County Planner Explains How Moss Beach Hwy 1 Safety Congestion Project’s Environmental Phase Leads to Draft Document Exploring Impacts for both Lights and Roundabouts, to Help Public Choose

Getting your Trinity Audio player ready...

VIDEO. From the Midcoast Community Council (MCC) meeting on Wednesday, March 25th, 2026 at 7:00pm, as a hybrid meeting with remote comment.  Agenda. San Mateo County Senior Transportation Planner, Chanda Singh, presents.


PRESS RELEASE and VIDEOS. From San Mateo County and Planning on February 4th, 2026.

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

Build Alternative #2: No Roundabouts, Signals Only, No Medians

Both alternatives connect to Moss Beach’s Carlos Street with Montara’s 16th and 14th Streets.

Timeline:
2026: Public Outreach for Phase 2
2026-2029: Design and Right of Way
2030-2032: Construction (more funding needed)

The County is pleased to share that the Moss Beach State Route 1 Congestion and Safety Improvements Project continues to advance through the Caltrans Project Development Process. The Moss Beach Project will improve safety, access, and operations for all roadway users on Highway 1 from about 14th Street to Marine Boulevard.

The County, San Mateo County Transportation Authority, and Caltrans completed Phase 1 of the project in 2024. Since then, we have been working on Phase 2, which includes identifying environmental impacts of the project on topics like traffic safety and operations, animals and plants, noise, water and others, to comply with the California Environmental Quality Act and National Environmental Policy Act.

We have posted new videos to the webpage, including a quick overview of the project, features of the two Build Alternatives under study, and to explain what happens during the current environmental phase. Per Phase 1, Build Alternative 1 includes roundabouts at the intersection of Cypress Avenue and California Avenue and a traffic signal at 16th Street. Build Alternative 2 includes traffic signals at all three locations. Both alternatives include new pedestrian, bicycle and transit improvements.

Later this year, we’ll release the project’s draft environmental document and hold a public meeting. Thank you for staying engaged as the project progresses. We encourage you to share this message with other interested stakeholders and visit the webpage to learn more about the project, sign up for updates, and submit questions or comments.

This project is made possible by local transportation sales tax dollars provided by the San Mateo County Transportation Authority.



Please join our project mailing list to stay up to date.

Past Public Engagement
San Mateo County Bicycle and Pedestrian Advisory Committee, December 18, 2025 
San Mateo County Transportation Authority Board of Directors, December 4, 2025 
San Mateo County Transportation Authority Community Advisory Committee (CAC), December 2, 2025 
C/CAG Bicycle and Pedestrian Advisory Committee, September 25, 2025 
Midcoast Community Council, October 11, 2023
Presentation and Community Open House, September 19, 2023
Midcoast Community Council, November 30, 2022Please join our project mailing list below to stay up to date.


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;

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.

mdrag
Author: mdrag

x