CA RxR 4.13: Route 14: The Antelope Valley FreewayCA RxR 4.13: Route 14: The Antelope Valley Freeway

July 4, 2026July 4, 2026| DanielDaniel| 0 Comment| 10:10 am

Episode 4.13 continues our exploration of Route 14, picking up from the end of the first segment at I-5, and continuing to the junction with US 395 near Inyokern. As usual, along the way, we explore the history of the route, the conversion to freeway, major projects on the route, and naming along the route. This includes a detailed exploration of the start of the route in the Newhall Pass and Solemint area. It also includes an exploration of the “Aerospace Highway” name, and all the firsts that occurred at Edwards AFB and the test center next to the highway. Ep. 4.13 marks the end of the main episodes of Season 4, although we do have a couple of bonus episodes planned for the season break to tide you over. The first bonus episode, 4.14, covers New Idria Road and Hites Cove Road, which are mining roads in San Benito and Mariposa counties.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.12: Route 14, Route 64, LRN 290: The Valley Freeways that Never HappenedCA RxR 4.12: Route 14, Route 64, LRN 290: The Valley Freeways that Never Happened

June 10, 2026June 10, 2026| DanielDaniel| 0 Comment| 7:43 am

Episode 4.12 starts our exploration of the last route of this season: Route 14. Segment (a) of Route 14 is the unbuilt “Reseda to the Sea” freeway, so we take this opportunity to discuss the unbuilt freeways of the San Fernando Valley: the Reseda Freeway (Route 14), the Whitnall Freeway (Route 64), the Laurel Canyon Freeway (Route 170), and the freeway plans for Sunland Tujunga, the Angeles National Forest (Route 118, Route 122, Route 249), and the plan for the Mulholland Expressway (Route 268). We also discuss LRN 14 (part of US 40) and Sign Route 14 (which became Route 91). We’ll discuss the built portion of Route 14 between I-5 and US 395 in the last official season 4 episode. With respect to Tom’s sound quality: It’s better. Daniel’s mic has an occasional “pop” or “thump” problems; we’ll hopefully fix that in Ep 4.13. We’re also working to line up 2-3 bonus episodes during the season break.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.11: Route 13: Oakland and BerkeleyCA RxR 4.11: Route 13: Oakland and Berkeley

May 14, 2026May 14, 2026| DanielDaniel| 0 Comment| 9:51 am

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).

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.10: Route 12: Into the SierrasCA RxR 4.10: Route 12: Into the Sierras

April 22, 2026April 22, 2026| DanielDaniel| 0 Comment| 12:30 pm

Episode 4.10 concludes our exploration of Route 12 with an exploration of the final section of the route: From Route 99 in Lodi to Route 49 near San Andreas. This is a segment that travels through the foothills of the Sierras, running through Lodi, Lockeford, Clements, Valley Springs, and San Andreas along what was originally LRN 24. We also review LRN 12, which we visited before in our episodes on Route 8, for LRN 12 became I-8 between San Diego and El Centro. In our next episode, our attention turns to Route 13, and includes a discussion of LRN 13, the original Sign Route 13 which was quickly renumbered as Sign Route 17, and today’s Route 13 which runs through Oakland and Berkeley, although the route is unconstructed between the Oakland Airport and I-880.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.09: Route 12: Crossing the WetlandsCA RxR 4.09: Route 12: Crossing the Wetlands

March 31, 2026March 31, 2026| DanielDaniel| 0 Comment| 8:51 am

Episode 4.09 continues our exploration of Route 12 through an exploration of the middle section of the route: From Fairfield/Cordelia through the “Drive to Stay Alive” corridor, on through the wetlands of Rio Vista, and into the central valley and Lodi. We explore the big change in routing that happened in Rio Vista. We also look at some major projects within this segment, as well as some of the interesting names. We also review LRN 12, which we visited before in our episodes on Route 8, for LRN 12 became I-8 between San Diego and El Centro. Our exploration of Route 12 will conclude in Episode 4.10, which will cover Route 12 from Route 99 to the Sierra Foothill and San Andreas, where it meets Route 49.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.08: Route 12: Sonoma and NapaCA RxR 4.08: Route 12: Sonoma and Napa

March 11, 2026March 11, 2026| DanielDaniel| 0 Comment| 6:45 am

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.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.07: Route 11: From Pasadena to the BorderCA RxR 4.07: Route 11: From Pasadena to the Border

February 21, 2026February 21, 2026| DanielDaniel| 0 Comment| 8:01 am

In Episode 4.07, we examine Route 11.  We’ll start by exploring LRN 11, which was essentially the first state highway, running from Sacramento to Placerville, later extended to run from Antioch to the Nevada State Line near Lake Tahoe. Today, it is primarily US 50 with a bit of Route 160. We then the original Sign Route 11, which was LRN 165 and LRN 205, and is today’s Route 110. It was also US 60, and is perhaps better known as the Harbor Freeway and the Pasadena Freeway / Arroyo Seco Parkway. We explore the history and various routings of Sign Route 11, including the history of the Figueroa Tunnels. Lastly, we explore the current Route 11, which is a short route near the Mexico border that connects the San Diego Freeway System (Route 905/Route 125) to the Otay Mesa East port of entry.

