Southern California's romance with the automobile owes in large part to resentment of the Southern Pacific Railroad's … See more

Caltrans or local transportation agencies have identified the following priority freeway projects:
• A toll road that will go through a tunnel in the Santa Ana Mountains from Irvine to Corona… See more

Southern California residents idiomatically refer to freeways with the definite article, as "the [freeway number]", e.g. "the 5" or "the 10". This use of the article differs from other American dialects, including that of Northern C… See more

• First freeway in California (Arroyo Seco Parkway linking Pasadena and Los Angeles)
• First stack interchange (Four Level Interchange in downtown Los Angeles)
• First grade-separated HOV lanes … See more

The following limited-access roads are not maintained by the state:
• Colorado Street, former routing of State Route 134, from Interstate 5 to San Fernando Road just west of Glendale
• Colorado Freeway, … See more

• Interstate 5 south terminus at San Ysidro in San Diego, northbound to the Central Valley and Sacramento
• Interstate 8 west terminus in Ocean Beach in San Diego, eastbound to the Arizona State Line towards Yuma … See more