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San Luis Obispo County, California

Public Works
Wade Horton


County of San Luis Obispo Public Works Department
Receives Prestigious APWA Accreditation

976 Osos Street
Room 206
San Luis Obispo, CA 93408
Map & Directions

Business Hours:
Monday through Friday
8:00 am - 5:00 pm

(805) 781-5252


(805) 781-1229



The Traffic Engineering Department maintains the following traffic signals:
South Bay Boulevard @ Santa Ysabel (Los Osos)
Los Osos Valley Road @ Doris Avenue (Los Osos)
Los Osos Valley Road @ 9th / 10th Street (Los Osos)
Los Osos Valley Road @South Bay Boulevard (Los Osos)
Los Osos Valley Road @ Foothill Road (Los Osos)
Los Osos Valley Road @ Palisades (Los Osos)
Tefft Street @ Thompson
Tefft Street @ Mary Avenue (Nipomo) 
Tefft Street @ Orchard Avenue (Nipomo)
Tefft Street @ Pomeroy Road (Nipomo)
Tefft Street @ Oakglen Avenue (Nipomo)
Vineyard Drive @ Main Street (Templeton)
Orchard @ Division
Main @ Pine Knolls
South Bay @ El Morro
Las Tablas @ Bennet
San Luis Bay @ Avila Beach Dr
Avila Beach Dr @ 1st St
Willow @ Pomeroy (In Design)

Questions, comments, and concerns during business hours (M-F 8-5) contact the Public Works Department at (805) 781-5252. or use our Contact Us form
All emergencies on the weekends, evenings, and holidays contact the California Highway Patrol at (805) 593-3333.


The Traffic Engineering Department is not responsible for most of the streetlights in the unincorporated areas of San Luis Obispo County.
Streetlights are maintained by PG&E. Outages or other problems should be reported directly to PG&E at 1-800-743-5000. PG&E will require the following information:

  • Pole Type (wood or steel)
  • Pole Number (located on the pole)