Santa Barbara to Mussel Shoals Home
Widening Projects

SBCAG and Caltrans have undertaken widening 16 miles of Highway 101, known as Highway 101: Santa Barbara to Mussel Shoals, to add carpool lanes and address a narrow portion of Highway 101 that currently has two lanes in each direction. The project is phased as depicted on the Project Location Map below. Phases 1 and 2 are complete. Phase 3 is in construction, and Phase 4 is planned to begin in 2020.

Back to Widening ProjectsPhase 3
Carpinteria to Santa Barbara
California Department of Transportation (Caltrans Title) California Department of Transportation (Caltrans Title) Santa Barbara County Association of Governments Santa Barbara County Association of Governments
Carpinteria to Santa Barbara

Status
Design, Environmental Review

Components

  • Hwy 101 widening (10.9 miles)
  • Carpool lanes added
  • Cabrillo Blvd Interchange
  • Sheffield Dr Interchange
  • Rehabilitate existing lanes
  • Sound Walls
  • Creek Bridges

Cost
$585 million

Construction
Beginning FY 2020

Funding
Measure A, SB1, state and federal gas taxes

City of Carpinteria, California - Incorporated 1965 City of Carpinteria, California Santa Barbara Logo Santa Barbara Logo Santa Barbara County seal Santa Barbara County seal

Click on the Highway 101 phase for more project details

Phase 4A

Phase 4A will widen Highway 101 to 3 lanes in each direction within the City of Carpinteria boundaries. The project includes new bridges over Franklin and Santa Monica Creeks along with ramp improvements at Santa Monica Road, Carpinteria Avenue, and Reynolds Avenue. There are four sound walls planned in Phase 4A.

Phase 4A

View Detailed Phase 4A Map

Phase 4A Phase 4A

Phase4A map View Detailed Phase 4A Map Phase 4A will widen Highway 101 to 3 lanes in each direction within the City of Carpinteria boundaries. The project includes new bridges over Franklin and Santa Monica Creeks along with ramp improvements at Santa Monica Road, Carpinteria Avenue, and Reynolds Avenue. There are four sound walls planned in Phase 4A.

Phase 4B Phase 4B

Phase4B map View Detailed Phase 4B Map Phase 4B will widen Highway 101 to 3 lanes in each direction between the City of Carpinteria and Summerland. The project includes new bridges over Toro and Arroyo Parida Creeks, the South Padaro Lane Undercrossing, and the North Padaro Lane interchange. Ramp improvements will occur at South and North Padaro Lanes. There are three sound walls in Phase 4B.

Phase 4C Phase 4C

Phase4C map View Detailed Phase 4C Map Phase 4C will widen Highway 101 to 3 lanes in each direction in Summerland. The project includes new bridges for the Evans Avenue and Sheffield Drive Undercrossings. Ramp improvements will occur at Sheffield Drive, Evans Avenue, and Wallace Avenue. There are two sound walls in Phase 4C.

Phase 4D and E Phase 4C

Phase4DE map View Detailed Phase 4D & E Map Phases 4D & E will widen Highway 101 to 3 lanes in each direction between Sycamore Creek in the City of Santa Barbara up to Romero Creek in Montecito (west of Sheffield Drive). Included are the reconstruction of the Hwy 101 bridges over Cabrillo Boulevard and a new southbound on-ramp (replacing the lefthand ramp removed in Phase 1). Bridges will be replaced at Montecito, San Ysidro, Oak, and Romero Creeks. Sound walls are included, and this design phase is also proposing to integrate some operational and safety improvements on Highway 101 and the ramps.