Implementation of Arterial Bottleneck Characterization Methods in Virginia

Report No: 21-R9

Published in 2020

About the report:

In 2019, the Virginia Transportation Research Council (VTRC) published Improving the Identification and Characterization of Arterial Congestion Bottlenecks by Zhao and Venkatanarayana.  The report described a study recommending that the Virginia Department of Transportation and the Office of Intermodal Planning and Investment pursue development of data conflation and bottleneck ranking tools and explore the implementation of the arterial bottleneck identification methods in rural areas and for before-after studies. 

The current study was initiated in January 2019 to implement the two recommendations of the original study.  The study consisted of two phases.  In Phase 1, VTRC researchers adapted and applied the previously developed method to select intersections in the Culpeper District.  Based on the promising results and validation feedback from field experts, Phase 2 was initiated to explore the possibility of developing a conflation tool and to adapt further and apply the bottleneck algorithm and visualizations to all signalized intersections in Virginia.  Between February and July2020, the VTRC research team collaborated with a research team from Old Dominion University to develop new methods and scripts to conflate statewide INRIX XD, annual average daily traffic, posted speed limit, and signalized intersection data wherever they were available. These conflation results were then used by the VTRC research team to analyze arterial bottlenecks across the state. Project stakeholders deemed the statewide bottleneck ranking and before-after study results to be reasonable and useful.  The stakeholders are highly interested in further adapting and using the developed methods and scripts for project prioritization, for monitoring of the operational performance of intersections, and to make decisions in the field.  The methods, results, and conclusions from these two implementation efforts (the Culpeper District and statewide) are documented in this report.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

Ramkumar Venkatanarayana, Ph.D., P.E

Last updated: November 9, 2023

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