CA RxR 4.08: Route 12: Sonoma and Napa

[cahwyguy]

Episode 4.08 is up, starting our exploration of Route 12. Here's the show description:

Episode 4.08 is the first of three episodes focusing on Route 12. We start by exploring LRN 12, which we visited before in our episodes on Route 8, for LRN 12 became I-8 between San Diego and El Centro. We then look at Sign Route 12 and Route 12, which are mostly the same route... except, of course, in the first segment where they differ in routing between Route 1 and US 101. Episode 4.08 focuses on the first two segments of Route 12, which covers the portions between Route 1 near Valley Ford or Jenner through Sebastapol, Santa Rosa, Sonoma, Napa, and into Cordelia. Episode 4.09 will cover Route 12 from I-80 near Suisan City through the Sacramento Wetlands to Lodi and Route 99. Lastly, Episode 4.10 will cover Route 12 from Route 99 to the Sierra Foothill and San Andreas, where it meets Route 49. As usual, we'll cover historical routings, projects, and names along the route.

On CaRouteByRoute: https://caroutebyroute.org/2026/03/11/ca-rxr-4-08-route-12-sonoma-and-napa/
On Spotify for Creators: https://creators.spotify.com/pod/profile/caroutebyroute/episodes/CA-RxR-4-08-Route-12-Sonoma-and-Napa-e3g9gge/a-ach99nd

As always: Ready, set, discuss.