On deck: In episode 4.08, we start a three-episode group that will cover Route 12. Route 12 runs from Route 1 near Valley Ford to US 101 and thence to Sonoma area. It then runs through Napa to meet I-80 near Cordelia. That part is episode 4.08. 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.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.06: I-10: San Bernardino FreewayCA RxR 4.06: I-10: San Bernardino Freeway

January 29, 2026January 29, 2026| DanielDaniel| 0 Comment| 6:10 am

Episode 4.06 continues our exploration of Route 10.  Episode 4.05 covered the first segment of Route 10: The Santa Monica Freeway between Route 1 and the I-5/US 101 junction. This episode, 4.06, covers the second segment of Route 10, from US 101 to the Arizona Border. Along the way, we explore the former I-110 segment, Route 10S, and do a deep dive into the US highways that shaped this segment of I-10: US 60, US 70, and US 99. We explore the historical routing of those highways across this segment. We also look at some of the names on the highway, and current projects along the highway.

In the next episode, 4.07, we’ll turn our attention to Route 11. We’ll start by exploring LRN 11, and then look at the original Sign Route 11. This was originally tied closely with the development of US 66, and became today’s Route 110. We’ll also talk about the current Route 11.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.05: I-10: Santa Monica FreewayCA RxR 4.05: I-10: Santa Monica Freeway

January 7, 2026January 7, 2026| DanielDaniel| 0 Comment| 6:04 am

With Episode 4.05, we turn our attention to Route 10. This first episode on Route 10 starts with an exploration of the 10th route (the last ordinal route we’ll do), which was the Emigrant Gap Highway, and became the basis for LRN 37. This became part of the Lincoln Highway, then US 40, and is now part of I-80 from Sacramento to Nevada. We look at LRN 10, which became Route 198 from US 101 near San Lucas to Sequoia National Park. We then explore Sign Route 10 (which we discussed in our episode on I-5 in Los Angeles county), which ran from US 101A to US 101, later becoming Route 42 and US 101 Bypass, and eventually I-105 and I-5. Lastly, we turn to post-1964 Route 10, which is today’s I-10. In this episode, we focus on the first segment:  “From Route 1 in Santa Monica to Route 5 near Seventh Street in Los Angeles”, which is today’s Santa Monica Freeway. We look at its origins as Sign Route 6, which became Sign Route 26 along LRN 173, LRN 166, and LRN 171. We focus on LRN 173 (LRN 166 and LRN 171 were discussed in our episode on I-5 in Los Angeles county, as well as our episode on Route 6), which was Olympic Blvd. We explore the history of the Santa Monica Freeway segment, the experiments tried along this highway, some significant projects along this segment, and some significant names on this segment.

We will complete our exploration of Route 10 in Episode 4.06, which explores the San Bernardino Freeway: Its origins in LRN 26 and LRN 64 and the Ramona Airline. The history and strange intertwinings of the US highways that were signed on Route 10: US 60, US 70, and US 99. The transition to I-10 and the story of Route 10S. Lastly, we’ll cover projects and names on the segment.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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CA RxR 4.04: Route 9: Pre-1964 – Milpitas to Castro ValleyCA RxR 4.04: Route 9: Pre-1964 – Milpitas to Castro Valley

December 19, 2025December 19, 2025| DanielDaniel| 0 Comment| 7:02 am

Episode 4.04 is our second episode exploring Route 9, which in its post-1964 version runs from Santa Cruz to Saratoga and Los Gatos. Before 1964, Route 9 continued N up to the Mountain View area, and then across to Milpitas, and up to the Castro Valley. The previous episode covered post-1964 Route 9 (and the first segment of pre-1964 Sign Route 9) from Santa Cruz to Saratoga and then into Los Gatos, as well as all the 9th State Route and LRN 9. This episode (4.04) covers the pre-1964 Route 9 portions N of Saratoga: Sign Route 9 through Mountain View, Milpitas, and up through Hayward and the Castro Valley. This portion of Sign Route 9 became Route 85, Route 237, Route 17/I-880/I-680 (in portions) and Route 238.  The next pair of episodes will be covering I-10, with episode 4.05 covering the Santa Monica Freeway portion, and episode 4.06 covering the San Bernardino Freeway portion.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

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