County of Marin - News Releases - Four Corners Intersection

For Immediate Release
November 17, 2022

Four Corners Intersection Changes Considered

Public meeting December 1 to address circulation and safety at busy junction

San Rafael, CA – The Marin County Department of Public Works (DPW) has been evaluating potential design improvements for the Panoramic Highway / Sequoia Valley Road / Muir Woods Road intersection, also known as Four Corners. The intersection provides access between Highway 101, Shoreline Highway, Mill Valley, and Tam Valley to Muir Woods, Mount Tamalpais, Stinson Beach, and other West Marin destinations frequented by locals and visitors alike.

An online public meeting will be held at 6:30 p.m. Thursday, December 1, to introduce the project. During the virtual meeting, the design team will detail the current conditions of the intersection and discuss the possible design concepts for project. The team will present the alternatives to improve the circulation and safety at the intersection and welcome public comment on the options. Residents can attend the meeting via the invitation link.

Typically, the Four Corners intersection has a daily traffic volume of about 4,100 vehicles during weekdays. That number can swell to over 7,000 vehicles per day on weekends with nice weather. With the goal of improving visibility and functionality for all users, including tourists who may not be familiar with the area, the project will address the configuration of the intersection, including the skewed approaches of the roadways and lane alignments. The number of cyclists and hikers either using or crossing the roadway further emphasizes the multimodal uses and the need to develop a solution that benefits all users. 


For disability accommodations, please phone (415) 473-6358 (voice), CA Relay 711, or e-mail the Public Works staff at least five business days in advance of the event. The County will do its best to fulfill requests received with less than five business days’ notice. Copies of documents are available in alternative formats, upon request.


Julian Kaelon
Public Information Officer
Public Works

3501 Civic Center Drive
San Rafael, CA 94903
(415) 473-4070
CRS Dial 711
Email: Julian Kaelon
DPW Website