10 US cities with the worst traffic jams
Average commute during worst driving hours: 49 percent longer on Thursday at 5:15 p.m.
This northwest city's traffic is at its worst on I-405 Southbound between Exit 14 and Exit 10. Normally this 4.5-mile trip takes five minutes to complete with no traffic, but can take 13 minutes during rush hour and 18 minutes Thursday evenings.
Pictured: Traffic on Interstate 5 in Seattle.