Estimating and Measuring Arterial Travel Time and Delay

Loading...
Thumbnail Image

View/Download File

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Estimating and Measuring Arterial Travel Time and Delay

Published Date

2012-08

Publisher

Intelligent Transportation Systems Institute, Center for Transportation Studies, University of Minnesota

Type

Report

Abstract

To estimate arterial travel time/delay, the key element is to estimate intersection queue length, since travel time, delay, and level of services can be easily derived from queue length information. In this study, we developed a new traffic flow model, named shockwave profile model (SPM), to describe queuing dynamics for congested arterial networks. Taking advantage of the fact that traffic states within a congested link can be simplified as free-flow, saturated, and jammed conditions, the SPM simulates traffic dynamics by analytically deriving the trajectories of four major shockwaves. This model is particularly suitable for simulating congested traffic especially with queue spillover. In the SPM, a novel approach is proposed as part of the SPM, in which queue spillover is treated as either extending a red phase or creating new cycles. Since only the essential features, i.e. queue build-up and dissipation, are considered, the SPM significantly reduces the computational load and improves the numerical efficiency. We further validated the SPM using real-world traffic signal data collected from a major arterial in the Twin Cities. The results clearly demonstrate its effectiveness and accuracy. This model can be applied to estimate arterial travel time and delay and optimize signal timing in real time.

Description

Related to

Replaces

License

Collections

Series/Report Number

Funding information

Department of Civil Engineering, University of Minnesota

Isbn identifier

Doi identifier

Previously Published Citation

Other identifiers

Suggested citation

Liu, Henry X.; Wu, Xinkai. (2012). Estimating and Measuring Arterial Travel Time and Delay. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/135163.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.