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National Boards => General Highway Talk => Topic started by: hotdogPi on January 04, 2014, 09:51:33 PM

Title: Non-freeway beltways
Post by: hotdogPi on January 04, 2014, 09:51:33 PM

An example of what I am talking about is MA 27. It wraps around Boston at a distance of about 20 miles away. It's not that great of an example, but it's the best I can find.
Title: Re: Non-freeway beltways
Post by: hbelkins on January 04, 2014, 10:17:11 PM
Man O'War Boulevard in Lexington, Ky.
Title: Re: Non-freeway beltways
Post by: Charles2 on January 04, 2014, 10:50:20 PM
Ross Clark Circle (AL-210) in Dothan, AL.
Title: Re: Non-freeway beltways
Post by: realjd on January 04, 2014, 11:14:07 PM
Belt Line Road in Dallas
Loop 12 in Dallas (some freeway portions)
Semoran Blvd (SR-436) in Orlando
Coliseum Blvd (SR-930) in Fort Wayne, IN
US-52 in Lafayette, IN
The upcoming Palm Bay Parkway here in Palm Bay, FL http://parkwaypatriots.weebly.com/maps.html
Title: Re: Non-freeway beltways
Post by: Joe The Dragon on January 04, 2014, 11:24:56 PM
Nevada State Route 659
Title: Re: Non-freeway beltways
Post by: SD Mapman on January 05, 2014, 12:02:41 AM
I know Wyoming has a few: WY 258 in Casper, WY 212 in Cheyenne, and WY 376 in Rock Springs.
To SD...
If it doesn't have to go all the way around the city, Elk Vale Road/Catron Boulevard (SD 79 and Truck US 16) would count for Rapid City.
They are also planning to have a bypass around Sioux Falls (SD 100), but I don't know when they'll get to it.
Title: Re: Non-freeway beltways
Post by: Alps on January 05, 2014, 12:56:00 AM
North/East/South Blvd., Montgomery AL
US 202, everything from Wilmington to Portland
Pittsburgh's colored belts
Title: Re: Non-freeway beltways
Post by: Brian556 on January 05, 2014, 01:15:31 AM
SR 155 Nashville TN

Tons in TX:
examples:
LOOP 288 Denton. Partial Arterial, Partial Expy
LOOP 323 Tyler. Arterial.
Title: Re: Non-freeway beltways
Post by: NE2 on January 05, 2014, 01:28:20 AM
Sprawlmoran Boulevard (SR 436).
Title: Re: Non-freeway beltways
Post by: national highway 1 on January 05, 2014, 01:30:58 AM
In London:
The A406 (http://en.wikipedia.org/wiki/North_Circular_Road) and the A205 (http://en.wikipedia.org/wiki/South_Circular_Road).
Title: Re: Non-freeway beltways
Post by: lordsutch on January 05, 2014, 02:00:38 AM
SR 20 in Georgia probably qualifies, although it's only about a 1/2 beltway of Atlanta. The aborted Northern Arc was supposed to at least build a freeway from I-75 to I-85; there's a stopgap set of improvements planned instead, but eventually a freeway (almost certainly a toll road) is probably inevitable.

San Antonio has Loop 1604, which is eventually planned to be a full freeway but is about 70% non-freeway today.  As pointed out above, TxDOT has a lot of loops in a similar boat.
Title: Re: Non-freeway beltways
Post by: lepidopteran on January 05, 2014, 02:30:24 AM
Dayton, OH has a string of several roads that make a partial loop around the city.  The roads have different names, but collectively they have the designation "Wright Brothers Parkway".

Madison, WI has W. Beltline Highway, but a glance at Google Maps suggests it was upgraded to full freeway.  Not sure when this upgrade took place.  Abandonment of at least 2 at-grade RR crossings might have helped.

In Nashville, TN, Briley Parkway (TN-155) is full freeway north of I-40.  South of there, TN-155 becomes an arterial and changes names at least 3 times before returning to freeway form on the other end.

