How recently has a newly designated, signposted route been established in your area? As in "before that date, there was no Route X posted anywhere, but then there was"? Extensions, reroutes etc. do not count; nor do legislative, unposted, "secret" routes.
Connecticut has what seems like a pretty mature system. New unposted routes have been established recently. New alignments of existing routes have opened up. But the most recent New route numbers are CT 130 (designated 1992) and I-291 (portions open, and signed, in 1992).
However, the CT 130 number was used earlier, as was CT 291; so the most recent never-before-used posted route number in CT is CT 244 (Feb. 1, 1988). I have a feeling most other states have something newer. Possibly Alaska wins the "least recent new signposted route" prize in the US?
A 0.63-mile section of the proposed Cross Base Highway (SR 704) was signed in 2009.
In the time since, SR 908 has been removed and SR 527 significantly shortened. Other than that, our state legislature approved a $15 billion works package that will extend a bunch of existing highways, but not create any new ones. It's more likely that some will be removed, like SR 513 in Seattle (which is pretty much useless now).
I believe the one in Nebraska is S-27D, which is the spur which goes into Hooper from US 275. This was created when they built the divided highway south of town and since all towns above a certain size have to be a part of the highway system, they had to build it. I don't remember when it happened, but it was before 2010.
Iowa's is IA 471, which is simply old US 71 between US 20 and IA 175. I think it would have been better to make it an extended IA 39, which currently ends 5 miles to the west on IA 175.
In terms of open to traffic, Ontario's Highway 412 opened in June of this year.
I-840 just changed from SR 840 in Tennessee.
It's not a "route where there never was one before" situation, but Massachusetts's newest route designation is Route 129A in Lynn, which was created in 1995 on a section of former Route 129. This was done as a condition of re-routing Route 129 into the Downtown Lynn area. Both the Route 129 re-routing and the new Route 129A were implemented by MassDPW at the urging of City of Lynn officials and the local legislative delegation. Route 129A was created to appease the local businesses along the section of Route 129 to be relocated after they protested about the plan.
Owing to issues with how the signing changes were implemented, there was a long period of time where Route 129 markers were still in place along the "new" Route 129A. And there's at least one location I'm aware of (the intersection of Eastern Avenue and Western Avenue) where a D6 'paddle' sign still has a Route 129 shield on it to this day. Correction: Per latest GSV, the remaining incorrect D6 signs now have 129A shields - thanks PHLBOS for the info.
QuoteI-840 just changed from SR 840 in Tennessee.
Looking at the OP's criteria, this one wouldn't apply because it was already a Route 840.
Assuming the OP isn't including bannered routes, the latest in Vermont would be VT 279...first segment opened in 2004.
Mike might have a better idea, but I believe Virginia's would be three that happened at once: VA 286, VA 289, and VA 294 were designated in 2012.
I'm pretty sure Minnesota's latest is MN 336, designated ca. 1991.
IL-390 on the Elgin-O'Hare Expressway.
California 905/future I-905 in the late 1980s as a replacement for what had been Route 117 in San Ysidro seems to be the winner out here, as far as newest numbered route to have never been used before to be established. New routes from the 1990s that use older numbers: Route 7 (El Centro) and 11 (Otay Mesa/San Ysidro). 210 extension east of Route 57 might be the newest signed state route technically (dating to 1999) though it is not the establishment of newly defined numbered route.
I'm not sure there are any newly designated state routes since then, with CalTrans's tendency towards relinquishment in the decades since 905 was created.
Quote from: froggie on September 16, 2016, 11:12:50 AM
I'm pretty sure Minnesota's latest is MN 336, designated ca. 1991.
There was MN-312, the temporary designation for the new US-212 freeway, but that one's obviously no longer with us.
New York's would be I-781, then. I-99 was designated more recently, but there had previously been a NY 99.
iPhone
On March 10, 2014, Oklahoma added the SH-351 and SH-364 designations to the existing Muskogee and Creek turnpikes, respectively. Previously, they had no number.
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.
