Optimal Freeway Ramp Control without Origin-Destination Information

Loading...
Thumbnail Image

Persistent link to this item

Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Optimal Freeway Ramp Control without Origin-Destination Information

Published Date

2004

Publisher

Elsevier

Type

Article

Abstract

This paper develops an analytical framework for ramp metering, under which various ramp control strategies can be viewed as ramifications of the same most-efficient control logic with different threshold values, control methods, and equity considerations. The most-efficient control logic only meters the entrance ramps nearest critical freeway mainline sections so as to eliminate freeway internal queues, which is derived from a new formulation of the optimal ramp control problem. Instead of assuming the availability of real-time origin-destination information, the new formulation takes advantages of the stability and predictability of off-ramp exit percentages. Those properties of the off-ramp exit percentages are supported by empirical data, and allow us to formulate the optimal ramp control problem as a linear program whose input variables are all directly measurable by detectors in real-time. The solution is also tested on a real-world freeway section in a microscopic traffic simulator for demonstration. Time-dependent origin/destination tables and off-ramp exit percentages are compared as two alternative ways to represent the true real-time demand patterns that are important to freeway ramp metering.

Description

Related to

Replaces

License

Series/Report Number

Funding information

Minnesota Department of Transportation

Isbn identifier

Doi identifier

http://dx.doi.org/doi:10.1016/j.trb.2003.11.003

Previously Published Citation

Zhang, Lei and David Levinson (2004b) Optimal Freeway Ramp Control without Origin-Destination Information. Transportation Research part B 38(10) 869-887.

Suggested citation

Zhang, Lei; Levinson, David M. (2004). Optimal Freeway Ramp Control without Origin-Destination Information. Retrieved from the University Digital Conservancy, http://dx.doi.org/doi:10.1016/j.trb.2003.11.003.

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.