In Lexington, KY, New Circle Rd (KY-4) is about 1/3 non-freeway, specifically in the arc closest to I-75.
Title: Re: Non-freeway beltways
Post by: CNGL-Leudimin on January 05, 2014, 09:01:17 AM
The Rxx series in Belgium. Only those with two digits, the Rx are all freeway-like.
Title: Re: Non-freeway beltways
Post by: mefailenglish on January 05, 2014, 09:42:20 AM
Tallahassee, FL has the Capital Circle, FL 263 on the west side, US 319 on the east side.  But it's only a 3/4 loop; the northern piece is missing.
Title: Re: Non-freeway beltways
Post by: froggie on January 05, 2014, 09:46:24 AM
- VA 262 (the northern half)
- VA 286/Fairfax County Pkwy
- Originally, Military Hwy in the Norfolk/South Hampton Roads area (now US 13 and VA 165) performed a similar function.
Title: Re: Non-freeway beltways
Post by: 1995hoo on January 05, 2014, 10:09:15 AM
–Herndon Parkway around Herndon, Virginia (forms a full ring)

–The unpaved road around the Goshen Scout Camps (reservation east of the town of Goshen owned by the Boy Scouts of America's National Capital Area Council) is called "the beltway" with a lowercase "b." Or at least it was in the 1980s and 1990s.
Title: Re: Non-freeway beltways
Post by: US81 on January 05, 2014, 10:09:41 AM
San Antonio used to have Loop 13. Some of the northern loop was upgraded into I-410; it is still signed and exists as surface streets to the south circling maybe 3/5 of the city.
Title: Re: Non-freeway beltways
Post by: US 41 on January 05, 2014, 10:12:43 AM
TX Rte. 6 in Houston
Title: Re: Non-freeway beltways
Post by: m2tbone on January 05, 2014, 10:19:13 AM
Columbia, MO:  MO-740 (Stadium Blvd.) circles Columbia to the west and south (connecting I-70 to US-63) with future plans to connect back to I-70 in the east.

St. Louis Metro:  MO-141 acts as an outer belt starting at MO-370 northwest of St. Louis and ending just past I-55 south of St. Louis.
Title: Re: Non-freeway beltways
Post by: corco on January 05, 2014, 11:10:26 AM
The Gallatin County Montana outerbelt- starting from I-90, US 89 south to the North Loop Rd in Yellowstone, the North Loop Rd west to US 20, US 20 west to US 287, US 287 north to US 12, US 12 east to US 89, US 89 south to I-90

http://goo.gl/maps/t95Dc
http://goo.gl/maps/3A7BA
Title: Re: Non-freeway beltways
Post by: tchafe1978 on January 05, 2014, 11:14:09 AM
In the Milwaukee area, WI 100 was the original beltway. Probably 75% of it is now one big long commercial strip.
Title: Re: Non-freeway beltways
Post by: dgolub on January 05, 2014, 11:17:01 AM
This probably doesn't count because it's too far away from the city, but NY 28 forms a semicircle around Albany with something like a 50-mile radius.
Title: Re: Non-freeway beltways
Post by: Jardine on January 05, 2014, 11:33:20 AM
Quote from: tchafe1978 on January 05, 2014, 11:14:09 AM
In the Milwaukee area, WI 100 was the original beltway. Probably 75% of it is now one big long commercial strip.

I was in the area around 1980 and it was building up rapidly then.  Hiways can be an engine of economic development.

I recall enjoying driving on the southern strip of 100 and playing Devo's Snowball there on my after market cassette, LOL.
Title: Re: Non-freeway beltways
Post by: vdeane on January 05, 2014, 12:11:10 PM
Winnipeg: TCH 100/MB 101 (although the addition of more and more interchanges is creating short freeway segments)
Title: Re: Non-freeway beltways
Post by: DTComposer on January 05, 2014, 12:50:24 PM
The circa-1960 plan for the Santa Clara Valley included an expressway loop around San Jose. About 21 miles of the 31-mile loop is constructed as expressway (the Montague, San Tomas and Capitol Expressways); the rest is urban arterials (Camden, Hillsdale and Capitol Avenues).
Title: Re: Non-freeway beltways
Post by: Mapmikey on January 05, 2014, 12:57:15 PM
South Carolina has:

Chester bypasses form a near-complete loop (a spiral, really)
SC 16 runs more than halfway around Columbia
SC 118 Aiken is a full loop


Mapmikey
Title: Re: Non-freeway beltways
Post by: US81 on January 05, 2014, 01:23:51 PM
TX 183 around Ft. Worth (sm freeway segment)
Title: Re: Non-freeway beltways
Post by: NE2 on January 05, 2014, 01:26:52 PM
M-185.
Title: Re: Non-freeway beltways
Post by: hbelkins on January 05, 2014, 02:26:04 PM
Quote from: Brian556 on January 05, 2014, 01:15:31 AM
SR 155 Nashville TN

Most of it is freeway.
Title: Re: Non-freeway beltways
Post by: Chris on January 05, 2014, 02:51:10 PM
A108 around Moscow, Russia. It is 560 kilometers long (350 miles).

