Marin County/Sonoma County, CA — Officials with Caltrans, the Sonoma County Transportation Authority and the Transportation Authority of Marin held a dual event Wednesday to celebrate the completion of parts of the Marin-Sonoma Narrows project and the start of another phase.
Officials held a groundbreaking ceremony for the start of construction for the realignment and widening of U.S. 101 at San Antonio Creek at the Marin-Sonoma county line. A ribbon-cutting ceremony for the completion of the Petaluma River Bridge and the State Route 116/Lakeville Highway Interchange was also held.
The new phase represents another step toward having 17 miles of continuous carpool lanes through Sonoma and Marin Counties. Carpool lanes will be added, the San Antonio Creek Bridge will be replaced and a section of the highway will be moved out of the floodplain, according to a news release.