Fuzzy ramp metering: Design overview and simulation results

Cynthia Taylor, Deirdre Meldrum, Les Jacobson

Research output: Contribution to journalReview articlepeer-review

42 Scopus citations


A fuzzy logic ramp-metering algorithm was designed to overcome the limitations of conventional ramp-metering strategies. The fuzzy controller demonstrated improved robustness, prevented heavy congestion, intelligently balanced conflicting needs, and tuned easily. The objective was to maximize total distance traveled and minimize total travel time and vehicle delay, while maintaining acceptable ramp queues. A multiple-ramp study site from the Seattle I-5 corridor was modeled and tested using the freeway simulation software, FRESIM. For five of the six testing sets, encompassing a variety of traffic conditions, the fuzzy controller outperformed the three other controllers tested.

Original languageEnglish (US)
Pages (from-to)10-18
Number of pages9
JournalTransportation Research Record
Issue number1634
StatePublished - Jan 1 1998
Externally publishedYes

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering


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