Tennessee had a bunch of former county roads numbered in the 400s that were designated in the past two decades. One of them is SSR 441 in Brentwood, TN. This was a local road that was taken over by the state as th Galleria Mall was built near the Franklin/Brentwood border. Franklin didn't want to help Brentwood expand the road and Brentwood didn't want the road expanded if the mall was to be in Franklin. So then the state ended up expanding the road and solved that crisis.
Quote from: froggie on September 16, 2016, 11:12:50 AM
QuoteI-840 just changed from SR 840 in Tennessee.
Looking at the OP's criteria, this one wouldn't apply because it was already a Route 840.
Assuming the OP isn't including bannered routes, the latest in Vermont would be VT 279...first segment opened in 2004.
Mike might have a better idea, but I believe Virginia's would be three that happened at once: VA 286, VA 289, and VA 294 were designated in 2012.
I'm pretty sure Minnesota's latest is MN 336, designated ca. 1991.
VA-281 appeared sometime after 2013, making it the newest route, as far as I can tell.
US 460 Bus for Grundy is the most recent new designation in Virginia, AFAIK (2014).
North Carolina's is probably NC 906 depending on when US 401 Bus Rolesville actually showed up and whether Future I-42 signs change the answer...
South Carolina is probably these all at the same time: SC 128, SC 281, SC 315
US 641 was extended south over SR 69 from I-40 in Tennessee this year.
Florida's most recent signed state road is probably SR 269, the Quincy bypass (opened January 2015).
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Ffdotwp1.dot.state.fl.us%2Fvideologsource1%2F15350001%2FA50002000N%2FI_00006.jpg&hash=30db3d2434ec23c4f83d817f3aadc38649d32870)
There was formerly a different SR 269, but who cares?
Why does Quincy need to be bypassed? Sounds like a waste of $$$.
Quote from: Avalanchez71 on September 16, 2016, 05:25:07 PM
Why does Quincy need to be bypassed? Sounds like a waste of $$$.
Because Google.
http://www.quincybypass.com/project.php
The Beltline Highway in Eugene, Oregon became OR-569 in 2007. It was slated to be OR-69, numbered after its hidden highway number, but due to concerns over possible sign theft they switched it to OR-569 instead. This change made it Oregon's highest-numbered state route when it was eventually signed in summer 2007.
I think the newest state route in PA is a bannered route, Business PA 8 in Oil City. It was introduced in 2000.
Quote from: empirestate on September 16, 2016, 12:39:04 PM
New York's would be I-781, then. I-99 was designated more recently, but there had previously been a NY 99.
iPhone
What about NY 747?
Quote from: dgolub on September 16, 2016, 07:11:26 PM
Quote from: empirestate on September 16, 2016, 12:39:04 PM
New York's would be I-781, then. I-99 was designated more recently, but there had previously been a NY 99.
iPhone
What about NY 747?
A quick Google search says that it was introduced in 2007. I'd say I-781 is the newest (2012).
Quote from: Mapmikey on September 16, 2016, 03:58:42 PM
US 460 Bus for Grundy is the most recent new designation in Virginia, AFAIK (2014).
I think VA-8 BUS in Stuart might actually be a couple months newer, appearing in either late 2014 or early 2015.
Quote from: empirestate on September 16, 2016, 12:39:04 PM
New York's would be I-781, then. I-99 was designated more recently, but there had previously been a NY 99.
Another interesting bit of perspective here would be that the following designations in New York are all newer than the newest signed designation in Connecticut:
I-99 (2014 in NY, 1998 overall)
I-781 (2012)
NY 185 (2008)
NY 747 (2007)
NY 840 (2005)
NY 598 (2004)
NY 317 (2003)
NY 825 (2002)
NY 631 (1999)
NY 890 (1998)
NY 444 (1997)
The newest designation in New Jersey is NJ 133, which opened in 1999.
Arguably the 'M56 SPUR' designation on driver location signs at J7 that went up a couple of weeks ago.
A2690 (http://www.sabre-roads.org.uk/wiki/index.php?title=A2690) (I think) for an actual route designation on actual direction signs is the most recent, dating from last December. The A5758 (http://www.sabre-roads.org.uk/wiki/index.php?title=A5758) also opened in 2015 on the road (rather than the planners' plan).
