As of Sunday, October 7, 2012
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Gwinnett Daily Post
BUFORD -- The Georgia Department of Transportation installed a new meter on I-85 entrance ramp at Ga. Highway 20 on exit 115 in Buford, which begins operating Wednesday.
Ramp meters are turned on before rush hour and other times of day depending on traffic patterns. Every three to five seconds, a cycle from red to green allows one vehicle at a time to merge onto the freeway. On two-lane ramps, the left and right lanes have alternating lights, so the left lane goes while the right is stopped, and vice versa.
Currently 170 ramp meters are operational in metro Atlanta to reduce average rush-hour commute times, reduce fuel consumption, merging accidents and vehicle emissions, according to a release.-- From staff reports