Interstate/State Route Concurrencies

[bing101]

http://en.wikipedia.org/wiki/Interstate_175

I-175 Florida is Hidden route FL-594

http://en.wikipedia.org/wiki/Interstate_195_%28Florida%29

Also I-195 Florida is Hidden FL-112

[Bickendan]

http://en.wikipedia.org/wiki/Interstate_175

I-175 Florida is Hidden route FL-594

http://en.wikipedia.org/wiki/Interstate_195_%28Florida%29

Also I-195 Florida is Hidden FL-594

Coincidentally, I-5 Oregon has hidden ORE 1*, I-84 -> ORE 2...
Unless the internal number is posted in the wild, they're not really part of this thread's scope (where FL 400 barely makes the cut).

*Internal Highway as opposed to signed Route, like OR 569 (which is ORE 69).

[roadman65]

I-195 in Miami/ Miami Beach is hidden route FL 112, that exists on both ends of it signed, but not signed on the interstate.

That is like I-95 being FL 9 north of Golden Glades and FL 9A south of it.  Also I-4 being FL 400, and I-10 being FL 8.  All FL interstates are unsigned with State Routes even though all have them.

[froggie]

Yes. Florida is one of four states to give state numbers to federal routes (though only Florida and Georgia do it on Interstates). Insert disparaging remark about bling101.

Georgia I was aware of; I'd say Oregon and...?

Hint:  they're all east of the Mississippi and south of the Ohio...

[tidecat]

Alabama and Tennessee?


iPhone

[NE2]

Georgia I was aware of; I'd say Oregon and...?

Alabama, Florida, Georgia, Tennessee. Oregon is a bit different in that every state-maintained signed route has a separate highway number (not counting recent efforts to coordinate the two systems). In the four southeastern states, the unsigned numbers for federal routes are in the same system as the signed state route numbers.

Apropos to the topic, only Florida and Georgia do it for Interstates. Georgia does a one-to-one mapping (e.g. I-75 is SR 401), while Florida tried to use the existing grid, leading to a few state roads that leave the Interstate and become signed (SR 9, SR 400, SR 594, formerly SR 9A around Jax).

[hbelkins]

Confirmed that I-65 and KY 61 do indeed have a concurrency in Louisville. It's basically a bridge over a railroad track.

Page 3 of http://transportation.ky.gov/Planning/SPRS%20Maps/Louisville_city.pdf shows the configuration pretty well.