An interesting sight along Torrey Pines Road in San Diego County: A couple of old postmiles for route "5" are still standing. The font looks somewhat newer than the original postmile style, but this obviously predates the actual construction of I-5 through the area. It also suggests that, despite not being a freeway, the route was signed at least temporarily as I-5.
(https://i.imgur.com/eoaSf3O.jpg)
Quote from: Kniwt on November 26, 2018, 07:45:14 PM
It also suggests that, despite not being a freeway, the route was signed at least temporarily as I-5.
Or as CA 5, just as the same number is assigned to Interstate and non-Interstate parts of a route (like I-15 and CA 15, I-210 and CA 210, I-238 and CA 238).
I don't have historic maps of the area, but could Torrey Pines Rd. have been part of a temporary I-5?
Some parts of Torrey Pines were former US 101, and are now part of San Diego CR S21 (Specifically Torrey Pines Road from Genesee Avenue to the Del Mar city limits). San Diego also has a internal numbered county road system (think routes like SA680), so this could also be a county road. My guess: Either a Temp I-5 that was never removed, or a county road.
My notes at https://www.cahighways.org/countys.html#S21 also show that at one time this was signed as Business Route I-5, so it could date from that signage.
The LRN switched to 5 during the 1964 Highway Renumbering. So even though it was still signed as US 101 it would in theory get postmile paddles with LRN 5 I would assume, the 64 City Insert seems to suggest that was the case:
https://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~239527~5511851:-Verso--State-Highway-Map,-Californ?sort=Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No&qvq=q:caltrans;sort:Pub_List_No_InitialSort%2CPub_Date%2CPub_List_No%2CSeries_No;lc:RUMSEY~8~1&mi=28&trs=86
Quote from: Max Rockatansky on November 26, 2018, 11:44:00 PM
The LRN switched to 5 during the 1964 Highway Renumbering. So even though it was still signed as US 101 it would in theory get postmile paddles with LRN 5 I would assume, the 64 City Insert seems to suggest that was the case:
I'm not doubting it, since that seems to be the most logical explanation ... but were any other postmiles elsewhere in the state ever marked with LRNs instead of sign routes? Maybe this was an exception?
Well, after 1964, all state highways were marked with postmiles reflecting their LRNs, because those were the same as the sign. That was the point of the 1964 renumbering, after all. So all older postmiles that were out there (if there were pre-1964 postmiles -- I don't know) were replaced in 1964, making it logical that the pre-freeway route would have 5 on the postmiles.
Quote from: cahwyguy on November 26, 2018, 08:24:14 PM
San Diego also has a internal numbered county road system (think routes like SA680)
680 was an MPO designation.
It's likely that this was signed as US 101 but postmiled as 5. Much like 105 on SR 42 or 51 on I-80 Bus.
Looks like I-5 bypassed Torrey Pines Road Road by 1967. Every state highwah Map from 64-66 show it signed as US 101/LRN 5.