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The Marin-Sonoma Narrows project will expand the US 101 corridor to six lanes throughout the Narrows, adding High Occupancy Vehicle (HOV) facilities, and updating infrastructure connecting the freeway to local roads. The current construction started in 2011 and is scheduled to be completed in 2016, with future phases to continue as funding becomes available.
Transportation partners for the MSN 101 project include Caltrans, the Federal Highway Administration, Sonoma County Transportation Agency, Transportation Authority of Marin, Metropolitan Transportation Commission, Marin and Sonoma counties, and the cities of Novato and Petaluma.
Projects on this list are divided up by location.
Marin Sonoma Narows Financial Plans (Download 87mb Zip file)