The Davis Subway, better known to the community as Richards Boulevard Underpass, is listed on the prestigious National Register of Historic Places. The subway, built in 1917, is formed by the last remaining I-beam railroad bridge in use in California. It was constructed as part of the first state highway, State Route 6. Once complete, the highway became an alternate route on the coast-to-coast Lincoln Highway, linking Sacramento to the Bay Area.

From Davis Historic Bike Tour