Caltrans District 4 Marin County Newsletter

Marin Sonoma Narrows B-7 project closer to completion

The Marin-Sonoma Narrows (MSN) B-7 project continues to progress into 2025, leading to High Occupancy Vehicle (HOV) lane completion scheduled for the late summer of 2025.

The project reached more milestones in the past months. The biggest occurred on Thursday, May 15 in preparation for the final construction stage as traffic shifted on Northbound US-101 near San Antonio Road. Traffic now travels on a temporary two-lane alignment with a shoulder. K-rail barriers were moved to allow crews to finalize the median and the northbound alignment.

Upon completion of the Marin Sonoma Narrows project, there will be 52 miles of continuous HOV lanes on US-101 between the Richardson Bay Bridge in Marin County and Windsor in Sonoma County. There will only be one HOV lane in each direction of US-101.

Currently the HOV lanes in Marin and Sonoma counties operate at different times. Now that the gap in the HOV lanes through the Marin Sonoma Narrows will be closed, the hours of operation will need to be revised to ensure consistency.

The new hours will be 5 to 10 a.m. in the mornings and 3 to 7 p.m. in the evenings, Mondays through Fridays.

For more information about the hours, see bit.ly/3HoVfOO

State Route 37 (SR-37) Capital Preventive Maintenance project continues in Novato

State Route 37 (SR-37), which affects all of the North Bay, remains a high priority for Caltrans.

This capital maintenance pavement rehabilitation project involves paving and median barrier work in and near Novato. The project will grind and re-pave the roadway between the Ignacio overhead to the Petaluma River Bridge – a stretch of about three miles.

Lanes have been closed in May and June for median barrier work on Westbound and Eastbound SR-37 as well as some intermittent ramp closures at the Atherton Avenue/SR-37 interchange.

This project has completed curb ramp construction and is going to continue with the median barrier installation in June. After that, crews will move onto concrete barrier transitions located at the SR-37 and US-101 split and at SR-37 and Atherton Avenue.

For more on other SR-37 projects, check out SR37 Corridor Projects | Caltrans.

Caltrans attends town hall meeting in Tiburon to discuss SR-131 Capital Preventive Maintenance Project

A standing-room-only crowd packed the Tiburon Town Hall on Wednesday, June 4 for a special session about the State Route 131 (Tiburon Boulevard) Capital Preventive Maintenance Project.

The session provided an opportunity for residents and elected officials to share feedback following a presentation by Caltrans Deputy District Director for Design Wajahat Nyaz.

Caltrans attended the session (both in-person and online) in collaboration with Marin County Supervisor Stephanie Moulton-Peters to help reach a consensus on the proposed improvements and plan for the next steps.

Nyaz provided details about the project's original scope, which includes pavement rehabilitation, installing bike lanes (Class I, II and IV), upgrading guard rails, ADA curb ramps, pedestrian islands and sidewalks as well as modifying electrical systems, drainage improvements and providing intersection improvements. Additionally, project delivery options were discussed to determine the best approach for moving the project forward.

The CAPM project is currently scheduled to reach full design completion by late summer 2025.

For more on the project, see SR 131 Capital Preventive Maintenance | Caltrans.

Community informed about upcoming Marin City Second Culvert Project

About 30 members of the community (in-person and online) attended a public meeting for the Marin City Second Culvert Project on Wednesday, June 18 at the Marin City Senior Center.

The project on US-101 proposes to build a new drainage system, including a 6-by-4 culvert that will help mitigate flooding in the Marin City area. The location is near Marin City from Donahue Street to 0.3 miles north of Donahue Street.

The culvert would convey stormwater flows from west of US-101 to Richardson Bay in Marin City.

The project would also replace damaged storm drainpipes in the US-101/Donahue Street interchange area and repair uneven pavement on US-101 within the project area.

The community can still submit a comment in writing during the public comment period, from Wednesday, June 4 to Monday, July 7, 2025.

Send by mail to:
Caltrans District 4, Office of Environmental Analysis
ATTN: Christopher Pincetich,
P.O. Box 23660, MS 8B
Oakland, CA 94623-0660

Or by email to
EnvPlanning@MarinCounty.gov

Check out the project website at Marin City Second Culvert Project | Caltrans.

Setting the PACE: Public Affairs Customer Engagement Site is Now Live!

District 4 is proud to announce the launch of our new Customer Service Request (CSR) platform. PACE, the Public Affairs Customer Engagement site, provides a regularly updated breakdown of services requested and rendered across the district.

• The CSR dashboard aims to provide an overview of the responsiveness to maintenance services requested across the nine Bay Area counties.
• The data represented as month-to-date falls within a rolling 30-day Service Level Agreement (SLA) and is updated weekly.
• We strive to close 60% (or more) of all monthly service requests received via the CSR website portal.
• For more information or to leave comments/suggestions, please contact D4CSLTEAM@dot.ca.gov.
• To report a highway issue/problem, please submit a CSR ticket through the Customer Service Request Form.

The Marin County newsletter will be distributed on a regular schedule.

For 24/7 traffic updates, please visit 511.org or https://X.com/511SFBay
For real-time information, please visit Caltrans QuickMap:  https://quickmap.dot.ca.gov

CONTACT:

Marin County Public Information Officers
Matt O’Donnell

North Bay Branch Chief
Vince Jacala

General Information
(510) 286-4444