All you want to do is get on the freeway. Then a seemingly superfluous traffic signal stops you. Do ramp meters work?

Additional reading:
“Ramp Metering: A Proven, Cost-Effective Operational Strategy—A Primer,” Federal Highway Administration

“Ramp Meters,” Wikipedia

“Cost Estimates for ITS Devices of the T-REX Project” Summary, US Dept. of Transportation, 11/2001

“The Minimum Yellow Timing for Ramp Meters,” Wang, Liu

“Case Studies of U.S. Freeway-to-Freeway Ramp and Mainline Metering and Suggested Policies for Washington State,” Jacobson, Landsman

“A Case for Freeway Mainline Metering,” Habobian

Road Guy Rob

Rob is a 12-year veteran public radio reporter and talk show producer. Other staffers at the station called him the "road guy" because he kept running off to cover all the transportation stories. Rob has degrees in Geography (BS, 2010) and Civil Engineering (MS, 2018).

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