Since their implementation, ramp meters have served a wide
variety of purposes. Ramp meters are traffic signals on freeway
entrance ramps that break up clusters of vehicles entering the
freeway to make merging safer.
Ramp meters can also store and spread
out the volume of vehicles entering onto the freeway so it is less
likely to become congested and the overall rate of travel is
Ramp meters are currently used in the greater Milwaukee area and
on Dane County's Madison Beltline (US 12).
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Last modified: August 1, 2012