EVALUATION OF RAMP METER EFFECTIVENESS FOR WISCONSIN FREEWAYS, A MILWAUKEE CASE STUDY: PART 1, DIVERSION AND SIMULATION

The purpose of the research is to determine the benefits of ramp meters in the Milwaukee area freeway system, to determine underlying relationships that permit evaluation of new ramp meters or ramp meter systems elsewhere, and to develop a coherent framework for performing evaluation of ramp meter effectiveness on a whole system. Part 1 concentrates on diversion and traffic simulation. In order to assure that the conclusions are relevant to Wisconsin drivers and conditions on Wisconsin freeways, the research focused on data collected from the US 45 corridor, mostly in Milwaukee County, from before and after the deployment of seven new ramp meters in the southbound direction in early March 2000. This corridor spanned about 15 miles and included the freeway itself and two parallel arterials. Statistically significant diversions away from US 45 occurred at times and places where traffic volumes were heaviest and ramp queues were longest. The data also revealed that there was diversion between on-ramps along US 45 in response to queuing at ramps. The data did not reveal any temporal diversions due to the meters. This study investigated three types of simulation software packages: microscopic (Paramics), mesoscopic (Dynasmart-P) and macroscopic (QRS II). US 45 was simulated with two packages (Paramics and QRS II) within which a reasonable representation of a meter could be achieved. The most convincing simulations of US 45 (without parallel arterials) were created with Paramics. There were two simulations, one for the "before" and one for the "after" period, both of which matched mainline speeds closely and behaved realistically at the meters.

  • Record URL:
  • Supplemental Notes:
    • Part 1 and Part 2 of this report are published in a combined document with a combined executive summary (total of 304 pages). Each part is entered separately in TRIS as there are different authors and abstracts.
  • Corporate Authors:

    University of Wisconsin, Milwaukee

    P.O. Box 784
    Milwaukee, WI  United States  53211

    Wisconsin Department of Transportation

    Council on Research, 4802 Sheboygan Avenue, P.O. Box 7965
    Madison, WI  United States  53707-7965

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Horowitz, A
    • Wu, Jingxian
    • Duarte, J P
  • Publication Date: 2004-10

Language

  • English

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 128 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00987684
  • Record Type: Publication
  • Report/Paper Numbers: Report No. 0092-45-17,, Final Report
  • Contract Numbers: SPR-0092-45-17
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Mar 11 2005 12:00AM