Lowest numbered route that doesn't exist in your state

[Streetman]

Connecticut has routes bearing every integer from 1 to 12, but no Route 13 perhaps due to superstition. What is the lowest unused route number in your state or province? Would be interesting to see which state has the highest lowest such number.
Interstate, US, state, county routes all count, but not numbered city streets.
Apologies if this has been asked before. I did a search and came up empty.

[Big John]

1, 3, 4, 5, 6, 7, 9 in Wisconsin

[KeithE4Phx]

In Arizona, there are no single digit routes other than Interstate 8, and no double-digit routes lower than 60, other than I-10, I-11 (not yet built), I-15, I-17, I-19, AZ 24, AZ 30 (not yet built)), I-40, and AZ 51.  AZ 48 and AZ 50 were proposed but never commissioned.  County and Indian routes are not included.

[Rothman]

Someone can just check TM and be done with this.

[74/171FAN]

PA's is currently 2.

[oscar]

In Hawaii, 4 (4-10 were reserved for new Interstates, including the very short-lived Interstate H-4 proposal in Honolulu, and a never-built state ferry system).

In Alaska, 12.

In California, decommissioned 21, 30, 31, and 42, and others with higher numbers. As with Arizona, I'm not including Indian and county routes, which Travel Mapping doesn't cover. However, AFAIK there are California county routes 21, 30, 31, and 42, but not 48. US 48 existed in California about a century ago, and there is a proposed CA 48 that seems to be going nowhere. So 48 seems to be the lowest route number now in existence in California.

[TheHighwayMan3561]

MN, decommissioned and not currently in use is 17.

For routes that have never existed, I believe 125.

[MikieTimT]

AR-2 was replaced by US-82 way back in 1932.

Wikipedia is your friend on this one.

[epzik8]

No route 9 in Maryland, although MD 9 was supposed to assume US 140 from Reisterstown to the PA line and even made a state map.

[Hunty2022]

I believe it's 12 for Virginia.

[Great Lakes Roads]

Indiana: 21 (replaced with US 35 and SR 19)
Illinois: 11 (replaced with US 40 and IL-140)
Michigan: 4 (replaced with M-10)

[formulanone]

Alabama: 58, hidden routes aren't counted (they're shown on ALDOT Milepost Maps). SR 58 was decommissioned about 10 years ago.

If hidden route numbers don't count, then 1 is the lowest.

214 has never been used in Alabama for a state route.

Interstate, US, state, county routes all count, but not numbered city streets.

If we're counting county roads, you could probably get to 500 or more.

[MATraveler128]

In Massachusetts it's 17. There is technically a MA 15 but it's unsigned and only runs for 0.2 miles from Rhode Island.

[vdeane]

For NY, assuming we exclude county routes, it's 47.

[NJRoadfan]

For NJ, surprisingly its 2 (NJ-17's previous number). Note that US and Interstates are part of the same numbering system as state highways in NJ, so 1 = US 1.

[Scott5114]

Wikipedia is your friend on this one.

Wikipedia is no roadgeek's friend.

AARoads Wiki is your friend.

[CNGL-Leudimin]

Not counting provincial and other routes, it's 3. In fact 1 is the only number below 116 currently in use as a regional route, and counting national routes 2, 21, 22, 23, 40 and 68 are the only others below 100.

[Mapmikey]

I believe it's 12 for Virginia.

This is currently correct.  Best I can tell, the lowest number never used for a primary route in Virginia is 446.

Currently for SC it is 13.  Best I can tell, the lowest number never used for a primary route in SC is 74.

Currently for NC it is 6.  Best I can tell, the lowest number never used for a primary route in NC is 139.

[Rothman]

Wikipedia is your friend on this one.

Wikipedia is no roadgeek's friend.

AARoads Wiki is your friend.

I hope the copying over from Wikipedia is going well.  Wikipedia's extensive pages on KY's routes are invaluable to roadgeeks.

[hotdogPi]

In Massachusetts it's 17. There is technically a MA 15 but it's unsigned and only runs for 0.2 miles from Rhode Island.

Where is MA 11?

[Rothman]

In Massachusetts it's 17. There is technically a MA 15 but it's unsigned and only runs for 0.2 miles from Rhode Island.

Where is MA 11?

Some of us also remember when MA 15 had an exit on the Turnpike.

[GaryV]

Michigan: 7 (replaced with M-89)

4?

[elsmere241]

Delaware's, I think, is 11.

[74/171FAN]

Delaware's, I think, is 11.

It is 19.  DE 11 does exist.  I do think DE 9 should have been renumbered to DE 19 when US 9 made it to DE.

[JayhawkCO]

No current 4 in Colorado.

Surprisingly, the lowest number to never exist in Colorado is 405. Not counting county routes since I have no idea where to find an inventory of them. Also no national forest roads.