Signed Routes that complete a full circle

[hotdogPi]

Interpreting the question differently, NJ 495, which has a helix. It makes a full circle, but the helix is only a small section of the route. Instead of ending at itself, it crosses itself.

[empirestate]

Interpreting the question differently, NJ 495, which has a helix. It makes a full circle, but the helix is only a small section of the route. Instead of ending at itself, it crosses itself.

I believe it's US 441 that does something similar in the Smokies.

[Max Rockatansky]

Interpreting the question differently, NJ 495, which has a helix. It makes a full circle, but the helix is only a small section of the route. Instead of ending at itself, it crosses itself.

I believe it's US 441 that does something similar in the Smokies.

Technically it is the Newfound Gap Road in Great Smoky Mountains National Park:

IMG_7721 by Max Rockatansky, on Flickr

SD 87 does the same thing in Custer State Park.

IMG_5866 by Max Rockatansky, on Flickr

[roadman65]

US 16 Alternate in SD has multiple pigtail crossings.

[JCinSummerfield]

The northern terminus of US-41 is a circle.

[fillup420]

US 16 Alternate in SD has multiple pigtail crossings.

Came here to say US 16A. Hands down the coolest road I have ever driven on.

[wriddle082]

I-695 around Baltimore.

TN-155 completes a full loop around Nashville but only about 3/4 of it is freeway (Briley Parkway).  A segment south of the city runs on a surface street.

The Woodmont Blvd stretch b/w US 70S and US 31 is maintained by Metro Nashville Public Works and has never been a part of TN 155.

As far as I know, there aren't any completely circular marked highways in Tennessee.    Not including the US 441 segment in GSMNP.

[CNGL-Leudimin]

I know of five such loops in Spain:
NA-137 in extreme Northeastern Navarre, touching the French border (in fact OSM shows the road dipping into France three times before finally changing to a French departmental designation, D132). This is the only one I've been through.
CV-223 in Southern Castellon province (the Vuelta passed through there last year).
Ma-2141 in Majorca island.
A-7000 near Malaga does this twice.

As for routes that are themselves full loops, all existing ones in Spain are freeway beltways: BU-30 (around Burgos) M-30 (includes a non-freeway section in its Northern part), M-40 (both around Madrid), and Z-40 (around Zaragoza, also the only full loop I've clinched). Historically C-602 was to be a full ring road around Madrid (the forerunner of present day M-40), however two sections of it were never built.

[Thing 342]

GA-10 Loop, a beltway freeway around Athens
The former GA-120 Loop, a complete loop around Marietta. Was replaced by GA-120 (the southern half; its parent route) and GA-120-A (the northern half).

[roadman65]

US 16 Alternate in SD has multiple pigtail crossings.

Came here to say US 16A. Hands down the coolest road I have ever driven on.

Yes it is.  Through all three tunnels  you see Mount Rushmore as they are carved that way on purpose so it gets framed the same way Pittsburgh's skyline is through the Fort Pitt Tunnel EB on I-376.

[WNYroadgeek]

(I believe) NY 47 was a former example, looping around Rochester using both freeways and surface streets.

I'm quite sure it was a big U. No connection between the north ends.

I was not even alive during the time period when NY 47 existed 
So, I retract my statement.

Though on the subject of Rochester, you do have (well, did until a few years ago, when the eastern portion was removed) NY 940T, aka the Inner Loop.

[empirestate]

(I believe) NY 47 was a former example, looping around Rochester using both freeways and surface streets.

I'm quite sure it was a big U. No connection between the north ends.

I was not even alive during the time period when NY 47 existed 
So, I retract my statement.

Though on the subject of Rochester, you do have (well, did until a few years ago, when the eastern portion was removed) NY 940T, aka the Inner Loop.

No, as far as I know the reference route never comprised the southern leg of the circle (I-490).

[GenExpwy]

(I believe) NY 47 was a former example, looping around Rochester using both freeways and surface streets.

I'm quite sure it was a big U. No connection between the north ends.

I was not even alive during the time period when NY 47 existed 
So, I retract my statement.

Though on the subject of Rochester, you do have (well, did until a few years ago, when the eastern portion was removed) NY 940T, aka the Inner Loop.

No, as far as I know the reference route never comprised the southern leg of the circle (I-490).

I agree that reference route 940T did not overlap I-490, but the signed "Inner Loop" (i.e. the rounded trapezoid) did.
https://www.google.com/maps/@43.1515299,-77.6142222,3a,75y,150.54h,85.54t/data=!3m6!1e1!3m4!1sKFk13Ten6SVNqIkgOViFNg!2e0!7i13312!8i6656

[Avalanchez71]

I-695 around Baltimore.

TN-155 completes a full loop around Nashville but only about 3/4 of it is freeway (Briley Parkway).  A segment south of the city runs on a surface street.

The Woodmont Blvd segment is not a state road.

[hotdogPi]

Yellow Belt and Blue Belt in metro Pittsburgh. Even though they are not numbered, they are still signed routes.

[davewiecking]

Wow! I am surprised no one poked fun at this thread.  Amazing!

OK-happy to help...

What signed routes out there form a complete 360 degree circle?  Obviously this would be something far more common freeway territory with Interstates like I-295 in Jacksonville and I-495 in the D.C.  M-185 on Mackinac Island comes as a state route example of a fully circular route.

I-495, the Capital Beltway.