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FXvPgtPG.png&hash=3952d565001d4431ea7ab89ec54385addcd21ee9)
Title: Re: Non-freeway beltways
Post by: akotchi on January 05, 2014, 03:10:44 PM
NJ 439 and North Ave. form a 3/4 beltway around Elizabeth, NJ.  NJ 81 and the Turnpike complete the loop.
Title: Re: Non-freeway beltways
Post by: agentsteel53 on January 05, 2014, 03:36:20 PM
Moscow: those other two beltways appear to be non-freeway as well.


A108 appears to be the largest beltway so far discussed.  any larger ones?
Title: Re: Non-freeway beltways
Post by: TheStranger on January 05, 2014, 04:05:00 PM
McCarran Boulevard  (NV 659) in Reno is one notable example out west.

Too small to really be a beltway, but there is Grand Boulevard in Corona, CA (which actually inspired the city's name).

Shore Road and Fairview Road serve as a half-beltway of Hollister, CA (bypassing Route 25).

Title: Re: Non-freeway beltways
Post by: cpzilliacus on January 05, 2014, 04:21:03 PM
Helsinki, Finland: Ring I (http://en.wikipedia.org/wiki/Ring_I) and Ring III (http://en.wikipedia.org/wiki/Ring_III) (Ring II (http://en.wikipedia.org/wiki/Keh%C3%A4_II) is not complete).

EDIT:  Ring I is the busiest highway in Finland, AADT exceeding 110,000.  In the U.S. it would be functionally classified as an urban expressway.  Much of Ring III is full motorway, but there are some expressway segments and the westernmost segment is Super-2.

Ring I:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.toward.com%2Fcpz%2Fringi.jpg&hash=56b064b10394228bb8432b94f0f45710ba4ee3ca)

Ring III:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.toward.com%2Fcpz%2Fringiii.jpg&hash=d2319e81e1b692dbbaed7fba90951a5b9bd1744e)
Title: Re: Non-freeway beltways
Post by: JREwing78 on January 05, 2014, 04:57:03 PM
Quote from: lepidopteran on January 05, 2014, 02:30:24 AM
Madison, WI has W. Beltline Highway, but a glance at Google Maps suggests it was upgraded to full freeway.  Not sure when this upgrade took place.  Abandonment of at least 2 at-grade RR crossings might have helped.

The Beltline has been upgraded in bits and pieces since it opened in the 1950's. The railroad crossing just west of Fish Hatchery Rd was removed in 2007, though this was the only at-grade intersection on the highway east of Middleton since the late 1980's.
Title: Re: Non-freeway beltways
Post by: Molandfreak on January 05, 2014, 06:06:40 PM
CSAH 22 makes 3/4 of a beltway around Rochester, MN. It's a divided highway with no interchanges and speed limits of 45-55.
Title: Re: Non-freeway beltways
Post by: FreewayDan on January 05, 2014, 10:50:37 PM
Quote from: US 41 on January 05, 2014, 10:12:43 AM
TX Rte. 6 in Houston

Its longer if you include F.M. 1960.

Add Loop 336 in Conroe to the list as well.
Title: Re: Non-freeway beltways
Post by: PHLBOS on January 06, 2014, 09:07:02 AM
In Bucks County, PA; the Newtown Bypass (which carrys segments of PA 332, 413 & 532).  Those who were at last year's Doylestown Meet ventured on this road.
Newtown Bypass (http://goo.gl/maps/nD3uc)
Title: Re: Non-freeway beltways
Post by: jdb1234 on January 06, 2014, 12:54:27 PM
Boll Weevil Circle - Enterprise, AL
Title: Re: Non-freeway beltways
Post by: Henry on January 06, 2014, 02:32:21 PM
TX 335 in Amarillo
Title: Re: Non-freeway beltways
Post by: Alps on January 06, 2014, 07:06:05 PM
Lansing, MI's Capitol Loop
Title: Re: Non-freeway beltways
Post by: Occidental Tourist on January 06, 2014, 08:52:08 PM
Tramway Rd/Blvd in Albuquerque, NM.  Other roads in the metro area might also qualify (like Coors or Paseo Del Norte), but Tramway, which covers the northeast quadrant, is the most obvious.
Title: Re: Non-freeway beltways
Post by: NE2 on January 07, 2014, 12:20:56 AM
Quote from: Steve on January 06, 2014, 07:06:05 PM
Lansing, MI's Capitol Loop
More of a business route than a beltway.

