I was noticing that in my state when a road changes jurisdiction takes place causing route numbers to be transferred rred or renumbered, the official change must be recorded.
That makes me wonder why Michicgan took a few years to sign US 127 in place of US 27 north of Lansing.
I would assume that all states do this as official changes have to be backed someplace. So each county must retain a copy in their records beaureau.
Kentucky maintains a list by county on this site:
https://transportation.ky.gov/Planning/Pages/State-Primary-Road-System.aspx
In California the state routes are legislatively defined. I would say that the current post-1964 system has done more long term harm than good. When legislative routes were around at least the State Sign Route weren't fully beholden to being posted on Division of Highways maintained roads.
There are some state routes in California which are legislatively zombies. They have been fully relinquished in field but the legislative definitions were never actually deleted because nobody thought to get a bill in front of the state senate. CA 225 comes to mind off the top of my head as an example.
In New York, when roads are transferred from state jurisdiction to local jurisdiction, it becomes effective with an issuance of an official order from an Assistance Commissioner sent to the relevant parties in NYSDOT and the municipality.
Transfers of jurisdiction are generally filed with the government like deeds. Renumberings are not.
Quote from: Max Rockatansky on May 04, 2026, 04:20:51 PMIn California the state routes are legislatively defined. I would say that the current post-1964 system has done more long term harm than good. When legislative routes were around at least the State Sign Route weren't fully beholden to being posted on Division of Highways maintained roads.
There are some state routes in California which are legislatively zombies. They have been fully relinquished in field but the legislative definitions were never actually deleted because nobody thought to get a bill in front of the state senate. CA 225 comes to mind off the top of my head as an example.
CA 42 is still well signed for a deleted route.