I don't think this year would create any new routes, but the 2017 opening of the Dunstable northern bypass looks to be creating the B440 (http://www.sabre-roads.org.uk/wiki/index.php?title=B440) and A5505 (http://www.sabre-roads.org.uk/wiki/index.php?title=A5505).
Quote from: noelbotevera on September 16, 2016, 07:10:17 PM
I think the newest state route in PA is a bannered route, Business PA 8 in Oil City. It was introduced in 2000.
I got PA 576 (https://en.wikipedia.org/wiki/Pennsylvania_Route_576) in October 2006, PA 290 (https://en.wikipedia.org/wiki/Pennsylvania_Route_290) in 2006, and PA 760 (https://en.wikipedia.org/wiki/Pennsylvania_Route_760) in 2009 (replacing the northern part of PA 60 that did not become I-376). (also used PAHighways.com (http://www.pahighways.com/))
US 202 Business (https://en.wikipedia.org/wiki/U.S._Route_202_Business_(Montgomeryville%E2%80%93Doylestown,_Pennsylvania)) in Montgomery and Bucks Counties is probably the newest being posted earlier this year. (using the old US 202 before the 202 Parkway opened in 2012)
For Michigan, it would be M-231, opened on October 30, 2015.
DE 279 (https://en.wikipedia.org/wiki/Delaware_Route_279) was created along the former Elkton Road section of DE 2 back in 2013. It was done in an attempt to make the routing situation in Newark less complicated (despite the fact that signage in town still refers to the original alignment of DE 2 from some 30 years ago).
Quote from: TheStranger on September 16, 2016, 11:56:56 AM
California 905/future I-905 in the late 1980s as a replacement for what had been Route 117 in San Ysidro seems to be the winner out here, as far as newest numbered route to have never been used before to be established. New routes from the 1990s that use older numbers: Route 7 (El Centro) and 11 (Otay Mesa/San Ysidro). 210 extension east of Route 57 might be the newest signed state route technically (dating to 1999) though it is not the establishment of newly defined numbered route.
I'm not sure there are any newly designated state routes since then, with CalTrans's tendency towards relinquishment in the decades since 905 was created.
I think the newest standalone state route designation in California is SR 11 in San Diego. Yes, it is a recycled number, but it is the newest standalone route (not an extension of another route) that I know of. It opened on March 19, 2016. It was planned starting in 1994, but signs didn't go up until this year.
The newest route designation in Wyoming probably is WYO 257, the West Casper Belt Loop.
I'd say I-49 in Missouri. US 71 was officially designated as 49 in 2012.
In Kansas, probably K-12 in '92. It was the last designation of Shawnee Mission Parkway before K-DOT reverted K-12 back to the City of Shawnee.
K-12 was also a destination for K-10 prior to 10 being made into a freeway in the late 70s.
iPhone
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.
Probably Maryland Route 200, the Inter-County Connector, a toll road which I believe was planned decades ago as the "top" portion of an "outer beltway" for DC. The Connector was completed in 2014 with the opening on the link between I-95 and U.S. 1 south of Laurel.
West Virginia's newest signed state route is WV 43, the Mon-Fayette Expressway, from 2011. There are newly constructed sections of the New River Parkway, which will be WV 125, but they aren't signed as such yet.
US 48 was first signed in WV around October 2010 when the section of Corridor H west of Moorefield opened.
For Alabama, SR 382 is the newest designation, as it was placed on US 82's old alignment in Centreville in mid-2015.
SR 605 replaced a county road south of Dothan...which was 3-4 years ago?
I'll take a stab and say in New Jersey it's NJ 133.
Quote from: Zeffy on September 18, 2016, 10:34:49 AM
I'll take a stab and say in New Jersey it's NJ 133.
Correct per Wiki for signed state highways but the AC Expressway Brigantine Connector (Route 446X) was in the mid-2000s and your favorite road, the US 206 Bypass in Hillsborough, was opened in 2013.
New Hampshire's appears to be NH 33, created when NH 101 was re-routed to Hampton in 1994.
Before that, I-393 opened in 1979, and NH 132 was re-numbered from NH 3B at some point in the 80's I believe.
I believe it is Idaho State Highway 167.
