structural:expansion
Freeways

The city and the rest of the Los Angeles metropolitan area are served by an extensive network of freeways and highways. Texas Transportation Institute 's annual Urban Mobility Report ranked Los Angeles area roads the most congested in the United States in 2019 as measured by annual delay per traveler, area residents experiencing a cumulative average of 119 hours waiting in traffic that year. Los Angeles was followed by San Francisco/ Oakland, Washington, D.C., and Miami. Despite the congestion in the city, the mean daily travel time for commuters in Los Angeles is shorter than other major cities, including New York City, Philadelphia and Chicago. Los Angeles's mean travel time for work commutes in 2006 was 29.2 minutes, similar to those of San Francisco and Washington, D.C.

The major highways that connect LA to the rest of the nation include Interstate 5, which runs south through San Diego to Tijuana in Mexico and north through Sacramento, Portland, and Seattle to the Canada–US border; Interstate 10, the southernmost east–west, coast-to-coast Interstate Highway in the United States, going to Jacksonville, Florida; and U.S. Route 101, which heads to the California Central Coast, San Francisco, the Redwood Empire, and the Oregon and Washington coasts.