One-Third of Nation’s 30 Worst Traffic Bottlenecks Are in Los Angeles Area, Study Shows

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Traffic crawls along the 405 Freeway near the 22 and 605 freeways in Seal Beach. (Credit: Cheryl A. Guerrero / Los Angeles Times)

Every Southern California commuter who has stared through the windshield at stop-and-go traffic can name at least one portion of a freeway that makes rush-hour driving particularly painful.

Mostly, they’re the usual suspects: the 405 Freeway through the Sepulveda Pass, the 5 Freeway through Commerce, the 101 Freeway through the San Fernando Valley.

But a less common way to analyze which bottlenecks are the worst has turned up a few surprises.

A study released Monday by the American Highway Users Alliance, a nonprofit group that lobbies for interstate highway investment, examined which routes in the United States are the most continuously crowded, 24 hours a day, rather than during peak periods. Eleven of the 30 worst bottlenecks are in Greater Los Angeles.

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