What is the newest signed route designation in your state/province/prefecture?

[DevalDragon]

How about this silly KC 110 for Illinois?

[cpzilliacus]

In Maryland there are several few possibilities, all from the State Highway Administration's 2015 Highway Location Reference, though these are not signed as far as I have been able to determine.

Anne Arundel County:

Md. 995-A, formerly the easternmost 1/3 of a mile of I-195 entering BWI Airport.

Garrett County:

Md. 948-D, Lower New Germany Road.  Transferred from county  to state maintenance.

Harford County:

Md. 740-B, S. Philadelphia Boulevard — Newly assigned route; service road created parallel  to U.S. 40.

Montgomery County:

All of these were transferred from county maintenance to state maintenance as part of the proposed Purple Line light rail project.

Md. 594-A, Wayne Avenue/E. Wayne Avenue — formerly county-maintained (as are the ones below);
Md. 594-B, Bonifant Street (west);
Md. 594-C, Bonifant Street (east); and
Md. 594-D, Arliss Street

[froggie]

Better question for Maryland would be either A) which is the newest signed route, or B) which is the newest non-suffixed route.  I'd suspect it's MD 200 in both cases.

[SSOWorld]

I-41.  That is all.

[Windfarmer]

I believe the newest signed designation in Kentucky is KY 3552 in Georgetown, which was added in July of this year. I believe the newest bannered route is US 27 Bus., which was added in 2015 as a bypass was built around it.

[NWI_Irish96]

In Indiana, the newest signed state road was State Road 931, former U.S. 31, up in St. Joseph County, signed in 2014.

It's a weird route that starts at the Marshall-St. Joseph County line, and ends up in the South Bend city limits, intersecting State Road 4 along the way.

Another segment of IN 931 was signed in Kokomo when the new routing of US 31 opened there.  931 is still the newest, just not quite that new.

[myosh_tino]

Odd question...  does any other country besides Japan use the term "prefecture"?

[CNGL-Leudimin]

China uses them as their second level division below provinces (although most of them are now Prefecture-level Cities). IIRC in France the Prefectures are the capitals of the departments.

As for newest designations in Aragon, my region, A-1208 and a few A-2xxx were first signed in fall 2014. Google Maps still doesn't show these changes.

[triplemultiplex]

I-41.  That is all.

If someone doesn't like that for the same reason they don't like I-840 as an answer for TN, then I think the next one up would be WI 312 from c. 2005.

[sparker]

Reviving this thread, it's likely that the newest signed-in-the-field highway in CA is the new CA 11 segment eastward from CA 905 and CA 125 near the Otay Mesa border crossing.

[DJDBVT]

For Vermont, it would probably be VT 279.

[Brandon]

How about this silly KC 110 for Illinois?

Nope.  IL-390 beats it.

[froggie]

For Vermont, it would probably be VT 279.

For non-bannered routes, yes.  For bannered routes, it's be ALT TRUCK VT 100 on the Morrisville Bypass, designated a year ago and signed this year.

[roadfro]

For Nevada, it's SR 439 (which serves the Tahoe-Reno Industrial Center in Storey County) which was designated by 2015. The designation was a result of NDOT assuming control of USA Parkway, and fast-tracking its rehabilitation and design-build completion south to US 50 at Silver Springs–the overall arrangement was made as part of the incentive package that enticed Tesla to build their gigafactory out at TRIC.

[DJDBVT]

For non-bannered routes, yes.  For bannered routes, it's be ALT TRUCK VT 100 on the Morrisville Bypass, designated a year ago and signed this year.

Forgot about that one. Haven't been up Morrisville way in a while.

[kkt]

Why does Quincy need to be bypassed?  Sounds like a waste of $$$.

Because Google.
http://www.quincybypass.com/project.php

Google, so fast, so easy, so wrong.  Domain is parked.

[NE2]

You're the slow one.

[The High Plains Traveler]

In Colorado, it's likely CO-21. This is Powers Blvd., an east-side bypass of downtown Colorado Springs, which is being upgraded to freeway. Its improvements have been partially state-funded for years, but about 2010 it received the official state designation when other short state routes in the area were relinquished to the city or county.

Currently, CO-21 has end-to-end termini with CO-83 on the north and CO-16 on the south. On the north, it will be extended to I-25 around the Air Force Academy exit. The south end is not determined. It could return to I-25 south of Fountain, or (I guess) if the area east of Fountain Creek between Fountain and Pueblo is developed over the next 20 years, it could go all the way to Pueblo. Its mileposts are reflective of I-25, probably running from the future north terminus.

[ILRoad55]

How about this silly KC 110 for Illinois?

Nope.  IL-390 beats it.

Even the Algonquin Bypass?

[BrianP]

Better question for Maryland would be either A) which is the newest signed route, or B) which is the newest non-suffixed route.  I'd suspect it's MD 200 in both cases.

Nope.  MD 758 would be the newest signed route. It was added in 2012.
https://www.google.com/maps/@39.1799329,-76.6996991,3a,75y,138.28h,64.3t/data=!3m6!1e1!3m4!1sxvQHrnSTBwxS0BPr6WYxQA!2e0!7i13312!8i6656?hl=en

The newest unsigned and unsuffixed route would be MD 206 Konterra Drive in 2014.   

[mgk920]

I-41.  That is all.

If someone doesn't like that for the same reason they don't like I-840 as an answer for TN, then I think the next one up would be WI 312 from c. 2005.

When were WI 794, WI 241 and WI 341 first marked?

Also, when was WI 119 marked in the field?

Mike

[Brandon]

How about this silly KC 110 for Illinois?

Nope.  IL-390 beats it.

Even the Algonquin Bypass?

That's just a reroute of IL-31.

[Eth]

As near as I can tell, Georgia's newest route is SR 385, designated in either 1992 or 1993 along a portion of former US 23/441/SR 15 near Clarkesville. That seems to be the end of the most recent wave of new numbers, with 383, 384, 387 (now part of SR 6), 388, 515, and 520 all also showing up in the late '80s and early '90s.

Update: this may now no longer be true. According to a post in the Southeast board, it seems that a portion of SR 540 may now be signed. I'll have to go check that out in a couple weeks.