California State Route 135
|Defined by S&HC § 435|
|Maintained by Caltrans|
|Length:||21.141 mi (34 km)
(Does not include overlaps with SR 1 and US 101 Bus.)
|South end:||US 101 at Los Alamos|
|North end:||US 101 / SR 166 in Santa Maria|
State Route 135 is a state highway in the U.S. state of California, entirely within Santa Barbara County, and is basically a bypass of U.S. Route 101 in northern Santa Barbara County between the town of Los Alamos and the city of Santa Maria.
Route description 
SR 135 starts off as Bell Street in Los Alamos and goes along with Vandenberg Road after an intersection with Harris Grade Road before merging with State Route 1 south of Orcutt. There is a brief freeway portion at the northern split of SR 135 and SR 1, but it quickly reverts to a city street upon crossing Clark Avenue. North of Santa Maria Way, it is considered Business US 101, although signage is poor. SR 135 continues its northbound journey as Broadway and passes through the Santa Maria Town Center shopping center at the intersection with Main Street (State Route 166). SR 135 meets US 101 again just before crossing the Santa Maria River at the Santa Barbara/San Luis Obispo county line.
State Route 135 is the original routing for US 101 from Santa Maria to Los Alamos until the current alignment was completed in 1933. But instead of turning east just before old town Orcutt and then north into Santa Maria as it does currently, it continued north along what is now Graciosa road and then Marcum Street linking up with E. Clark Avenue just north of the Orcutt water tower. It then followed Clark Avenue east through old Orcutt and turned north on Orcutt Road at the location of the current Highway 135/Clark Avenue interchange and headed north through Santa Maria.
Major intersections 
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, and do not necessarily reflect current mileage. R reflects a realignment in the route since then. The entire route is in Santa Barbara County.
|Los Alamos||0.00||US 101 – Santa Maria, San Francisco, Santa Barbara, Los Angeles||Interchange|
|1.00||Bell Street||Former US 101 north|
|M9.10||Harris Grade Road – Lompoc||Former SR 1 south (Restricted area for trucks and autos with trailers that are over 30 feet long).|
|M9.61||San Antonio Road – Vandenberg AFB|
|SR 1 south – Vandenberg AFB, Lompoc||Interchange; south end of SR 1 overlap; southbound right exit and northbound entrance; former CR S20 south|
|South end of freeway on SR 1|
|SR 1 north – Guadalupe||Interchange; North end of SR 1 overlap; northbound left exit and southbound entrance|
|Orcutt||R10.41||17||Clark Avenue – Orcutt|
|North end of freeway|
US 101 Bus. south (Santa Maria Way) to US 101 / St. Andrews Way
|South end of US 101 Bus. overlap|
|15.77||SR 166 (Main Street) – Guadalupe|
|17.81||US 101 / SR 166||Interchange; north end of US 101 Bus. overlap|
- Indicates that the postmile represents the distance along SR 1 rather than SR 135.
- California Department of Transportation, State Truck Route List (XLS file), accessed February 2008
- http://www.cahighways.org/129-136.html#135 July 2010
- http://www.historicmapworks.com/Map/US/839394/Santa+Barbara+County+Map July 2010
- California Department of Transportation, Log of Bridges on State Highways, July 2007
- California Department of Transportation, All Traffic Volumes on CSHS, 2005 and 2006
- California Department of Transportation, California Numbered Exit Uniform System, State Route 135 Freeway Interchanges, Retrieved on 2009-02-07.