U.S. cities dominate the world's top 10 most-traffic-congested urban areas, with Los Angeles leading in mind-numbing and costly gridlock, according to a new report issued Tuesday.

La La Land, with its jam-packed freeways and driving culture despite billions being poured into rail transit, emerged from the 1,360 other cities in 38 countries to claim the worst-congestion title for the sixth consecutive year in the 2017 traffic scorecard by INRIX, a leader in transportation analytics and connected car services.