The Worst Cities for Traffic

INRIX, a traffic analysis company, recently released its 100 Most Congested Metros list. Los Angeles and New York predictably come out on top, but the more interesting finding is that traffic has increased significantly.

1 minute read

March 31, 2011, 9:00 AM PDT

By Tim Halbur


On average, says INRIX, traffic is up 10% since 2009. Why?

Population growth and an increase in interstate traffic due to the economic recovery, says INRIX.

They conclude, "When employment returns to 2007 levels, 9 MILLION more daily commute trips than 2010 levels will need to be accomodated, further stressing America's urban highway network."

And predictably, corridors that have the worst congestion will attract more congestion:

"We fully expect-should growth continue and particularly if job growth picks up-to see congested corridors get longer in length, have delays more hours of each day, and see slower traffic while congested. This triple whammy of longer (length), longer (time), and slower is likely to be the primary contributor to congestion growth in 2011, as it appears to have been in 2010."

Thursday, March 31, 2011 in INRIX

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

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

October 28, 2026 - Zachary Whalen

A car drives through a puddle, making a large splash. Rain pours down.

California plans to bury El Niño’s downpour

If the state plays its cards right, it may be able to store a billion acre-feet of El Niño’s water in aquifers.

October 28, 2026 - Grist

Lake Powell with much of the water evaporated.

Desperate measures: Advocates weigh draining Lake Powell to fill Colorado River

Draining the reservoir could reduce evaporation losses by a couple hundred thousand acre-feet.

October 30, 2026 - Yale Environment 360

Mamdani behind a microphone, in front of a snowbank

Mamdani’s pied-à-terre tax survives legal challenge

A panel of judges found that the plaintiffs failed to demonstrate injury as a result of New York City's implementation of the tax.

November 6 - CNN

A road in north eastern Nebraska with power lines on either side, and grassy fields.

Eastern Nebraska is running out of electricity

Data centers and electrification are straining eastern Nebraska’s grid, throttling economic development.

November 6 - Grist

People board a bus in Seattle.

Seattle passes record-breaking transit services expansion

Proposition 1 will double the city’s transit tax to add 95,000 more bus trips and preserve 180,000 bus trips annually.

November 6 - KOMO News

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.