Common highway numbers that aren't found in your state

[hbelkins]

No one's going to match Kentucky's four-digit routing system, so I wouldn't expect to see SR 3331 in West Virginia or Ohio.

But what common, lower-number route cannot be found in your state?

Kentucky has no KY 50. At one time, maps indicated KY 50 being signed on what is now US 421 between Frankfort and Lexington, and some state-issued Fayette County maps in the 1980s had KY 50 placed on Man O'War, but Kentucky does not have a route numbered 50. KY 67 was unused for years until it was applied to the Industrial Parkway in northeastern Kentucky.

West Virginia has several route numbers not being used. There's no WV 13. A few other two-digit numbers are reserved for future construction (WV 78 on a route in the Hinton area comes to mind.) And some are county route numbers that cross county lines, such as CR 21 for old US 21 and CR 56 for the old route of WV 56.

[NWI_Irish96]

In Indiana, 21 and 34 don't exist.  They used to, before being replaced by US 35 and 136, respectively, and they were never recycled. Only numbers < 72 in Indiana that aren't on an US or state highway.

[Max Rockatansky]

69 was changed to 245 in California apparently due to sign theft. 

[hotdogPi]

There's no 11 or 17 in Massachusetts, although there used to be.

[GaryV]

After 2 versions of 16 (State and US), Michigan has not had a 16 for decades now.

We have a few more numbers between 10 and 100 that have been discontinued and not used, but not many.

Numbers 1 through 9 were at one time reserved (and any that had existed were renumbered) - they were going to be "super highways" before the advent of the Interstates. But 1, 3, 5, 6 and 8 have now been used.

[TheStranger]

Other California examples of currentlyunused low numbers:

21 - was today's I-680/Route 262 corridor from Fremont to Cordelia from the late 1930s until finally being supplanted in 1976 after 680 took over the last Benicia-Cordelia segment remaining.

30 - 1930s to 1998 route, originally assigned to a corridor between San Dimas and Big Bear Lake/Highland, with the east end being shifted to Redlands in the late 1960s.  Completely subsumed by the state route segment of modern-day 210.

31 - 1964-1974 route between Corona and Ontario, taken over by modern I-15.

42 - 1950s to 2000s route along Manchester and Firestone Boulevards, the west segment of what had been 1934 Route 10.  Primarily replaced by I-105

48 - had been used pre-1964 for the section of today's Route 37 between Sears Point and Vallejo (back when 37 followed modern day 121 north to Napa from Sears Point).  Reserved for a never-built corridor from Route 138/Route 14 west of Lancaster east towards unbuilt Route 122.

64 - reserved for the unbuilt Whitnall Freeway in San Fernando Valley; doesn't appear to have been used pre-1964 either.

81 - reserved for an unbuilt L-shaped north-south freeway from I-15 south of Devore, parallel to Sierra Avenue, to Route 91 west of Riverside, with a final east-west segment to approximately the I-215/Route 60 south split in Moreno Valley.  Number wasn't used pre-1964.

93 is not signed traditionally, but IIRC the callboxes on the Richmond Parkway do have that number identified on them (even though the road is locally built and maintained on the 93 corridor).

[Max Rockatansky]

With Arizona until the Interstate era there wasn't anything below 60 as the State Highways were supposed to be spinoffs of US Routed or child routes of two digit state highways.  Today there are route numbers like; 8, 10, 15, 17, 19, 24, 30 (which is coming), and 40 that are now part of the system.  That still leaves a ton of open slots in the highway network which are typical in other states. 

[Mapmikey]

Virginia has not placed 12 back into service since it was replaced by US 340 in the 1950s

44 is not in use but hasn't been decommissioned that long.

88 is the other 2 digit number not in use but it had briefly been the designation for today's VA 195 Downtown Expressway before they changed it.

[PHLBOS]

In MA, one will not find a Route 45*, 50 & 55 (*MA 45 was renumbered to MA 145 circa 1958).  The supposed reasoning for this was due to the possibility that those route shield reassurance markers, which along non-highways didn't start sporting direction-cardinal banners system-wide until the 1980s, could be mistaken for speed limit signs.

[kphoger]

I don't believe Kansas has ever had a highway numbered 91.  Curious.

[TheHighwayMan3561]

MN has no 17; its most recent form was a short route established to follow a former portion of US 16 likely to meet constitutional route requirements, and later decommissioned. No MN 31 either. Two distinct iterations of MN 66 have come and gone.

WI is obviously infamous for having no state routes lower than 11.

[kphoger]

WI is obviously infamous for having no state routes lower than 11.

Apparently, that's not a well-known fact in these parts.  I didn't know that till you told me just now.

[formulanone]

For Alabama, the lowest missing number under 100 is 58, and that's a recent change. It was part of an old alignment of US 82, but when more of that route was bypassed for an all-new four-lane section, ALDOT just renumbered it SR 382 in 2015. Here's some Junction signage from 2013:



Any other missing numbers in Alabama are US route duplicates or their hidden designations (1-4, 6-8, 12, 15, 16, 38, 42, 57). You will probably find them as a county road numbers in several places in the state, you'd find them somewhere in Alabama.

Florida has a few missing numbers under 100; while we usually know it as having a fairly orderly grid with "bands" of numbers, the SRs 28, 32, 34, 36, 38, 58, 86, 88, 96 are curiously absent. While many routes have changed into county road status since the 1970s to present (for example: 67, 74, 92) those just don't exist anywhere in the state since the 1945 renumbering.

[Big John]

WI is obviously infamous for having no state routes lower than 11.

