US 101 Santa Maria to San Luis Obispo Multimodal Corridor Plan

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Project Description

This effort developed a comprehensive multimodal corridor plan and concept of operations addressing regional and interregional safety, congestion, accessibility, goods movement, economic development, land use efficiency, public health, air quality, and greenhouse gas emissions for US 101 from State Route (SR) 135 in Santa Maria to SR 58 near Santa Margarita, an overall corridor of about 37 miles. The final product was developed in collaboration with local agency partners and stakeholders. The plan provides a range of proposed concepts, evaluates and prioritizes improvements within the study limits, and sets a solid framework for implementing short- and long-term capital improvements supporting the Road Repair and Accountability Act of 2017 (SB 1) goals and priorities.

What is a Comprehensive Multimodal Corridor Plan?

The 101 MCP is based on the California Transportation Commission’s 2018 Comprehensive Multimodal Corridor Plan Guidelines. This guidance emphasizes a holistic planning approach that strives to achieve a balanced transportation system. In following with the Guidelines, the 101 MCP  aligns with the following priorities:

  • Include local, regional and state agencies in the corridor planning process
  • Balance infrastructure, livability, economic and sustainability
  • Provide multimodal, multidisciplinary corridor-based planning

Project Fact Sheet

Frequently Asked Questions

Corridor Planning Partners

Caltrans began reaching out to our partners in late 2019 to initiate the developing of the plan. We are worked in partnership with the following entities:

  • San Luis Obispo Council of Governments
  • County of San Luis Obispo
  • San Luis Obispo Regional Transportation Authority
  • City of Arroyo Grande
  • City of Grover Beach
  • City of Pismo Beach
  • City of San Luis Obispo
  • Santa Barbara County Association of Governments
  • County of Santa Barbara
  • City of Santa Maria


Kelly McClendon, District 5 Planning


The Completed Plan consists of the Final Report and five appendices:

  • Appendix A – Simulation Model Calibration Report
  • Appendix B – Project List
  • Appendix C – Corridor Congestion Analysis Report
  • Appendix D – Benefit Cost Analysis Report
  • Appendix E – Health Profile

If you would like to request any of these materials please use the contact information above.