Route 91 is from:
Route 91 from Route 405 to Route 215 near Riverside. [CS&HC Sec. 253.5]
From Route 110 near Torrance to Route 215. From Route 110 to Route 710, it is called the "Gardena Freeway" and the "Redondo Beach Freeway". From Route 710 to Route 5, it is called the "Artesia Freeway". From Route 5 to Route 215, it is called the "Riverside Freeway".
A portion of this route before 1964 was numbered as Route 14. It previously ran on Artesia Boulevard. The portion of Route 91 going through Santa Ana Canyon was once known as U.S. Highway 91. In fact, before 1964, U.S. 91 ran from Long Beach to the Nevada state line via Routes 1, 19(?), 91, 215 north, and 15 north.
Route 91 from Route 55 near Santa Ana Canyon to Route 15 near Corona. [CS&HC Sec. 263.5]
Even though Route 91 no longer goes to Hermosa Beach, here's a link to Hermosa Wave, which features up-to-the-minute webcam views, weather information, and links to other Hermosa-Beach-related mania. Shops and restaurants are prevalent and there's a beach to match.
For the more mild-mannered theme park enthusiast, Knott's Berry Farm and Independence Hall in Buena Park is located south on Beach Boulevard (Route 39).
HOV lanes currently run from Main Street in Carson to Route 55. Occupancy is 2 or more persons per vehicle and are in operation all day. Additionally, Route 91 features HOT (High Occupancy Toll) lanes. A transponder is required to use these lanes, since there is no cash collection. See below.
Cal State Dominguez Hills is south on Avalon Boulevard in Carson. Compton Community College is north on Santa Fe Avenue in Compton.
If you want to take a ride on the Metro Blue Line, you have to follow a few directions. Heading west on Route 91, exit on Acacia Avenue and make a right on Artesia Boulevard. Heading east, exit on Alameda Street and continue west on Artesia Boulevard. On both cases, find the Park-and-Ride lot and head in. Also located there is the Crystal Park Casino Hotel. For more information, go to the Union Station page.
The interchange of Routes 19 and 91 is the only occurrence in California where reverse-numbered routes meet.
You've probably heard about it. There are high-tech toll lanes running in the middle of Route 91 via Santa Ana Canyon. In order to use these lanes, you must purchase a transponder and pay a monthly measured rate, based on the time of day you drive. Sensors built over the toll lanes detect the device installed on the windshield of your car. If your car is not installed with a transponder, the sensor will immediately ring on the camera ahead to take a picture of your license plate. A horrifying fine will come in the mail. These lanes are operated by the Orange County Transportation Authority. For information on rates and updates, visit the official 91 Express Lanes website. Don't have the transponder? Tough luck; you're condemned to use the regular lanes, which are among the most congested in Southern California.