Moss Beach Hwy 1 Safety Congestion Project Wrapping Caltrans Environmental Phase, Heading to Design and Right of Way Phase and Public Input on Lights and Roundabout Alternatives

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VIIDEO. From the Midcoast Community Council (MCC) meeting on Wednesday, June 10th, 2026 at 7:00pm, as a hybrid meeting with remote comment.  Agenda. Item #5a: ”County Department of Public Works Update. Speaker: Krzysztof Lisaj, Assistant Director of Public Works Report on current and upcoming County Public Works projects on the Coastside. Desired outcome: Informational.”

San Mateo County Moss Beach State Route 1 Congestion & Safety Improvements Project Page:
Please join our project mailing list to stay up to date.



County of San Mateo Public Works Citizen Request Portal



Build Alternative #1: Roundabouts at Cypress and California and Signal at 16th Street

Build Alternative #2: No Roundabouts. Signals at Cypress, California and 16th Street

Cypress Street Roundabout

California Street Roundabout

16th Street Light

16th Street Roundabout



Moss Beach SR 1 Congestion and Safety Improvements Project – Detailed Overview

Jan 29, 2026. This video provides information on where the Moss Beach Project is located, why it is needed, who is involved in moving it forward, what improvements are being considered, what happens during the project’s environmental phase as required by the California Environmental Quality Act and National Environmental Policy Act, and how to provide feedback. For more information, visit https://www.smcgov.org/planning/moss-…


Detailed Overview and Environmental Phase Background


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

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



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

Caltrans Moss Beach Hwy 1 Safety Congestion Project Heads to Public Comment in 2026 with Build #1 = 2 Roundabouts/ 1 Light + Medians; Build #2 = Lights Only, No Medians ~ Both Connect San Carlos, 16th and 14th; February 9, 2026

San Mateo County Supervisors Endorse $6.7M TA Application for the Moss Beach Hwy 1 Improvements Project; Build Alternatives Come to Public Early 2026 ~ Lights or Roundabouts?; October 1, 2025

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; August 28, 2025

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


More on the MCC on Coastside Buzz



Midcoast Community Council (MCC) Meetings ~ 2nd & 4th Wednesdays @ 7:00pm

The MCC is an elected Municipal Advisory Council to the San Mateo County Board of Supervisors, representing unincorporated Montara, Moss Beach, El Granada, Princeton, and Miramar.

The MCC has at-large elections.

Regular MCC meetings are on the 2nd & 4th Wednesday of the month at 7:00 PM at Granada Community Services District (GCSD) meeting room, 504 Ave Alhambra, third floor, El Granada. 
Meetings are in hybrid format and the public is encouraged to attend remotely. All MCC meetings are open to the public, and are agendized and posted according to the requirements of the Brown Act.

MCC Agendas and Zoom Links
Regular meeting agendas are posted 72 hours in advance.
Special meeting agendas are posted 24 hours in advance.
Comments by email, remotely or in person.

Archived MCC meeting videos on PCTv

Lots and Lots of Documents!   Check out the menu bar.   Thanks to exMCC’s Lisa Ketcham for an incredibly well curated website archive on local planning issues.

Subscribe to MCC agendas via email, send email to MCC-Agendas+subscribe@googlegroups.com

2026 Midcoast Community Councilmembers

Reach Every MCC Councilmember a with one email:
midcoastcommunitycouncil@gmail.com
P.O. Box 248, Moss Beach, CA 94038

Kimberly Williams, Chair – 1st Term Ends: Dec 2026
Email: midcoast.kimberlyw@gmail.com

Scott Bollinger, Vice Chair – 1st Term Ends: Dec 2026
Phone: 650-773-4425
Email: scottbollingerMCC@gmail.com

Claire Toutant, Secretary – 3rd Term Ends: Dec. 2026
Phone: 650-676-5847‬
Email: midcoast.claire@gmail.com

Gus Mattammal, Treasurer – 1st Term Ends: Dec 2026
Phone: 650-451-5335
Email: midcoastgus@gmail.com

Connie Santilli – 1st Term Ends: Dec 2028
Email: mccconnies@gmail.com

Antonio Conte – 1st Term Ends: Dec 2028
Email: aconte.mcc@gmail.com

David Santoro – 1st Term Ends: Dec 2028
Email: Davidmidcoastcc@gmail.com

MCC March 25, 2026 with two new council members. From the left: Antonio Conte, David Santoro, Connie Santilli, Kimberly Williams (Chair), Claire Toutant and Scott Bollinger (Gus Mattamal absent).

Early 2026 MCC. From the left: Gus Mattammal, Connie Santilli,  Kimberly Williams, Claire Toutant and Scott Bollinger.
2025 MCC. From the left: Kevin Sniecinski (resigned), Connie Santilli, Gus Mattammal, Claire Toutant, Kimberly Williams, Scott Bollinger and Chris Rogers (resigned).

San Mateo County Board of Supervisors (BoS) Agendas

The Supervisors meet on the 2nd and 4th Tuesdays of the month at 9:00am, as a hybrid meeting.

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2 thoughts on “Moss Beach Hwy 1 Safety Congestion Project Wrapping Caltrans Environmental Phase, Heading to Design and Right of Way Phase and Public Input on Lights and Roundabout Alternatives

  1. Absolutely support using roundabouts to manage traffic flow here on the coast. I’ve used roundabouts in other states, and in Europe. They are proven to be easy to use, save lives, cost less to maintain, and are better for the environment. And keep traffic flowing!

  2. As a retired deputy who patrolled the coast for may years, I have become an advocate of roundabouts haven seen them in action in other states and California roadways. Traffic lights, controlled intersections stop and impede the flow of traffic while the ’round’ allows the continual flow of traffic, a no brainer. I would hope that the community will support a better highway alternative than the old fashioned traffic signal.

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