Highway 101: Santa Barbara South

Project Overview

Highway 101: Santa Barbara South is located between Olive Mill and Hermosillo Roads. This section includes new carpool lanes, updated safety barriers and freeway lanes, sound walls, and improved on- and off-ramps. Crews have built the new northbound lanes, upgraded the northbound off-ramp at Hermosillo Road, and are currently working on the southbound side of the freeway.

Measure A, Senate Bill 1, and state gas taxes are funding the southern portion of the Santa Barbara segment.

Santa Barbara Phase 4E South Components Map

Updated
November
2025

Roadway Improvements

Project Timeline

Updated
November
2025

The timeline is a reference tool to show planned improvements and key closures. The timing may change to accommodate modifications from the contractor, weather delays, and to improve construction.

Construction is scheduled from late summer 2024 through 2026. Highway 101 will have 2 lanes open in each direction during daytime construction. There will be nighttime lane and ramp closures with signed detours as needed.

Timeline of construction activities for Santa Barbara South
Rendering of Highway 101 from Olive Mill Rd

Highway 101: Carpinteria to Santa Barbara is a project undertaken by Caltrans and SBCAG in cooperation with local agencies to add a new carpool lane in each direction between Carpinteria and Santa Barbara. The project will improve bridges, interchanges, on- and off-ramps, and add sound walls.

City of Carpinteria, California County of Santa Barbara, California City of Santa Barbara, California