Providence's Downtown Ring Roads. Pawtucket's Downtown Circulator.
Title: Re: Non-freeway beltways
Post by: Thing 342 on January 07, 2014, 12:30:24 AM
Quote from: agentsteel53 on January 05, 2014, 03:36:20 PM
Moscow: those other two beltways appear to be non-freeway as well.


A108 appears to be the largest beltway so far discussed.  any larger ones?

Moscow actually has 5 coincentric beltways, with the center at the Kremlin.
Title: Re: Non-freeway beltways
Post by: agentsteel53 on January 07, 2014, 09:29:35 AM
I had a dream last night that someone answered my question about beltways larger than Moscow's with "the asteroid belt".

alas, this appears not to have come to pass.

the asteroid belt is, indeed, larger than Moscow's ring road, and is also not a freeway.  just thought I'd throw that out there because I seriously checked this topic this morning wondering if it was something I vaguely remembered.
Title: Re: Non-freeway beltways
Post by: Brandon on January 07, 2014, 10:31:19 AM
Quote from: Steve on January 06, 2014, 07:06:05 PM
Lansing, MI's Capitol Loop

It's not really a beltway.  It's a business loop (BL-496).

Now, Outer Drive and Grand Boulevard in Detroit are examples of older non-freeway beltways.
Title: Re: Non-freeway beltways
Post by: hobsini2 on January 07, 2014, 10:44:51 AM
Some may not look at it as such but Illinois 83 does act as that kind of a bypass around Chicago.

US 151 around Fond du Lac at this time is an at grade bypass.
Title: Re: Non-freeway beltways
Post by: bugo on January 07, 2014, 12:23:32 PM
According to the anal road "geeks" the Creek Turnpike isn't a freeway, so it would count under their rules.
Title: Re: Non-freeway beltways
Post by: NE2 on January 07, 2014, 12:36:10 PM
The Creek Turnpike is neither a creek nor a turnpike. Discuss.
Title: Re: Non-freeway beltways
Post by: corco on January 07, 2014, 12:45:25 PM
If you use a loose definition of Creek that excludes the whole water part and is just a pathway that has the capacity to transport things and can overflow and that has the potential to subtly reshape surrounding topography, then yes, it is a creek.
Title: Re: Non-freeway beltways
Post by: realjd on January 07, 2014, 03:46:59 PM
London's inner Ring Road. Although it's really a collection of existing roads, it's consistently signed Ring Road on guide signs.

Monument Circle in Indianapolis. It's not a freeway and it fully circles the center of the city.

Title: Re: Non-freeway beltways
Post by: brownpelican on January 08, 2014, 01:21:49 AM
Shreveport has La. 526 - Bert Kouns Industrial Loop Expy. - around the south side of town.

Natchitoches has a partial beltway around the north, west and south sides - La. 1/La. 6 bypass.

MacArthur Drive in Alexandria (partial).

Lafayette - Ambassador Caffery Parkway on the west side.

Gonzales - you can form a 3/4 loop with La. 42 from La. 44 to La. 73, 73 from La. 42 to La. 30, then La. 30 from 73 to Airline Hwy/US 61 and finally, La. 431 from Airline to La. 931.

Mobile - Henry Aaron Loop (Broad/Canal/Water Streets)
Title: Re: Non-freeway beltways
Post by: iamathousandapples on January 08, 2014, 01:43:12 AM
Bowling Green, KY has Campbell Ln/Veterans Memorial Ln/Lovers Ln which makes up the inner belt to I-65/Natcher Pkwy(I-66?)'s Outer Belt
Title: Re: Non-freeway beltways
Post by: jp the roadgeek on January 08, 2014, 08:47:37 AM
Hartford has CT 218 which functions as sort of a NW beltway and was widened in the 1980's to 4 lanes in most spots instead of building the I-291 segment from I-84/CT 9 to the present I-291. 
Title: Re: Non-freeway beltways
Post by: theline on January 09, 2014, 12:05:08 AM
Indianapolis once had SR-100. I don't think it ever made a complete loop, though it was close.
Title: Re: Non-freeway beltways
Post by: lordsutch on January 09, 2014, 12:55:42 AM
Quote from: NE2 on January 07, 2014, 12:36:10 PM
The Creek Turnpike is neither a creek nor a turnpike. Discuss.

