Skip to Content
Streetsblog California home
Streetsblog California home
Log In
Damien Talks

DamienTalks 40 – Michael Manville on Automatic Road Widenings

It's been a while since we recorded a #DamienTalks specifically for the California website, but now we're back with a good one. In this week's edition, Damien Talks with Michael Manville, a professor and researcher at UCLA.

#DamienTalks

Manville has hit a bit of Livable Streets fame with an article he wrote for the Journal of Transportation and Land Use. In that article, he outlines why laws requiring developers to invest in road widening to "mitigate" traffic created by their development don't actually do anything to improve traffic flow locally or regionally.

Almost nobody who understands transportation planning believes that these requirements do anything to improve traffic flow--yet these laws persist.

Manville doesn't only debunk the theory behind the laws, but also offers a solution...should policy makers heed his call.

You can read "Automatic street widening: Evidence from a highway dedication law" at the Journal of Transportation and Land Use here, and a summary of the article from Streetsblog USA here.

We’re always looking for sponsors, show ideas, and feedback. You can contact me at damien@streetsblog.org, at twitter @damientypes, online at Streetsblog California or on Facebook at StreetsblogCA.

Stay in touch

Sign up for our free newsletter

More from Streetsblog California

The State of the Transit Strike in Silicon Valley on Its Tenth Day

The ATU wants higher wages and worker protections. The VTA is appealing to the courts. 100,000 transit riders are caught in the middle.

March 19, 2025

Wednesday’s Headlines

VTA, Housing, Transit Funding, More Questionable News Out of DC, and more...

March 19, 2025

Is the Overnight Train A Luxury or a Necessity?

Before the advent of the car in the 1960s, sleeper trains were America's primary method of long-distance transportation — but today, it's more often seen as a luxury. Is it time for that to change?

March 18, 2025

Advocates Resist Muni Service Cuts

Is this a transit-first city? Or a cut-transit-first city?

March 18, 2025

Assemblymember Gipson Celebrates Passage of Hit-and-Run Law

“I know that nothing can bring D’Ancee back."

March 18, 2025
See all posts