Unused Route Numbers

[papaT10932]

For curiosity's sake:

Are there any three digit numbers that are completely unused as designated routes in the United States? (Whether those routes be county, state, federal or interstate and whether those routes are signed or unsigned).

(I say three digit because I'm assuming that all one and two digit numbers are used)

[ctsignguy]

You would assume incorrectly...

Ohio has the following unused numbers below 100

1 (last used in mid-60s)
69 (Decommissioned in 1969, replaced by Ohio 235)
92 (replaced by Ohio 176)

Ohio has a boatload of currently unused numbers in the 3-di range, some were supplanted by Interstates

[papaT10932]

Sorry if the question wasn't clear. I meant to ask for a number (or numbers) that can not be found anywhere in the US designated as a route number. (not state by state but the US as a whole).

[Mapmikey]

If you include the county numbers, the answer to the 3 digit question is definitely no.  South Carolina has secondary numbers that start from 1 and go continuously into the 2000s.

If you leave those out and go with primary routes, the answer is still very likely no given that Maryland has used all but a couple dozen numbers 1-999; also Kentucky, Florida and Pennsylvania have used many of the 3 digit numbers (if not all) in the upper end.

Given how NC (into the 6000s) and VA (approaching 11000) assign secondary route numbers, there's probably not that many 4-digit numbers that have not been used either (I know for sure not every 9xxx number has been assigned in Virginia).

Mapmikey

[oscar]

If you leave those out and go with primary routes, the answer is still very likely no given that Maryland has used all but a couple dozen numbers 1-999; also Kentucky, Florida and Pennsylvania have used many of the 3 digit numbers (if not all) in the upper end.

PA even has a route 666 (a number often avoided).  VA also has a few secondary state routes numbered 666.

PA has primary routes all the way up to 999, though with gaps.  See the route list at http://cmap.m-plex.com/hb/selecthwys.php?sys=usapa&rg=all&mt=g&gr=p&off=400#r  If there are any unused three-digit route numbers in the U.S. at all, you might want to focus on those gaps.

Hawaii fills in a few of those gaps (750, 804, 930).  Maryland fills in at least 953, 935-937, 925, and 911, just looking at the 9xx numbers.  http://cmap.m-plex.com/hb/selecthwys.php?sys=usamd&rg=all&mt=g&gr=p&off=400#r

[Duke87]

Perhaps a better question would be... what is the lowest unused route number in the US?

If SC has every number up passed 2000 used for secondary routes, then it would have to be at least that high.

[agentsteel53]

Perhaps a better question would be... what is the lowest unused route number in the US?

anyone have a zero?

[mefailenglish]

Missouri?

No, wait, that's O, not 0.

[corco]

anyone have a zero?

There's almost certainly a County Road 0 along a county line somewhere-I'm pretty sure there's several in Eastern Colorado/Kansas/Nebraska Panhandle- whether it is signed or not, I don't know

[Roadgeek Adam]

Oklahoma has an unsigned State Road 0B

[bugo]

Oklahoma has an unsigned State Road 0B

Where?
According to the ODOT control section maps, both the Poteau bypass (inconsistently signed as US 59 Bypass and mainline US 59-271) and the unsigned Duncan bypass are route 00.

[national highway 1]

Arizona has no SR's under 51, but there is to be an AZ 48 bypass around Prescott.

[Scott5114]

Oklahoma has an unsigned State Road 0B

Where?
According to the ODOT control section maps, both the Poteau bypass (inconsistently signed as US 59 Bypass and mainline US 59-271) and the unsigned Duncan bypass are route 00.

Look at your Logan County map.

[Rover_0]

In Utah, SR numbers 1 thru 5 have been unused since 1977, when UDOT used posted sign numbers for legislative route numbers (i.e.:  before 1977, I-15 was UT-1 in the books, since then, it's been seen as UT-15, essentially).  Since then, 1-5 have not been used.

I did email someone at UDOT about the Western Corridor in St. George (kind of an extension of the Southern Parkway), and whether it would be part of UT-7 or carry a new number.  I suggested UT-1, UT-2, UT-3, UT-4, and UT-5, and they said, "[those numbers] used to overlay the Interstates, so those numbers seem unlikely."  Still, I'd love to see a UT-0 come about some day.