The Top Ten: America's Worst Highway Bottlenecks

The Top Ten

America's Worst Highway Bottlenecks

Rank City Freeway Location Vehicles Per Day Annual Hours of Delay
1. Los Angeles US-101 US-101 (Ventura Fwy) at I-405 Interchange 318,000 27,144
2. Houston I-610 I-610 at I-10 Interchange (West) 295,000 25,181
3. Chicago I-90 I-90 I-90/94 at I-290 Interchange ("Circle Interchange") 293,671 25,068
4. Phoenix I-10 I-10 I-10 at SR-51/SR-202 Interchange ("Mini-Stack") 280,800 22,805
5. Los Angeles I-405 I-405 I-405 (San Diego Fwy) at I-10 Interchange 296,000 22,792
6. Atlanta I-75 I-75 I-75 at I-85 Interchange 259,128 21,045
7. Washington (DC-Md.-Va.) I-495 I-495 I-495 at I-270 Interchange 243,425 19,429
8. Los Angeles I-10 I-10 I-10 (Santa Monica Fwy) at I-5 Interchange 318,500 18,606
9. Los Angeles I-405 I-405 (San Diego Fwy) at I-605 Interchange 318,000 18,606
10. Atlanta I-285 I-285 at I-85 Interchange ("Spaghetti Junction") 266,000 17,072

Note: Rankings are based on analysis of 2002 data.
Source: American Highway Users Alliance, Unclogging America’s Arteries 1999–2004. Web:

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