Moss Beach Hwy 1 Safety and Congestion Improvement Project Continues to Progress as Second Stage of Development Concludes, the Final Stage of Design and Environmental Review Will be Next Step

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VIDEO. From the San Mateo County Planning Commission on Wednesday, August 13th, 2025 at 9:00am, as a hybrid meeting. SMCo Planning Director, Steve Monowitz, reports.

The County of San Mateo is pleased to share updates about the Moss Beach State Route 1 Congestion & Safety Improvements Project (also known as “Moss Beach Corridor Project”).  Sign up for Updates.

Updated: 5/22/2025: The County of San Mateo, San Mateo County Transportation Authority, and Caltrans began the second phase of the Project, Environmental Studies and Project Approval, in June 2024.  The team is currently engaging in data collection and analysis, surveying, and mapping and will host a public workshop in fall 2025.

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San Mateo County Plannning Commission

• Adam Nugent
  1st Term
  Aug 26, 2025 to Dec 31, 2027
  Second District
  
• Andrei Garcia
  1st Term
  Jun 10, 2025 to Dec 31, 2028
  Fourth District
  
• Carlos Serrano-Quan
  2nd Term
  Jan 01, 2025 to Dec 31, 2028
  Fifth District
  
• Kumkum Gupta
  3rd Term
  Jan 01, 2025 to Dec 31, 2028
  First District
  
• VACANCY for Lisa Ketcham
  Third District
  
• Steven Monowitz
  No Term
  N/A N/A
  Planning Director, County of San Mateo

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Project Study Report-Project Development Support, February 28th, 2024

Moss Beach SR-1 Corridor Study History on Midcoast Community Council web site

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More on the Moss Beach Hwy 1 Corridor Study on Coastside Buzz

SMCo and Caltrans Moss Beach Hwy 1 Corridor Congestion Project Environmental Studies and Project Approval Phase in 2025 ~ Roundabouts or Signalized Intersections?; December 24, 2024

San Mateo County Meets with Coastside Fire Protection District to Accommodate Fire Engines for the Two New Moss Beach Corridor Roundabouts; October 3, 2024

San Mateo County Applies for $4M for the Connect the Coastside’s Moss Beach SR-1 Congestion and Safety Improvements Project Environmental Documents; October 19, 2023

Due to CTC/Caltrans 10-15 Year Construction Planning Delay for Traffic Mitigation, Montara GM Demands that San Mateo County Start a 2nd Process to Reduce Speed Limits as Low Cost Solution for Immediate Safety; October 4, 2023

San Mateo County Transportation Authority’s Moss Beach State Route 1 Congestion & Safety Improvements Project Offers 3 Alternatives for Lights, Roundabouts and Medians; September 28, 2023

Midcoast Community Council (MCC) Summer 2022 Newsletter Summarizes ALL Midcoast Transportation Projects Including Project Timelines; August 11, 2022

CalTrans Presentation on Hwy 1 Multi-Asset Roadway Rehabilitation of Pavement, Guard Rails, Bus Stops, Drainage and Cameras; August 4, 2022

Connect the Coastside Moves Forward as San Mateo County Supervisors Approve $100k to Prepare the Midcoastside Transportation Demand Management (TDM) Plan; June 22, 2022

MCC Approves Letter to Apply for $100k Grant to Begin the Transportation Demand Management (TDM) Planning Process Cooperating with City HMB; June 9, 2022

Midcoast Community Council and Connect the Coastside Transportation Study Session; August 6, 2020

Roundabouts? 16th, Cypress, California…..Moss Beach, Montara and HWY 92/35?; February 16, 2020

Moss Beach SR-1 Congestion and Safety Improvements Study Funded by the County Transportation Authority with $1,145,000 in Measure W Funds; Study Starts Spring 2022; January 11, 2022

Crosswalk History in Moss Beach, Montara and Mirada; December 18, 2019

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Project Timeline

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