List of shortest state highways (done!)

[TheGrassGuy]

* Alabama: AL-151 (0.404 mi)
* Alaska: AK-98 (13.4 mi)
* Arizona: AZ-90 Spur (0.42 mi)
** AZ-24 (1.24 mi) if you only count signed, unbannered routes
* Arkansas: AR-369 (0.18 mi)
* California: CA-225 (0.081 mi)
** CA-77 (0.353 mi) if you only count signed routes
* Colorado: CO-110 (0.19 mi)
** "Signed as CR 110; still a state highway, but is no longer a real part of the state highway system as of November 24, 2006"
** CO-100 (0.41 mi) if CO-110 is not counted
* Connecticut: CT-910 (0.02 mi)
** CT-78 (0.43 mi) if you only count signed routes
* Delaware: DE-491 (0.36 mi)
* Florida: FL-525 (0.101 mi)
** Designation for US-27 NB in Leesburg, unsigned
** FL-61A (0.103 mi) if FL-525 is not counted
** FL-437 (0.106 mi) if you only count signed, unsuffixed routes
* Georgia: GA-260 and GA-274 (tie, 1.2 mi)
* Hawaii: HI-7714 (0.086 mi)
** HI-32A (0.41 mi) if you only count signed routes
** Not sure what the shortest signed, unsuffixed route in Hawaii is
* Idaho: ID-79 (0.257 mi)
** ID-61 (0.740 mi) if you only count signed routes
* Illinois: IL-35 (2.42 mi)
* Indiana: IN-520 (0.248 mi)
* Iowa: IA-903 (0.132 mi)
** IA-165 (0.410 mi) if you only count signed routes
* Kansas: KS-247 (0.123 mi)
* Kentucky: Jeez...
* Louisiana: LA-897-5 (0.05 mi)
** Probably not signed
** LA-1251 is probably not signed either
** In that case, LA-649, LA-824-3, LA-1018-2, and LA-1035-3 (four-way tie, 0.07 mi) take the cake
* Maine: ME-206 (1.6 mi)
* Maryland: MD-939, MD-963, MD-990 (three-way tie, 0.01 mi)
** MD-672 (0.19 mi) if you only count signed routes
* Massachusetts: MA-121A (0.0497 mi)
** New Hampshire state route that juts into Massachusetts a little, but is not signed as a Massachusetts state route... does that count?
** MA-15 (0.23 mi) if MA-121A is not counted
** MA-108 (0.91 mi) if you only count signed routes
* Michigan: M-212 (0.732 mi)
* Minnesota: MN-289 (0.512 mi)
* Mississippi:
* Missouri: MO-117 (0.260 mi)
* Montana: MT-77 (1.991 mi)
* Nebraska: N-110 (2.26 mi)
* Nevada: NV-781 (0.039 mi)
** NV-822 (0.146 mi) if you only count signed routes
* New Hampshire: NH-141 (2.172 mi)
* New Jersey: NJ-59 (0.15 mi)
* New Mexico: NM-446 (0.250 mi)
** Doesn't look signed, judging from Google Street View (albeit quite outdated)
** NM-414 (0.350 mi) if NM-446 is not counted
* New York: NY-437 (0.33 mi)
* North Carolina: NC-400 (0.6 mi)
* North Dakota: ND-91 (0.523 mi)
* Ohio: OH-822 (0.13 mi)
** OH-365 (0.16 mi) if you only count signed routes
* Oklahoma: OK-98S (0.10 mi)
** OK-70D (0.30 mi) if you only count signed routes
** OK-135 (0.4 mi) if you only count unsuffixed routes
** OK-153 (0.47 mi) if you only count signed, unsuffixed routes
* Oregon: OR-422S (0.19 mi)
** OR-52 (1.65 mi) if you only count signed, unsuffixed routes
* Pennsylvania: PA-299 (0.052 mi)
** PA-179 (1.213 mi) if you only count signed routes
* Rhode Island: RI-114A (0.4 mi)
** RI-152 (0.5 mi) if you only count unsuffixed routes
* South Carolina: SC-179 (0.70 mi)
* South Dakota: SD-17 (2.000 mi)
* Tennessee: TN-447 (0.16 mi)
* Texas: TX-165 (0.51 mi)
* Utah: UT-231 (0.085 mi)
** UT-103 (0.225 mi) if you only count signed routes
* Vermont: VT-26 (0.013 mi)
* Virginia: VA-300Y (0.04 mi)
** VA-349 (0.12 mi) if you only count signed routes
* Washington: WA-213 (0.35 mi)
** WA-41 (0.41 mi) if you only count signed routes
* West Virginia: WV-807 (0.35 mi)
** WV-891 (2.29 mi) if you only count signed routes
* Wisconsin: WI-193 (1.42 mi)
* Wyoming: WYO-224 (0.12 mi)
* WYO-175 (0.32 mi) if you only count signed routes

I'm using Wikipedia, by the way. LMK if there are any inaccuracies.

