Take 2: Regulating traffic flow with stop lights at entrance ramps

Talking Michigan Transportation · Jun 25, 2025 · 27m · transcript

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…