Quote from: Thing 342 on September 16, 2016, 07:23:07 PM
Quote from: Mapmikey on September 16, 2016, 03:58:42 PM
US 460 Bus for Grundy is the most recent new designation in Virginia, AFAIK (2014).
I think VA-8 BUS in Stuart might actually be a couple months newer, appearing in either late 2014 or early 2015.
When did current VA 409 appear?
^ Officially designated in 2010. Signed no later than late 2012.
For SD... I'm really not sure. It will be SD 100 (eventually), but that's nowhere near done yet.
Quote from: andy3175 on September 17, 2016, 01:58:51 AM
The newest route designation in Wyoming probably is WYO 257, the West Casper Belt Loop.
For sure, since that was just this past winter. I think the one before that was the Business Route of US 85 in Torrington in 2014 or somewhere thereabouts.
It looks like it's state route 733 for Ohio.
Quote from: roadman on September 16, 2016, 10:25:00 AM
It's not a "route where there never was one before" situation, but Massachusetts's newest route designation is Route 129A in Lynn, which was created in 1995 on a section of former Route 129. This was done as a condition of re-routing Route 129 into the Downtown Lynn area. Both the Route 129 re-routing and the new Route 129A were implemented by MassDPW at the urging of City of Lynn officials and the local legislative delegation. Route 129A was created to appease the local businesses along the section of Route 129 to be relocated after they protested about the plan.
Owing to issues with how the signing changes were implemented, there was a long period of time where Route 129 markers were still in place along the "new" Route 129A. And there's at least one location I'm aware of (the intersection of Eastern Avenue and Western Avenue) where a D6 'paddle' sign still has a Route 129 shield on it to this day.
Good luck to anyone attempting to follow MA 129 in that area between MA 129A's western end (near Wyoma Square) and MA 1A (Broad St.); the near
non-existent signage along that part of 129 has been absolute garbage since day one.
As far as 129 signs still existing near/along 129A are concerned; there are at least two 129 trailblazer assemblies:
along MA 107/Western Ave. Southbound at Waitt St. (https://www.google.com/maps/@42.4843293,-70.9421541,3a,75y,235.45h,74.8t/data=!3m6!1e1!3m4!1sOmXmRa1jWLl_v1aEjU-THw!2e0!7i13312!8i6656)
along MA 1A/Paradise R. Southbound prior to Eastern Ave. (https://www.google.com/maps/@42.4688453,-70.9228866,3a,75y,244.59h,77.84t/data=!3m6!1e1!3m4!1sevb8fJTXMmSS5ROiaji3Yw!2e0!7i13312!8i6656!6m1!1e1)
A bonus - Erroneous
WEST 129A trailblazer sign (https://www.google.com/maps/@42.4686206,-70.923447,3a,75y,175.97h,72.71t/data=!3m6!1e1!3m4!1s4s_Kji5p0JliRC9D8wfN8g!2e0!7i13312!8i6656!6m1!1e1) (should be marked as
EAST 129).
No erroneous LGS' (D6/D8) regarding 129 through Lynn could be found in any current GSVs.
A lot of the 600 series county routes in my area of New Jersey were not signed or rarely signed until in the late 1990s almost all traffic-lit intersections got enhanced blades with both street name and route number on them. The ones I know off the top of my head are Camden County 626, 627, and 604. AFAIK the numbers were always assigned, they were just not signed. I know other counties had them earlier. I don't know if other counties got them even later. If we're talking about completely new routes, the first part of NJ 133 opened in 1999. I assume it was signed as soon as it was opened.
Quote from: Bruce on September 16, 2016, 03:37:25 AM
Other than that, our state legislature approved a $15 billion works package that will extend a bunch of existing highways, but not create any new ones. It's more likely that some will be removed, like SR 513 in Seattle (which is pretty much useless now).
Hey! :no:
Quote from: PHLBOS on September 19, 2016, 02:46:33 PM
Quote from: roadman on September 16, 2016, 10:25:00 AM
It's not a "route where there never was one before" situation, but Massachusetts's newest route designation is Route 129A in Lynn, which was created in 1995 on a section of former Route 129. This was done as a condition of re-routing Route 129 into the Downtown Lynn area. Both the Route 129 re-routing and the new Route 129A were implemented by MassDPW at the urging of City of Lynn officials and the local legislative delegation. Route 129A was created to appease the local businesses along the section of Route 129 to be relocated after they protested about the plan.
