. The present study is devoted to analyzing these factors with a special focus on factors influencing pollutant emissions. The car fleet composition has significant influenced when comparing areas with different car fleet compositions, hence it was not possible to identify the indicator that performed best. When the car fleet compositions between two areas are similar, the indicators that provided higher relevance were Relative Speed Reduction (Weighted Average) and Excess Delay. The percentage of heavy vehicles does not influence the capabilities of capturing the impacts of congestion. A discussion about how relevant aspects act together with other desired aspects for CPMs is presented. Recommendations for practitioners are presented at the end of the document.

Place, publisher, year, edition, pages
Washington: TRB , 2012.
Keyword [en]
Congestion Performance measures, Road Network, Microsimulation, Emissions
National Category
Transport Systems and Logistics
URN: urn:nbn:se:kth:diva-39685OAI: diva2:440387
TRB 2012
QC 20110913Available from: 2011-09-13 Created: 2011-09-12 Last updated: 2011-09-13Bibliographically 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.
Trita-TEC-PHD, ISSN 1653-4468 ; 11:002
Congestion Performance Measures, Reliability, Relevance, Road networks
National Category
Transport Systems and Logistics
Research subject
SRA - Transport
urn:nbn:se:kth:diva-39551 (URN)
Public defence
2011-09-22, E1, Lindstedtsvägen 3, KTH, Stockholm, 13:00 (English)
TrenOp, Transport Research Environment with Novel Perspectives
QC 20110912Available from: 2011-09-12 Created: 2011-09-12 Last updated: 2012-06-12Bibliographically approved

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