The Marin 101-580 connector project is in the planning phase and the number of alternatives for the undertaking is narrowing.
At a Dec. 13 meeting, the Transportation of Authority of Marin approved moving forward with alternatives 2, 3a, 3b modified and 6, and removing from further consideration alternatives 1a, 1b, 3b, 4 and 5, according to the agency. Sign up for project updates here.
Currently, drivers who wish to access the Richmond-San Rafael Bridge (I-580) via northbound US-101 have to exit the freeway and travel on East Sir Francis Drake Boulevard or across Bellam Boulevard to the bridge entrance. Having to drive on local streets causes congestion and traffic delays on northbound US 101 and on local streets, including Sir Francis Drake Boulevard and Bellam Boulevard.
The proposed project will allow vehicles to continue along US-101 northbound onto a new highway connector in San Rafael and merge directly onto I-580 eastbound toward the Richmond-San Rafael Bridge.
Regional Measure 3, approved by Bay Area voters in 2018, is a key source of funding for the proposed project. MTC and TAM are transportation partners.