Considering various ALINEA ramp metering strategies for crash risk mitigation on freeways under congested regime

Mohamed Abdel-Aty, Albinder Dhindsa, Vikash Gayah

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

This study evaluates the expected benefits of using the ALINEA ramp metering algorithm as a method for real-time safety improvement on an urban freeway. The objective of this research is to use ramp metering to produce a significant decrease in the risk of crashes on the freeway while avoiding any significant adverse effects on operation. This is achieved by simulating the freeway during the congested period in micro-simulation and testing various ramp metering configurations to determine which provides the best results. Statistical measures developed for the same stretch of freeway using loop detector data are used to quantify the risk of crashes as well as the benefits in each of the alternative strategies. The study concludes that there are significant benefits in metering multiple ramps when the feedback ramp metering algorithm is implemented at multiple locations. It was found that increasing the number of metered on-ramps produces increasing safety benefits. Also, a shorter cycle length for each of the meters and a higher critical occupancy value leads to better results.

Original languageEnglish (US)
Pages (from-to)113-134
Number of pages22
JournalTransportation Research Part C: Emerging Technologies
Volume15
Issue number2
DOIs
StatePublished - Apr 2007

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Automotive Engineering
  • Transportation
  • Computer Science Applications

Fingerprint Dive into the research topics of 'Considering various ALINEA ramp metering strategies for crash risk mitigation on freeways under congested regime'. Together they form a unique fingerprint.

Cite this