Ramp Meters on Trial

This is a recording of a talk I gave at the University of Minnesota back in the early 2000s about Ramp Meters on Trial. Ramp meters were controversial when I first arrived in Minnesota, as the delays on ramps were uncapped, so people might wait 10 or even 20 minutes before being allowed onto the freeway. This led to a ramp meter shutdown in 2000, which was a great “natural” experiment. [Link]

Our research on the topic includes: