Westbound Highway 4 between Antioch and Pittsburg took third place on the list compiled by a company called INRIX. Southbound 101 in San Jose placed ninth.
INRIX measured delays by looking at data from drivers' smartphones and GPS devices in four million vehicles.
As for America's worst backups, they're along Highway 91 in the Los Angeles area and Interstate H1 in Honolulu.
The top 20 also included two other southern California freeways.
