Study Reveals the Futility of Building Out of Congestion

Even if widening highways enough to relieve all congestion were possible, it would only benefit a very small number of commuters, according to new research.

1 minute read

September 19, 2018, 5:00 AM PDT

By James Brasuell @CasualBrasuell


Traffic

Bildagentur Zoonar GmbH / Shutterstock

"Urban planners should abandon their obsession with fighting congestion in favor of building more housing in traffic-choked cities because people who live in congested urban centers actually have better access to good jobs and economic opportunity," writes Angie Schmitt.

Schmitt arrives to that conclusion from data provided in a study by researchers from the University of California, Los Angeles, titled "Not so fast? Examining neighborhood-level effects of traffic congestion on job access" and published by the Transportation Research Part A journal.

The study examined the regions around San Francisco and Los Angeles, finding that "commuters who lived near uncongested highways on the fringes of the region couldn’t get to the best jobs faster than people living within the high-traffic areas."

Schmitt provides more detail from the study, while also sending a message to all the state departments of transportation laboring in an effort to built regional automobile transportation systems out of congestion:

Even if congestion could be dramatically improved across the Bay Area, the authors found, the effects on job access would be relatively minor. As frustrating as congestion is to drivers, only 5 to 12 percent of the region’s residents would see an “appreciable” increase in job access if congestion was essentially eliminated, the job access models the team created showed. That, practically speaking, would be impossible or cost prohibitive to accomplish anyway.

Monday, September 17, 2018 in Streetsblog USA

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.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Color-coded map of labor & delivery departments and losses in United States.

The States Losing Rural Delivery Rooms at an Alarming Pace

In some states, as few as 9% of rural hospitals still deliver babies. As a result, rising pre-term births, no adequate pre-term care and "harrowing" close calls are a growing reality.

June 15 - Maine Morning Star

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

June 15 - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

June 15 - The Washington Post