Most Congested Roads, 2012 Below are the most congested roads in the United States, including the average speed and travel time delay for the worst stretches of asphalt in 2012. RoadLocationAverage speedTravel time delay Cross Bronx Expressway New York, N.Y.13 mph41 min I-405 SB Los Angeles, Calif.14 mph26 min Van Wyck Expressway SB New York, N.Y.12 mph23 min I-10 EB Los Angeles, Calif.19 mph32 min CA-91 Riverside, Calif.22 mph38 min Long Island Expressway EB New York, N.Y.19 mph33 min Brooklyn Queens Expressway SB New York, N.Y.16 mph27 min I-405 NB Los Angeles, Calif.22 mph31 min I-90/I-94 WB Chicago, Ill.20 mph30 min I-5 SB Los Angeles, Calif.22 mph31 min Source:Traffic Scorecard, INRIX.