What is the highest numbered Highway in your State?

[andytom]

Idaho:

Highest SR: 200
Highest US: 195
Highest I-: 184

A nice compact bunch.

--Andy

[huskeroadgeek]

Nebraska:
Highest numbered state highway: NE 370
Highest numbered US Highway: US 385
Highest numbered Interstate Highway: I-680
Nebraska generally has low-numbered state highways. Most are 1 and 2 digit numbers, and most 3 digit numbered highways are relatively short and/or of lesser importance. The highest regular number is 137-the only two that exceed that are NE 250, which was numbered that way because it was put into state law, and NE 370 which was numbered to match the Iowa highway that continued across the Missouri River.

[Rover_0]

Utah (Posted):

--Interstate:  I-215
--US:  US-491
--State:  UT-320

Of course, you could say that US-491 is both highest state and US, as US and Interstates are seen as state routes, legislatively.

Unposted, you have some "special interest" routes used to prevent nuclear dumping near the Skull Valley Reservation, UT-900 and UT-901, which are not signed or even paved (and probably won't be anytime soon).

[Ian]

Pennsylvania...

Interstate: I-676
US Highway: US 522
State Highway: PA 999
State Secondary Highway: I am not sure, there could be an SR 9999 somewhere

New Hampshire:

Interstate: I-393
US Highway: US 302
State Highway: NH 286

Maine:

Interstate (signed): I-395
Interstate (unsigned): I-495
US Highway: US 302
State Highway: ME 238

[joseph1723]

In Ontario:

Highest non freeway King's Highway:
ON 169

Highest freeway (400 series) King's Highway:
Posted: ON 427
Unposted: QEW which is apparently ON 451

Highest Secondary Highway:
ON 673

Highest Tertiary Highway:
ON 813 (decommissioned)
ON 811 (current)

There's also some unsigned MTO owned highways and access roads numbered in the 7000s.

[roadfro]

The highest in Nevada:


State Route: SR 895
State Route (pre-1976 renumbering): SR 93 (not accounting for the special numbering of SR 140)

U.S. Route: US 395
Former U.S. Route: US 466

Interstate: I-580
Interstate (signed): I-515

[US71]

What about all those "Airport 980" routes?

I'm not sure if those are state maintained highways or not.  Ditto the Marine Tax roads/

[bugo]

Highest Number or Highest POSTED Number?

Highest posted state route is AR 818

Do you consider Airport 980 a posted state route?  What about Marine Fuel Tax 949?

Highest Interstate is I-540

You forgot about I-555 and 630.

Highest US is US 371

You missed 412 and 425.

[bugo]

The highest state highway in Oklahoma is either 412A, 412B, or 412P, take your pick.  The highest US highway is 412, and the highest Interstate is 444.  Highest signed Interstate is 244.

[national highway 1]

CA
Highest US Route: US 395 (was 466 until 1964)
Highest State Hwy: CA 905, Otay Mesa, San Diego
Highest Interstate: I-980, Oakland

[US71]

Highest Number or Highest POSTED Number?

Highest posted state route is AR 818

Do you consider Airport 980 a posted state route?  What about Marine Fuel Tax 949?

Highest Interstate is I-540

You forgot about I-555 and 630.

Highest US is US 371

You missed 412 and 425.

That's what I get for posting before I'm awake

[Alps]

NJ:  Signed state highway - NJ 495
Unsigned state highway - 700 (NJ Turnpike)
US highway - 322
Interstate - 676
Signed county route - 759 or 760 (Camden)
Unsigned county route - 807 (Middlesex)

[ctsignguy]

Ohio:

Interstate: I 680

US Route: US 422

State Route: Ohio 872

[agentsteel53]

CA
Highest US Route: US 395 (was 466 until 1964)

whoops!  I forgot 395, and put 199 as the highest US route.  395 is not only alive and well, but the most scenic US route in the state!

[mightyace]

Tennessee

Interstate: I- 640 (until/unless TN 840 ever becomes an interstate)

US: 641 (I think)

State: TN 840

Hidden: to the best of my knowledge TN 433 which is the hidden number going with US 64 on the Winchester bypass.

[national highway 1]

AZ
Highest Interstate
Currently:I-40
Former: (unbuilt) I-710 Tucson
Highest US Route
Currently: US 191
Formerly: US 666 (until 1992)
State Hwy
Current: AZ 587
Formerly: (unsigned) AZ 989
(posted) AZ 789 (1956-1965)

[agentsteel53]

Former: (unbuilt) I-710 Tucson

was 710 ever signed?  410 was, so that may have been the highest-ever signed interstate route in AZ.

[Scott5114]

State: 325 (unsuffixed), 412P (suffixed)
US: 412
Interstate: 444

[PAHighways]

State Secondary Highway: I am not sure, there could be an SR 9999 somewhere

The highest possible number is 9499.

[mgk920]

Wisconsin:

Interstate - 894
US - 151
State - 794
County (all lettered) - there is a 'VVV' in Fond du Lac, although there is likely one higher in another county.

Mike

[tdindy88]

Indiana

Interstate: I-865
U.S. Route: US 421
State Route: SR 933

[national highway 1]

Former: (unbuilt) I-710 Tucson

was 710 ever signed?  410 was, so that may have been the highest-ever signed interstate route in AZ.

No, 710 was cancelled by NIMBYs in Tucson.

[froggie]

The highest posted route of any kind in Virginia is SR 10650 in Fairfax County.

There's a SR 10772, but I don't remember where I saw it.  VDOT's traffic log confirms the existence of a SR 10657.

[golden eagle]

In Mississippi:

Interstate: 220
U.S. Hwy: 278
State Hwy: 614 (though I may need to double-check that)

[jdb1234]

In Mississippi:

Interstate: 220
U.S. Hwy: 278
State Hwy: 614 (though I may need to double-check that)

Doesn't US 425 extend into Mississippi?