I could start in Pittsburgh, take the PaTPK to Philly, eventually pickup US 13 and cross the Bay Bridge/Tunnel, go thru Richmond out to I-81, head north and eventually take I-68 to I-79 and wind up back where I started, going 360 degrees around the city on "Signed Routes". Or any number of other similar combinations.

The OP apparently intended to ask about a single signed route doing a 360 (or, to honor The Flying Tomato, a 1440), in which case it could be argued that I-495 thru Maryland, Virginia and DC has counted ONLY SINCE the state-ID'ed interstate signs were replaced with generics.

I'm not sure how to count Baltimore's Beltway; while it is all SIGNED as I-695, a portion of it is actually MD-695.

No matter what, I nominate Indy's I-465.

[empirestate]

(I believe) NY 47 was a former example, looping around Rochester using both freeways and surface streets.

I'm quite sure it was a big U. No connection between the north ends.

I was not even alive during the time period when NY 47 existed 
So, I retract my statement.

Though on the subject of Rochester, you do have (well, did until a few years ago, when the eastern portion was removed) NY 940T, aka the Inner Loop.

No, as far as I know the reference route never comprised the southern leg of the circle (I-490).

I agree that reference route 940T did not overlap I-490, but the signed "Inner Loop" (i.e. the rounded trapezoid) did.
https://www.google.com/maps/@43.1515299,-77.6142222,3a,75y,150.54h,85.54t/data=!3m6!1e1!3m4!1sKFk13Ten6SVNqIkgOViFNg!2e0!7i13312!8i6656

That's right. The confusion is that the two aren't coextensive, along with the fact the 940T isn't a loop, isn't signed, and isn't a "NY" route.

[Ian]

Does QC 132 count?  It loops around and ends at itself in the Gaspé peninsula.  Of course, there is the long tail comprising the rest of the route west to NY.

ME 3 is the same way. Comes onto Mount Desert Island from the northwest, then makes a lasso around the island. The reassurance markers even come with their own generic "ROUTE" banners...


ROUTE 3 by Ian Ligget, on Flickr

[mgk920]

In Wisconsin, Door County 'W' includes a complete 'loop'.

Mike

[Buck87]

Australia's Highway 1

[Max Rockatansky]

Australia's Highway 1

Really that would be something on my bucket list to try to complete.  The amount of terrain that highway traverses is absolutely mind boggling.  Some of those rural distances between services are so beyond anything we experience in North America.

[mrcmc888]

I-695 around Baltimore.

TN-155 completes a full loop around Nashville but only about 3/4 of it is freeway (Briley Parkway).  A segment south of the city runs on a surface street.

The Woodmont Blvd stretch b/w US 70S and US 31 is maintained by Metro Nashville Public Works and has never been a part of TN 155.

As far as I know, there aren't any completely circular marked highways in Tennessee.    Not including the US 441 segment in GSMNP.

Both Google Maps and Wikipedia show Woodmont Boulevard as being part of TN-155.

[CNGL-Leudimin]

Australia's Highway 1

Its route is somewhat weird: It runs from Darwin to Katherine in the Northern Territory, then does a full loop around Australia before ending at itself in Katherine. It also has a section in Tasmania from Burnie to Hobart (although the ferry connecting this section to the rest of the road at Melbourne departs from Devonport, not Burnie).

In the same vein: Iceland's Route 1. And this is a true loop, unlike the Australian route.

[US 81]

Columbus, Ohio has I-270.  San Antonio, Texas has I-410.  Kansas City has I-435.  Indianapolis has I-465.  I-465 used to also encompass the northwest stub currently known as I-865, so at one point, it revolved around the city for even more than 360 degrees. 

Texas has many routes that complete a circle

Take a look at the Texas "loop" routes https://en.wikipedia.org/wiki/List_of_state_highway_loops_in_Texas

Texas terminology usually identifies loops as highways that connect other routes OR a route that departs from and returns to the same highway, in the sense of a business loop. Most of these are not circular but form a narrow ellipse with another route; many form line segments rather than loops.  Of the Wikipedia list, most fall into this non-circular class. I count 18 that as listed as beltways, but even a few of these do not form complete loops.

The former Loop 8 is called and signed Beltway 8; some might consider it to be a full loop but it is problematic: in several areas Beltway 8 is signed only on the discontinuous access/frontage/service roads of named tollways. [IIRC the Ship Channel Bridge is not officially considered part of Beltway 8 either.]

Loop 485 only goes around the southern half of Gladewater.

Loop 564 is incomplete, with no southwest segment to complete the loop around Mineola.

Loops 7, 12, 244, 286, 287, 289, 304, 323, 335, 336, 338, 363, and 1604 are signed as and form complete loops as I understand the OP refers to.

There are also many loop roads around various cities and towns that form circles but that do not have a single official number/designation. An earlier poster was correct in saying that I-820 does not form a complete loop around Ft. Worth because the southern segment is I-20, but a complete freeway loop exists, just with two numbers; similar situation in Dallas formed by I-20, I-635, and PGBT as well as I-20, I-635, Loop 12 and Spur 408. Houston and San Antonio have the good sense to designate complete interstate loops.

My sister says that Austinites refer to Loop 1 as "Mopac," but that many poke fun at the signage by calling it "Straight Line One."

[Roadgeekteen]

Texas seems to have an unusual amount of these.