Does Peak Car Mean the End of Induced Demand?

Aaron Renn provides a dissenting argument on the implications of peak car, namely, "if we’ve really reached peak car, maybe we really can build our way out of congestion after all."

1 minute read

December 6, 2014, 7:00 AM PST

By James Brasuell @CasualBrasuell


Aaron Renn builds his argument about a counterintuitive implication of peak car on data about the unprecedented decline of vehicle miles traveled since 2005, which has left U.S. Department of Transportation traffic projections (and many others) way off target. In doing so, Renn acknowledges that many freeway projects, driven by "speculative demand," should be questioned. 

Yet in a novel twist, Renn argues that induced demand has a flip side: "In a world of peak car, where traffic levels are flat to declining on a per capita basis, induced demand no longer holds court, certainly not to the level claimed by those who believe it’s pointless to build roads." Even in perpetually congested places like Los Angeles, suggests Renn, "peak car strengthens the argument for building or expanding roads."

Friday, December 5, 2014 in New Geography

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 2, 2025 - Diana Ionescu

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

White and purple sign for Slow Street in San Francisco, California with people crossing crosswalk.

San Francisco Suspends Traffic Calming Amidst Record Deaths

Citing “a challenging fiscal landscape,” the city will cease the program on the heels of 42 traffic deaths, including 24 pedestrians.

July 1, 2025 - KQED

Blue and silver Amtrak train at small station.

Amtrak Rolls Out New Orleans to Alabama “Mardi Gras” Train

The new service will operate morning and evening departures between Mobile and New Orleans.

July 3 - New Orleans City Business

Large spinning swing ride at Chicago's Navy Pier.

The Subversive Car-Free Guide to Trump's Great American Road Trip

Car-free ways to access Chicagoland’s best tourist attractions.

July 3 - Streetsblog Chicago

Aerial view of downtown San Antonio, Texas at night with rotating Tower of the Americas in foreground.

San Antonio and Austin are Fusing Into one Massive Megaregion

The region spanning the two central Texas cities is growing fast, posing challenges for local infrastructure and water supplies.

July 3 - Governing