On this week’s Talking Michigan Transportation podcast, some context from elsewhere on freeway ramp metering, where it works well and why.

First, Angie Drumm, deputy director of traffic and safety for the Colorado Department of Transportation (CDOT) region that includes Metro Denver, joins the conversation to talk about the history there and what’s been learned.

Later, Lawrence Dwyer, director of safety and mobility at the American Association of State Highway and Transportation Officials (AASHTO), offers a national perspective on the concept and other innovations in traffic safety.

This podcast is the second of two focusing on ramp metering. Last week, the conversation focused on implementation of the approach on I-96 in Michigan’s western Oakland County.