01049283

Component

https://doi.org/10.3141/2012-06

http://scholar.google.com...shel&publication_year=2007

A systemwide adaptive ramp-metering (SWARM) system is being implemented in the Portland, Oregon, metropolitan area, replacing the previous pretimed ramp-metering system. SWARM has been deployed on six major corridors and operates during the morning and afternoon peak hours. This study entails a before and after evaluation of the benefit of the new SWARM system as compared with the pretimed system using the existing data, surveillance, and communications infrastructure. In particular, the objective of this study is to quantify the systemwide benefits in relation to savings in delay, emissions and fuel consumption, and safety improvements on and off the freeway due to the implementation of the SWARM system. A pilot study was conducted for 2 weeks on a 7-mi freeway corridor in an attempt to develop a strategic design for the future regional-level study. This paper discusses the selection process of the study corridor, the experimental design, and the results obtained from the pilot study.

01084472

English

pp 47-56

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104388

Print

Figures (9) ; References (12) ; Tables (1)

Before and after studies; Benefits; Exhaust gases; Fuel consumption; Highway corridors; Peak hour traffic; Pilot studies; Ramp metering; Traffic delays; Traffic safety

Systemwide adaptive ramp metering

Portland (Oregon)

Energy; Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB

Feb 8 2007 6:43PM

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