Changelog (10/24/20):
Updated CT, FL, HI, MA, MD, NC, SC, VA

[Max Rockatansky]

For California it's actually presently CA 225 which has 0.091 miles left as part of a State Maintained rail underpass. 

[US 89]

* Idaho: ID-61 (0.740 mi)

This is incorrect: SH 79 is even shorter at 0.257 miles. https://apps.itd.idaho.gov/apps/milepointlog/logs/stateHW/SH_79_MPLog.pdf

It is now unsigned and amounts to little more than the bridge over I-84 at exit 168, but you can't really argue it shouldn't count since it's listed with all the other state routes on ITD's milepoint log page.

[TheGrassGuy]

For California it's actually presently CA 225 which has 0.091 miles left as part of a State Maintained rail underpass.

"Still remains in the route log, as if the entire route was relinquished instead of decommissioned".

As for the underpass thing, [citation needed].

[TheGrassGuy]

* Idaho: ID-61 (0.740 mi)

This is incorrect: SH 79 is even shorter at 0.257 miles. https://apps.itd.idaho.gov/apps/milepointlog/logs/stateHW/SH_79_MPLog.pdf

It is now unsigned and amounts to little more than the bridge over I-84 at exit 168, but you can't really argue it shouldn't count since it's listed with all the other state routes on ITD's milepoint log page.

Fixed.

EDIT: Strange, hunh. Wikipedia says ID-79 is 2.564 miles, which would put it at fifth-shortest in the state.

[US 89]

EDIT: Strange, hunh. Wikipedia says ID-79 is 2.564 miles, which would put it at fifth-shortest in the state.

Wikipoo is wrong. 79 used to go north from I-84 to SH 25 in Jerome, but that road was returned to local jurisdiction several years back. However, the state still maintains the interchange roads, and for whatever reason ITD kept SH 79 around as the designation for the interchange cross-road instead of redesignating it as a ramp.

[TheGrassGuy]

Any Kentuckians or Louisianans here can explain why either of those states have SO MANY FRIGGIN STATE ROUTES?? 

[Max Rockatansky]

For California it's actually presently CA 225 which has 0.091 miles left as part of a State Maintained rail underpass.

"Still remains in the route log, as if the entire route was relinquished instead of decommissioned".

As for the underpass thing, [citation needed].

Still in the Postmile Tool on Castillo Street, I actually have an article about it:

https://www.gribblenation.org/2019/08/california-state-route-225-zombie.html?m=1

For what it's worth just because the California Transportation Commission approved a relinquishment doesn't mean that the localities involved will/have to accept it.  With the underpass on Castillo the City of Santa Barbra apparently didn't want to take it over.  It's just easier to maintain it under Route 225 rather than for Caltrans to swap it to Route 101 spur.  It's actually 0.081 miles and not what I cited above.

As for State Highways that are actually field signed, CA 77 is indeed the shortest in that category.

[TheGrassGuy]

I'm done. Is this accurate?

[hbelkins]

Any Kentuckians or Louisianans here can explain why either of those states have SO MANY FRIGGIN STATE ROUTES?? 

In Kentucky's case, it's because there is only one route numbering system. Virginia probably has more state routes than Kentucky, since nearly every road is state-maintained. Same for West Virginia.

[dfilpus]

* North Carolina: NC-400 (0.6 mi)
** There's no way this is signed
** NC-149 (1.2 mi) if NC-400 is not counted

NC-400 is signed on Fernando Street with an East bannered unisign. The sign is quite faded.

[Dirt Roads]

* North Carolina: NC-400 (0.6 mi)
** There's no way this is signed
** NC-149 (1.2 mi) if NC-400 is not counted

NC-400 is signed on Fernando Street with an East bannered unisign. The sign is quite faded.

Indeed posted.  I've been there several times, but it's been a while.  Brown historical NC-400 markers were posted back in 1985, and perhaps the faded one is original.  Of course, this was the 400th anniversary of the Lost Colony dropped off by Sir Walter Raleigh.  This year, historians formally debunked the Lost Colony concept with proof that some of the remains of the Croatans had Western European DNA.  But early settlers already suspected this, as they had recorded native Americans with light skin and blue eyes when they arrived in the late-1600s.

