When the ramp metering system on Minneapolis-St. Paul freeways was shut down, speeds fell by seven percent.

February 2001
Minneapolis-St. Paul,Minnesota,United States

Summary Information

A Minnesota Department of Transportation (Mn/DOT) study revealed the impacts of shutting down an extensive ramp metering system on Minneapolis-St. Paul area freeways for a 6-week evaluation period. The study analyzed data collected from four test corridors chosen to represent typical freeway configurations and conditions across the region. The study collected a variety of data using several data collection techniques, including probe vehicles operated during peak periods, traffic volume counts from existing traffic detectors and temporary installations, crash statistics, and traveler surveys.


Results indicated that without ramp meters there was:

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Twin Cities Ramp Meter Evaluation

Published By: Minnesota DOT

Prepared by Cambridge Systematics for the Minnesota DOT

Source Date: February 2001

EDL Number: 13425



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Goal Areas


Typical Deployment Locations

Metropolitan Areas


ramp meters

Benefit ID: 2002-00233