Then most 2-digit highways including state, US, and Interstate highways are used.  Currently missing are 62, 74, 84, 99

[kphoger]

WI is obviously infamous for having no state routes lower than 11.

Then most 2-digit highways including state, US, and Interstate highways are used.  Currently missing are 62, 74, 84, 99

I do see that Wisconsin has US-2, US-8, and US-10.

[Brandon]

WI is obviously infamous for having no state routes lower than 11.

Then most 2-digit highways including state, US, and Interstate highways are used.  Currently missing are 62, 74, 84, 99

I do see that Wisconsin has US-2, US-8, and US-10.

Yes, Highway 2, Highway 8, and Highway 10. 

[wriddle082]

TN 42 once existed from Sparta to US 127 at the KY border, but has since been renumbered to TN 111.  Pretty sure that's the lowest missing number from TN's system.

HB, did you mention how WV does not have a primary highway 1?

[formulanone]

Remembered this thread from NE2 > Renumbering due to sign theft

[noelbotevera]

Wow, PA is missing a lot of routes under 100. I'm excluding numbers duplicated by US Routes since PA has the no-duplication rule, and all my info is coming from PAHighways.

2 - Replaced by the advent of the US Highway system in 1926, with US 611 and US 11; once stretched from Philly clear up to NY and hasn't been used since.
4 - Also a victim of US Routes; roughly followed what was US 111 and US 15 to go from Maryland to New York.
7 - Also a victim of US Routes - went clear across the state, following the same route as US 6 nowadays
9 - Removed in 1996 following the connection of the Blue Route to the Northeast Extension (or at least I think so); first applied in 1980 to the NE Extension, before then the Extension had no number
37 - No clue why this got renumbered. Happened in the mid 1940's to PA 434; connected US 6 to NY.
47 - Two routes separated by a gap; both met their demise in 1928. It looks like former PA 7 connected them, so when PA 7 was decommissioned so too was PA 47.
55 - Another route separated by a gap, but I can't find any reason why this was decommissioned. US 120 took over the eastern PA 55, so I guess they decided to axe the other one.
57 - Victim of US Routes; connected PA 8 and PA 66, which US 62 now does.
67 - Also separated with a gap, eastern one going to US 106 in 1927 (yet another victim of US Routes). Like 55, no clue why they couldn't keep the western half.
71 - Removed in 1964, being replaced by current I-70 (and parts of I-70 were built as PA 71). Connected US 40 to US 30; more or less followed PA 917, I-70 east of exit 32, and PA 66.
91 - Just as mysterious as the other routes decommed after 1927 (this was decommed in 1946); doesn't seem like it did much, as it was only 11 miles long.

[Konza]

Illinois doesn't have a state route 11; it was usurped by US 40, and hasn't been used since.

Other route numbers <100 not currently assigned to a state, US, or Interstate route in Illinois:  27, 42, 44, 46, 63, 65, 69, 77, 79, 85, 86, 87, 93, 95.

[Flint1979]

There isn't a route 4 of any kind in Michigan. Also no 7 or 9.

[Konza]

With Arizona until the Interstate era there wasn't anything below 60 as the State Highways were supposed to be spinoffs of US Routed or child routes of two digit state highways.  Today there are route numbers like; 8, 10, 15, 17, 19, 24, 30 (which is coming), and 40 that are now part of the system.  That still leaves a ton of open slots in the highway network which are typical in other states.

I believe the only numbers <60 that are currently assigned to state highways are 24 and 51, with, as you mention, 30 to come.

It has always seemed to me that if they wanted a group of 40 highway numbers, they should have opted for 20-59, as the only US or Interstate route in Arizona within that range is I-40.

With certain exceptions (those being routes that were once US Highways or are spurs off of them), they could subtract 40 from every Arizona state route number and not have any issues.

[US 89]

Utah doesn't duplicate numbers, so anything matching an Interstate or US highway doesn't exist. SRs 1 to 5 were used as legislative designations for the five interstate routes before 1977, and none of those have been reassigned since. As for other missing route numbers below 100:

11 - Utah's designation for their portion of US 89A until 2008. Yes, the junction with US 89 in Kanab contained signage for "SR-11 to US-89A".
27 - the pre-1977 legislative designation for US 6, most likely was never signed after the US 6 extension in 1937
33 - became the part of US-191 between Helper and Duchesne
41 - the I-15 Nephi business loop before 2006, became an extension of SR-28
47 - became US-163 from the Arizona line to Monticello, now partly US-191
49 - the old legislative designation for US-89 from Farmington to Ogden, was never signed after the 1938 extension of US-89. There was a SR-49A that existed from 1953 to 1966, though.
69 - renumbered to 38 due to sign theft.
98 - 5500 South in Hooper and Roy, this was combined with SR-97 after its east end was realigned in 2000

[kphoger]

I'm excluding numbers duplicated by US Routes

Why shouldn't we exclude those?  The thread title doesn't specify non-US Routes.  Furthermore, from the OP:  US-50 doesn't exist in Kentucky, and US-13 doesn't exist in West Virginia.

[Eth]

The only number under 100 missing in Georgia is, you guessed it, 69.

The short NC 69 runs south from Hayesville to the Georgia state line, and its continuation into the Peach State kept that same number before ending at US 76. In 1955, GA 17 north of Hiawassee was rerouted; instead of being cosigned with GA 75 to the state line, it now ran west along US 76 and was then cosigned with GA 69 to the state line. By 1960, GA 69 was dropped, leaving its former route as just GA 17, which it remains today (cosigned with GA 515 since 1991).