[Urban Prairie Schooner]

Any Kentuckians or Louisianans here can explain why either of those states have SO MANY FRIGGIN STATE ROUTES?? 

Huey Long says hi.

[Mapmikey]

I'm done. Is this accurate?

I assume you want primary routes with this...

SC 179 (0.9 mi) is the shortest SC route
VA 300Y is 0.04 miles and signed - https://goo.gl/maps/JDHmTKTibTdzNX8M7 
  If you insist on a route signed with the official route marker, then VA 349 at 0.12 miles is I believe it.  VA 353 was once signed when it was only 78 feet long.

NC 400 used to be better posted.  In addition to the brown sign cited there is still a normal NC 400 END assembly at US 64 Bus.


South Carolina would be just like LA and KY except in 1946 they elected to create the secondary highway system (still maintained by the state) instead of 1 primary system to cover any road deemed to be maintained by the state.  Had they not, they would've also needed 4-digit routes eventually as they were almost out of 3 digit routes despite using a crap-ton of ALT designations.

[Scott5114]

OK-98S is unsigned, if it matters. I think the shortest signed route is 40A.

[Ben114]

I wouldn't count MA 15 due to it not being signed. The next shortest would be MA 108 at 0.91 miles.

[pianocello]

* Florida: FL-525 (0.101 mi)
** Designation for US-27 NB in Leesburg, unsigned
** FL-61A (0.103 mi) if FL-525 is not counted
** FL-160 (0.114 mi) if you only count signed, unsuffixed routes
(...)
I'm using Wikipedia, by the way. Lmk if there are any inaccuracies.

SR 437 (0.106 mi, shorter than SR 160) is signed.

I'm not sure if SR 61A is signed, but if it is, I don't think it should be discounted because of its suffix.

[dlsterner]

The three Maryland routes are all unsigned.  And I doubt that it is an exact tie since their length can be expressed as feet.  0.01 mile ≈ 53 feet, but assuming 0.01 is rounded to the nearest hundredth of a mile, could represent anywhere from 26-79 feet.

If you want a signed route, I can suggest MD 911 at 0.21 miles.  Not promising that it is the absolute shortest signed route (not motivated enough to check for sure).

[J3ebrules]

Ah, Jersey. Finished one block of the proposed route, but let it keep its state highway designation and even signed it. Nothing like visible testaments to their own failures 😂😂😂

[DandyDan]

For Nebraska, there are numerous spur and link routes which are shorter than N-110. Some of them are probably not signed, but some are, especially if it's a spur.

[oscar]

* Hawaii: HI-7714 (0.086 mi)

I'm using Wikipedia, by the way. Lmk if there are any inaccuracies.

Shortest signed is HI 32A, 0.41 mi. Shorter unsigned routes include 442 on Lanai (0.03 mi, per the 2012 straight-line diagrams; probably unsigned, but neither I nor GSMV's camera car have been to Lanai lately), and 7401 (0.10 mi., per 2012 SLD).

Wikipedia's list seems to include a lot of unsigned county roads, with numbers assigned only for GIS purposes.

[Mapmikey]

The three Maryland routes are all unsigned.  And I doubt that it is an exact tie since their length can be expressed as feet.  0.01 mile ≈ 53 feet, but assuming 0.01 is rounded to the nearest hundredth of a mile, could represent anywhere from 26-79 feet.

If you want a signed route, I can suggest MD 911 at 0.21 miles.  Not promising that it is the absolute shortest signed route (not motivated enough to check for sure).

MD 672 is slightly shorter at 0.19 miles and although no longer posted at MD 648 it was still posted at the other end as of Aug 2019.

[jp the roadgeek]

CT should have a qualifier for signed routes.  The shortest state route if you count unsigned, numbered state roads is SR 910 in Glastonbury; an extremely short section of Oak St between the CT 2 West off ramp and CT 94.  It is a whopping 0.02 mi. long. There are a couple of others that are in the 0.05-0.06 range.

[ftballfan]

* Florida: FL-525 (0.101 mi)
** Designation for US-27 NB in Leesburg, unsigned
** FL-61A (0.103 mi) if FL-525 is not counted
** FL-160 (0.114 mi) if you only count signed, unsuffixed routes
(...)
I'm using Wikipedia, by the way. Lmk if there are any inaccuracies.

SR 437 (0.106 mi, shorter than SR 160) is signed.

I'm not sure if SR 61A is signed, but if it is, I don't think it should be discounted because of its suffix.

SR 437 appears to be completely concurrent with SR 438

[thefraze_1020]

For Washington, I don't believe SR-41 should count. It is only signed as ID-41, because the very first portion straddles the ID-WA state line, until the road curves into Idaho fully.