The road allows drivers traveling between Marin County (to the west) and Solano County (to the north) to bypass central Richmond.
When the state did not implement the plan, local officials assembled $200 million in state and local funds to fund a road largely following the same route as proposed Route 93, which was built in the 1990s.
[2] While it mostly functions as an expressway, parts of Richmond Parkway do not meet state expressway standards.
For this reason, Caltrans has refused to take it over and officially designate it as part of SR 93 until these local officials bring it up to the state's standards.
[2] The entire route is in Contra Costa County.