Highway 1 Corridor Investment Program

Highway 1 Corridor Investment Program

*Public comment period now open for the Draft Environmental Impact Report/Environmental Assessment for the proposed Highway 1 Auxiliary Lane Project from State Park to Bay/Porter. The 45-day public review and comment period is open through Jan. 11, 2021.

Written comments may be submitted by mail to Lara Bertaina, Department of Transportation, 50 Higuera St., San Luis Obispo, CA, or by email to lara.bertaina@dot.ca.gov. All comments must be received by 5 p.m. on Jan. 11, 2021.

A virtual public meeting was held on Dec. 8, 2020 to provide the public with the opportunity to learn more about the project and submit comments before a final design is selected. View the meeting here:



The Santa Cruz County Regional Transportation Commission (RTC), in cooperation with the California Department of Transportation (Caltrans) and the Federal Highway Administration (FHWA), is analyzing alternative investments to relieve congestion on State Route (Highway) 1 in Santa Cruz County. For purposes of environmental analysis, the project is divided into two components:

  • Tier I – A long term, program level analysis for the future of the Highway 1 corridor between Santa Cruz and Aptos. The Tier I concept for the corridor would be built over time through a series of smaller incremental projects (referred to as Tier II projects).
  • Tier II – Project level analysis of a smaller incremental project within the Tier I corridor which would move forward based on available funding. Each of the Tier II projects would have independent utility and benefit to the public and Highway 1 operations.

The first Tier II project currently under review is northbound and southbound auxiliary lanes between 41st Avenue and Soquel Drive and a pedestrian/bicycle overcrossing of Highway 1 at Chanticleer Avenue. Preliminary design and environmental analysis has begun on a second Tier II project for the construction of a pedestrian/bicycle overcrossing of Highway 1 at Mar Vista Drive in Aptos. This project will have a separate environmental document for public review and comment later in 2018.


RTC Contact

Sarah Christensen
Senior Transportation Engineer
(831) 460-3200