Highway 101 Interchanges & Approaching Roadway Study

Overview

Highway 101 serves as the primary north-south roadway in Marin County. It’s a key link between communities. However, many interchanges along Highway 101 in Marin County are outdated and do not meet current and future transportation needs.

The Transportation Authority of Marin (TAM) is studying twelve Highway 101 interchanges to develop preliminary recommendations on how the interchanges could be made to work better for vehicles, transit, bicyclists, and pedestrians.

The focus of this study is to improve the operation and safety of these interchanges for all users, allowing smoother travel to, from, and across Highway 101 and local roads.

Explore the map to learn more about each interchange

Next Steps

The results of the Highway 101 Interchanges and Approaching Roadway Study shed light on possible ideas to improve the selected interchanges and show what improvements TAM might need to prioritize.

TAM completed an evaluation process of short- and long-term interchange reconstruction concepts to compare how well different ideas for renovating each interchange would perform against each other. Download the Highway 101 Implementation Plan to learn more about the three interchange areas that have been chosen for the first comprehensive multimodal enhancements.

In future phases of the project, TAM will be coordinating with Caltrans, Marin County’s local jurisdictions, transit agencies, and other key stakeholders to come up with equitable strategies on how some improvements could be implemented. TAM will also coordinate with these key stakeholders to identify possible funding sources for the improvements to leverage Marin’s Measure AA sales tax funds.

Click the dropdown box or choose a location on the map to learn more about each interchange.

Click the dropdown box to learn more about each interchange.

Next Steps

The results of the Highway 101 Interchanges and Approaching Roadway Study shed light on possible ideas to improve the selected interchanges and show what improvements TAM might need to prioritize.

In future phases of the project, TAM will be coordinating with Caltrans, Marin County’s cities, local jurisdictions, and other key stakeholders to come up with strategies on how some improvements could be implemented. TAM will also coordinate with these key stakeholders to identify possible funding sources for the improvements.