There's another segment of the Lincoln Hwy signed in the Bay Area. I only saw
this sign, on San Pablo Ave (CA 123) south of Cutting Blvd. I was headed southbound on San Pablo from Crockett, looking for markers for a different route, and this was the only Lincoln Hwy sign I noticed.
Additionally, the Tracy segment of the highway can probably be extended to the roundabout at Grant Line Rd & Business 205 due to
this pair of signs on Grant Line.