Owing to issues with how the signing changes were implemented, there was a long period of time where Route 129 markers were still in place along the "new" Route 129A. And there's at least one location I'm aware of (the intersection of Eastern Avenue and Western Avenue) where a D6 'paddle' sign still has a Route 129 shield on it to this day.
Good luck to anyone attempting to follow MA 129 in that area between MA 129A's western end (near Wyoma Square) and MA 1A (Broad St.); the near non-existent signage along that part of 129 has been absolute garbage since day one.
As far as 129 signs still existing near/along 129A are concerned; there are at least two 129 trailblazer assemblies:
along MA 107/Western Ave. Southbound at Waitt St. (https://www.google.com/maps/@42.4843293,-70.9421541,3a,75y,235.45h,74.8t/data=!3m6!1e1!3m4!1sOmXmRa1jWLl_v1aEjU-THw!2e0!7i13312!8i6656)
along MA 1A/Paradise R. Southbound prior to Eastern Ave. (https://www.google.com/maps/@42.4688453,-70.9228866,3a,75y,244.59h,77.84t/data=!3m6!1e1!3m4!1sevb8fJTXMmSS5ROiaji3Yw!2e0!7i13312!8i6656!6m1!1e1)
A bonus - Erroneous WEST 129A trailblazer sign (https://www.google.com/maps/@42.4686206,-70.923447,3a,75y,175.97h,72.71t/data=!3m6!1e1!3m4!1s4s_Kji5p0JliRC9D8wfN8g!2e0!7i13312!8i6656!6m1!1e1) (should be marked as EAST 129).
No erroneous LGS' (D6/D8) regarding 129 through Lynn could be found in any current GSVs.
21 years later, and they still haven't gotten it right :pan: :pan: :pan:. At least somebody changed the D6 sign at the intersection of Eastern Ave and Western Ave to read 129A.
Quote from: kkt on September 20, 2016, 03:43:54 PM
Quote from: Bruce on September 16, 2016, 03:37:25 AM
Other than that, our state legislature approved a $15 billion works package that will extend a bunch of existing highways, but not create any new ones. It's more likely that some will be removed, like SR 513 in Seattle (which is pretty much useless now).
Hey! :no:
From one useless route to another, we're in need of some trimming. SR 531 doesn't even connect to a state park anymore.
How about this silly KC 110 for Illinois?
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
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.
I-41. That is all.
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.
Quote from: Great Lakes Roads on September 18, 2016, 01:55:26 AM
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.
Odd question... does any other country besides Japan use the term "prefecture"?
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.
Quote from: SSOWorld on October 01, 2016, 12:11:19 PM
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.
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.
For Vermont, it would probably be VT 279.
Quote from: DevalDragon on September 23, 2016, 09:50:13 PM
How about this silly KC 110 for Illinois?
Nope. IL-390 beats it.
Quote from: DJDBVT on November 30, 2016, 08:53:20 PM
For Vermont, it would probably be VT 279.
For non-bannered routes (https://www.aaroads.com/forum/index.php?topic=18830.msg2175226#msg2175226), yes. For bannered routes, it's be ALT TRUCK VT 100 on the Morrisville Bypass, designated a year ago and signed this year.
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.
Quote from: froggie on December 03, 2016, 04:00:08 PM
For non-bannered routes (https://www.aaroads.com/forum/index.php?topic=18830.msg2175226#msg2175226), 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.
Quote from: NE2 on September 16, 2016, 05:29:41 PM
Quote from: Avalanchez71 on September 16, 2016, 05:25:07 PM
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.
You're the slow one.
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.
Quote from: froggie on October 01, 2016, 10:17:37 AM
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.
Quote from: triplemultiplex on October 11, 2016, 11:04:12 PM
Quote from: SSOWorld on October 01, 2016, 12:11:19 PM
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
Quote from: Eth on September 16, 2016, 03:23:18 PM
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 (https://www.aaroads.com/forum/index.php?topic=204.msg2190217#msg2190217), it seems that a portion of SR 540 may now be signed. I'll have to go check that out in a couple weeks.