MT: S-375 decommissioned

[the_spui_ninja]

S-375 only appears in signage at the south end from MT 2, and https://app.mdt.mt.gov/routeidtool/ has no evidence that a signed route of S-375 currently exists. I plan to remove this from the HB unless there is substantial outcry.

[Duke87]

I would leave it in - this is another example of MDT inventorying quirk where S-class routes never enter city limits. The entirety of 375 is within Butte city limits, thus none of it is inventoried as S-375, it's U-1807A.

But it's signed as 375 (even if only from one end), and that's what matters.

[the_spui_ninja]

I mean technically S-393 is in Butte city limits because of the city-county consolidation, and it's still well signed. There's also no "C000375A" route ID anymore (e.g. in Belgrade the rerouted section of 290 has a Route ID of C000290A and a department ID of U-603A, the department ID varies but the Route ID stays the same). Moreover, while the southern end is still signed, the northern end has no signage whatsoever, and apparently might have even been in downtown Butte (which is where the route "C001807A" ends, incidentally). It's the uncertainty at the northern end that bothers me, since unlike the unsigned portions of MT 2, there's alternative routes someone could take if they weren't looking at the HB beforehand.

[Duke87]

So I had a chance to dig some more and I now agree with removing it.

A look at historic state maps (check the Butte inset) shows 375 in the 1989-90 map but not in the 1990-91 map.

Wiki says it was decommissioned in 1993 with no specific source but that sort of aligns with what the maps say.

Also, the road log does mention S-393 in spite of it also being entirely within consolidated Butte-Silver Bow County, while making no mention of S-375.

So the south end signage is remnant or erroneously replaced depending on how old it is.


What's also funny here is the north end was clearly assumed when usamts was drafted because... per the historic maps it didn't end at I-90 exit 228, it followed Continental Drive most of the way to downtown.