I-110 – California Highways: Route by Route

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

February 21, 2026| Daniel| 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:

(more…)

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

January 29, 2026| Daniel| 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:

(more…)

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

January 7, 2026| Daniel| 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 10^th 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:

(more…)

CA RxR 3.11: US 6: A Major Route no MoreCA RxR 3.11: US 6: A Major Route no More

May 23, 2025| Daniel| 0 Comment| 11:44 am

With Episode 3.11, we turn our attention to Route 6, better known as US 6. As is our tradition, we start by looking into the 6^th state highway, and the LRN 6, and then the route that was originally signed as Sign Route 6. We then turn our attention to US 6, looking at the history of the route, and the historical routings in Long Beach, Los Angeles, Newhall, the Antelope Valley, the Eastern Sierras, and Bishop. We also talk about El Camino Sierra, the Midland Trail, and the proposals for trans-Sierra highways that would have included US 6. Lastly, we look at US 6 today: the portion between Bishop and the Nevada State line. Next up: The last episode of Season 3, where we talk about Route 7: both the current short route near the border, and the more interesting historical routings of LRN 7, Sign Route 7, and the original 1964 Route 7.

Here’s the link to the show:

And here’s the link on Spotify for Creators:

(more…)