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Project Profile: High Occupancy Vehicle Lanes on US 101 in Santa Barbara County (Segments 4A, 4B, and 4C)

The map shows the US 101 highway as it follows the California coast in Santa Barbara and Ventura counties. The profiled project spans segments 4A, 4B, and 4C for a total distance of 7.5 miles. Construction on Segments 1 through 3 has been completed. Segments 4A, 4B and 4C are fully funded and the remaining segments are partially funded for construction.

The SBCAG Board adopted a phasing approach for implementing the Project by phasing the work into five geographic segments.

Source: Credit to SBCAG (Santa Barbara County Association of Governments) and CALTRANS (California Department of Transportation)

Project Name

Highway 101: Carpinteria to Santa Barbara


Santa Barbara County, CA

Project Sponsor/Borrower

Santa Barbara County Association of Governments (SBCAG) Santa Barbara County Local Transportation Authority Caltrans District 5 (lead agency)

Program Areas

Alternative Project DeliveryValue CapturePublic-Private Partnerships




The project will construct a 7.5-mile extension of existing High Occupancy Vehicle (HOV) lanes on US 101 in Carpinteria and Santa Barbara County. Additional construction includes sound wall installation, creek crossing improvements, and rebuilding interchanges at Sheffield Drive and Cabrillo Boulevard. The project is part of one phase of a four-phase strategy for providing HOV lane continuity in northern Ventura and southern Santa Barbara counties. The remaining segments in and near the city of Santa Barbara are partially funded.

Traffic volume is overwhelming the existing capacity of the U.S. 101 during weekday and weekend peak periods. The project is expected to reduce congestion, decrease vehicle travel times, and facilitate the flow of goods and services, as well as promote a shift from single-occupancy vehicle trips to carpool, vanpool, and bus travel. The interchange improvements will enhance safety for automobile drivers, freight carriers, bicyclists, and pedestrians. The addition of the HOV lanes will provide better collision response times for first responders and prevent secondary collisions.

The project directly addresses racial equity and reduces barriers to opportunity for residents of disadvantaged communities in Ventura and Santa Barbara counties. Due principally to the high cost of local housing in southern Santa Barbara County, significant numbers of low-income workers rely heavily on this corridor to commute daily from lower-cost homes in Ventura County into employment centers in southern Santa Barbara County.

Cost (millions)

$585.4M (Total project cost)
$455.7M (TIFIA-eligible cost)

Funding Sources

State Highway Operation and Protection Program (SHOPP), Federal: $131.4M
State Transportation Improvement Program (STIP): Federal: $9.4M
Highway Infrastructure Program: $3.1M
TIFIA: $75.0M (direct loan)
State Highway Operation and Protection Program SHOPP, State: $75.6M
State Transportation Improvement Program (STIP): State: $2.9M
California Road Repair and Accountability Act of 2017, Senate Bill 1: $158.4M

Project Delivery / Contract Method

Construction Manager/General Contractor (CM/GC)

Private Partner

Construction: Granite

Project Advisors / Consultants

Financial: KNN Public Finance, LLC


Build America Bureau (TIFIA)

TIFIA Credit Assistance


The two TIFIA loans totaling $38.9 million are the fifth and sixth TIFIA loans that Louisiana has closed as part of a bundled approach, which allows for more efficient processing and expedient closing.
Financial Status/Financial Performance

Closed in FY2023

Duration / Status

Construction has started on all three segments and is expected to be completed by the end of 2025.

  • SBCAG, the metropolitan planning organization for the Santa Barbara area, was the borrower for the TIFIA loan.
  • SBCAG secured the TIFIA loan with revenues from Measure A, a 0.5-percent sales tax that was approved by Santa Barbara County voters in 2008. Measure A will provide more than $1 billion in local sales tax revenues for transportation projects in Santa Barbara County over 30 years (2010 to 2040).
  • The project will be built using the CM/GC delivery method, which will provide beneficial assistance in advancing design, minimizing risks identified during the cost/risk assessment, and completing construction of the project earlier than traditional Design-Bid-Build delivery.
  • The project will create approximately $1.3 billion in total benefits (savings) to the public, commuters, and the freight industry, including $164 million in travel time savings and $834 million in vehicle operational cost savings over the next 20 years.
  • The project will generate as many as 6,000 jobs to assist in the recovery of the State and national economies.


Related Links / Articles

SBCAG project webpage

Caltrans project webpage

SBCAG Measure A webpage

Build America Bureau profile

Build America Bureau press release regarding the TIFIA loan


Joe Erwin, SB 101 Corridor Manager
Caltrans, District 5 - Program/Project Management
Phone: (805) 458 -1829

Sarkes Khachek
Director of Programming
Santa Barbara County Association of Governments
Phone: (805) 961-8900

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