Wikipedia:WikiProject U.S. Roads/California/FA/Previous

August 2007
State Route 37 (SR-37) in the northern part of the U.S. State of California runs 21 miles (34 km) along the northern shore of San Pablo Bay. It is currently built from U.S. Route 101 in Novato, through the southern tips of Sonoma and Napa Counties, to Interstate 80 in Vallejo. It serves as a vital connection between the four counties of the North Bay Area, north of San Francisco.