Did Your Traffic Improve Last Year?

According to a new study out this week by research group INRIX, urban traffic congestion in the U.S. plummeted last year by 30 percent over the previous year. Angie Schmitt summarizes the surprising findings, and investigates what the cause may be.

2 minute read

May 24, 2012, 9:00 AM PDT

By Jonathan Nettler @nettsj


Released this week, INRIX's Annual Traffic Scorecard analyzed congestion on highways in America's 100 largest cities and found that 70 metropolitan areas saw declines in their traffic congestion in the past year. "In addition to high gas prices and poor economic performance, INRIX
attributed vanishing congestion in part to a decline in road
construction brought on by the completion of most stimulus projects, as
well as uncertainty around federal infrastructure funding and anemic
local and state budgets," notes Schmitt, who raises some additional questions about the true causes for the decline.

"National declines in driving or increases in transit ridership were not mentioned as contributing factors. Still, it's somewhat mysterious. Was the economy really so much worse
in 2011 than 2010? Growth did slow down some in that time, but it was still positive. Or is something else going on here - like the 'decoupling' of driving from economic fluctuations?"

INRIX's study provides a lot to chew on. In addition to the nationwide statistics, the scorecard also ranked the individual U.S. cities with the worst traffic congestion, the most congested corridors, and the best and worst times to commute.

Summarizing the results in The Atlantic Cities, Tyler Falk reports that Honolulu has won the dubious prize of most congested city. "INRIX changed their methodology
this year look [sic] at travel time for individuals rather than overall
congestion, which rocketed Honolulu to the top of the list (from 37th
last year)." Los Angeles and San Francisco rounded out the top three. 

Tuesday, May 22, 2012 in Streetsblog D.C.

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

Get top-rated, practical training

Concrete Brutalism building with slanted walls and light visible through an atrium.

What ‘The Brutalist’ Teaches Us About Modern Cities

How architecture and urban landscapes reflect the trauma and dysfunction of the post-war experience.

February 28, 2025 - Justin Hollander

Complete Street

‘Complete Streets’ Webpage Deleted in Federal Purge

Basic resources and information on building bike lanes and sidewalks, formerly housed on the government’s Complete Streets website, are now gone.

February 27, 2025 - Streetsblog USA

Green electric Volkswagen van against a beach backdrop.

The VW Bus is Back — Now as an Electric Minivan

Volkswagen’s ID. Buzz reimagines its iconic Bus as a fully electric minivan, blending retro design with modern technology, a 231-mile range, and practical versatility to offer a stylish yet functional EV for the future.

March 3, 2025 - ABC 7 Eyewitness News

View of mountains with large shrubs in foreground in Altadena, California.

Healing Through Parks: Altadena’s Path to Recovery After the Eaton Fire

In the wake of the Eaton Fire, Altadena is uniting to restore Loma Alta Park, creating a renewed space for recreation, community gathering, and resilience.

March 9 - Pasadena NOw

Aerial view of single-family homes with swimming pools in San Diego, California.

San Diego to Rescind Multi-Unit ADU Rule

The city wants to close a loophole that allowed developers to build apartment buildings on single-family lots as ADUs.

March 9 - Axios

Close-up of row of electric cars plugged into chargers at outdoor station.

Electric Vehicles for All? Study Finds Disparities in Access and Incentives

A new UCLA study finds that while California has made progress in electric vehicle adoption, disadvantaged communities remain underserved in EV incentives, ownership, and charging access, requiring targeted policy changes to advance equity.

March 9 - UCLA Luskin Center for Innovation