California_State_Route_27
State Route 27, commonly known by its street name Topanga Canyon Boulevard (/təˈpæŋɡə/ ⓘ), is a state highway in the U.S. state of California that runs from the Pacific Coast Highway (California State Route 1) at Topanga State Beach near Pacific Palisades, through the Topanga Canyon in Topanga, and continuing through Woodland Hills, Canoga Park, West Hills, and Chatsworth to the Ronald Reagan Freeway (State Route 118).
| Topanga Canyon Boulevard | ||||
SR 27 highlighted in red | ||||
| Route information | ||||
| Maintained by Caltrans | ||||
| Length | 19.974 mi[1] (32.145 km) | |||
| Existed | 1963[1]–present | |||
| Tourist routes |  Topanga Canyon Boulevard through Topanga Canyon | |||
| Major junctions | ||||
| South end |  SR 1 at Topanga Beach | |||
| Major intersections |  US 101 in Woodland Hills | |||
| North end |  SR 118 in Chatsworth | |||
| Location | ||||
| Country | United States | |||
| State | California | |||
| Counties | Los Angeles | |||
| Highway system | ||||
| ||||
As one of the only routes across the Santa Monica Mountains, SR 27 is heavily traveled by commuters from the western San Fernando Valley heading to Santa Monica or Interstate 10.[2]
SR 27 begins at SR 1 near the Pacific Ocean at Topanga County Beach, in an unincorporated area of Los Angeles County east of Malibu. It travels north as Topanga Canyon Boulevard, cutting through Topanga State Park. Upon exiting the park, SR 27 provides access to Fernwood, Topanga, Sylvia Park, and Glenview, all unincorporated. SR 27 continues winding into the San Fernando Valley, nearly entering Calabasas before entering the Los Angeles community of Woodland Hills. The route becomes a major city arterial through the valley, intersecting US 101 before entering Warner Center and Canoga Park. After traversing Chatsworth, SR 27 ends just past an interchange with the SR 118 freeway, thus providing access to the unincorporated area north of Chatsworth.[3]
A segment of Metro Local line 150 runs on Topanga Canyon Boulevard between Ventura Boulevard and Devonshire Street.[citation needed]
Except for a small portion in the mountains, SR 27 is part of the National Highway System,[4] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[5] SR 27 is eligible for the State Scenic Highway System.[6] A portion of it through Topanga Canyon has been officially designated as a scenic highway by the California Department of Transportation.[7][8]
The original state highway system in 1933 included a highway from near Topanga Beach to Montalvo-San Fernando Road near Chatsworth.[9] Two years later, this was numbered as Route 156.[10] The route was redesignated as SR 27 in the 1964 state highway renumbering.[11]
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers to an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see California postmile § Official postmile definitions).[1] Segments that remain unconstructed or have been relinquished to local control may be omitted. The entire route is in Los Angeles County.
| Location | Postmile [1][12][13] | Destinations | Notes | ||
|---|---|---|---|---|---|
| | 0.00 | SR 1 (Pacific Coast Highway) – Malibu, Santa Monica | South end of SR 27; former US 101 Alt. | ||
| Los Angeles | 11.06 | Mulholland Drive | Former SR 268 | ||
| 12.28 | Ventura Boulevard | Former US 101 and US 101 Bus. | |||
| 12.43 | US 101 (Ventura Freeway) – Ventura, Los Angeles | Interchange; US 101 north exits 27A-B, south exit 27 | |||
| | Victory Boulevard | ||||
| 18.63 | Devonshire Street – San Fernando | Former SR 118 east | |||
| | Santa Susana Pass Road | Former SR 118 west | |||
| 20.06 | SR 118 (Ronald Reagan Freeway) | Interchange; north end of SR 27; SR 118 exit 34 | |||
| 20.06 | Poema Place | Continuation beyond SR 118 | |||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi | |||||
- California Department of Transportation. "State Truck Route List". Sacramento: California Department of Transportation. Archived from the original (XLS file) on September 5, 2015. Retrieved June 30, 2015.
- Sternfield, Marc (March 26, 2024). "Topanga Canyon still 'too dangerous' to reopen". KTLA. Retrieved March 27, 2024.
- Los Angeles County Road Atlas (Map). Thomas Brothers. 2008.
- Federal Highway Administration (March 25, 2015). National Highway System: Los Angeles, CA (PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved October 18, 2017.
- Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
- "Article 2.5 of Chapter 2 of Division 1". California Streets & Highways Code. Sacramento: California Office of Legislative Counsel. Retrieved February 6, 2019.
- California Department of Transportation (August 2019). "Officially Designated State Scenic Highways and Historic Parkways" (XLSX). Sacramento: California Department of Transportation. Retrieved October 18, 2017.
- Tallal, Jimy (October 20, 2017). "Topanga Canyon Boulevard Named State Scenic Highway". The Malibu Times. Retrieved October 21, 2017.
- California State Assembly. "An act to amend sections 2, 3 and 5 and to add two sections to be numbered 6 and 7 to an act entitled 'An act to provide for the acquisition of rights of way for and the construction, maintenance..." Fiftieth Session of the Legislature. Statutes of California. State of California. Ch. 767 p. 2034–2042.
- California State Assembly. "An act...relating to State highways". Fifty-first Session of the Legislature. Statutes of California. State of California. Ch. 274.
- California State Assembly. "An act to add Section 253 and Article 3 (commencing with Section 300) to Chapter 2 of Division 1 of, and to repeal Section 253 and Article 3 (commencing with Section 300) of Chapter 2 of Division 1 of, the..." 1963 Session of the Legislature. Statutes of California. State of California. Ch. 385 p. 1182.
- California Department of Transportation (July 2007). "Log of Bridges on State Highways". Sacramento: California Department of Transportation.
