With Episode 4.11, our attention turns to Route 13. In this episode, we look at LRN 13, Sign Route 13, and Route 13. LRN 13 was the Sonora and Mono Wagon Road, which became today's Route 219 and Route 108. Sign Route 13 was short-lived, quickly being renumbered as Sign Route 17 and Route 17, and is today's Route 17, I-880, and I-580 N of the Bay Bridge. The post-1964 Route 13 of today runs from Route 61 to Route 61 through Oakland and Berkeley, and is best known as the Warren Freeway and Ashby Blvd. As for Route 61, you'll just have to listen to the episode. Next time: In Ep 4.12, we'll look at Route 14 and the unbuilt freeways of the San Fernando Valley. Lastly, note that in this episode Tom was having microphone trouble, so his sound is a bit off (and I don't know Audacity well enough to fix it).For more information, see the show notes at the episode's forever home at CARouteByRoute.org.