Duh; it's named after the Creek (aka Muscogee) Native American tribe, originally native to the fall line area of Alabama and Georgia. Who (edging back on-topic) also have a lovely casino off I-65 between Montgomery and Mobile near Atmore, which does not appear to have a beltway (freeway or otherwise).

Even more on-topic, Montgomery does have the West/South/East/North Boulevard almost-beltway abomination, along with AL 271, which bypasses the worst of East Boulevard although probably will be just as bad within the next decade. ALDOT may yet get it right with nu-I-85, sometime after we're all dead.
Title: Re: Non-freeway beltways
Post by: jbnv on February 20, 2014, 04:08:57 AM
You can make a long beltway around San Antonio with (clockwise from 12:00) parts of TX 46, TX 123, US 87, TX 197, TX 16, TX 173 and TX 16 again.
Title: Re: Non-freeway beltways
Post by: on_wisconsin on February 20, 2014, 10:53:50 PM
The North and South circular(s) around in outer London, England.
Title: Re: Non-freeway beltways
Post by: english si on February 21, 2014, 07:53:07 AM
The North Circular is mostly freeway. The South Circular is mostly something to avoid. You are also looking at 2 half belts that meet head end to end, rather than a whole one. No Londoner would ever treat it as one route.
Title: Re: Non-freeway beltways
Post by: PHLBOS on February 21, 2014, 08:43:23 AM
TX (LOOP) 12 in the Dallas area (http://goo.gl/maps/WO9Nk) is rather a mixed-bag of sorts in terms of boulevard, road and freeway segments.
Title: Re: Non-freeway beltways
Post by: NE2 on February 21, 2014, 10:25:59 AM
http://neroute2.blogspot.com/2013/05/the-creation-of-semoran-boulevard.html
Title: Re: Non-freeway beltways
Post by: roadman65 on February 21, 2014, 10:53:43 AM
FL 434 could now be along with FL 423 as you can go between two points on FL 50.  With the John Young Extension completed you can go from the John Young/ SR 50 intersection to the Alafaya Trail/ SR 50 intersection in one half a circle around the city of Orlando.
Title: Re: Non-freeway beltways
Post by: sammi on February 21, 2014, 11:28:44 AM
Manila's circumferential roads? Of course they don't go completely around because the city faces water. All five C- roads are non-freeway. I'm not sure but C-4 might also be freeway in some sections. (C-6, currently under planning, is going to be a full freeway.)

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2Fyc6hL57.png&hash=91f32df5f4eafd2bc34d3daf2b20fb0a481e6db3)

The north-south road in the image is R-1/R-10.
Title: Re: Non-freeway beltways
Post by: roadman65 on February 22, 2014, 10:30:12 AM
Boundary Boulevard in Rotunda West, FL.  Though its incomplete it does form a circle around a bunch of subdivisions with a water tower being its epicenter.  https://maps.google.com/maps?q=Rotonda+West,+FL&hl=en&ll=26.883646,-82.290173&spn=0.033301,0.054073&sll=28.11408,-81.617775&sspn=0.032931,0.054073&oq=rotunda,+fl&t=h&hnear=Rotonda+West,+Charlotte+County,+Florida&z=14

Also Waterbridge Circle in Sky Lakes South in Orlando, Florida.  This is a complete circle and makes a full 360.
https://maps.google.com/maps?q=Pepper+Mill+Boulevard,+Orlando,+FL&hl=en&ll=28.402764,-81.411674&spn=0.008211,0.013518&sll=37.6,-95.665&sspn=30.135852,55.371094&oq=pepp&t=h&hnear=Pepper+Mill+Blvd,+Orlando,+Florida+32837&z=16
These are rare cases not only non freeway, but residential street grades.
Title: Re: Non-freeway beltways
Post by: cwf1701 on February 22, 2014, 08:42:03 PM
Grand Blvd. and Outer Drive In Detroit. both not a full circle due to both roads ending at the Detroit River at both ends.
Title: Re: Non-freeway beltways
Post by: NE2 on February 22, 2014, 09:58:21 PM
OKC used to have a full one, but major parts have been replaced by Interstates.
Title: Re: Non-freeway beltways
Post by: US71 on February 22, 2014, 10:28:15 PM
The original US 71 Bypass at Fayetteville, AR: 2 Lanes, 5 at-grade intersections, 2 railroad crossings. Now mostly part of I-540.
Title: Re: Non-freeway beltways
Post by: Revive 755 on February 22, 2014, 11:35:27 PM
* The Lindbergh Boulevard/Kirkwood Road corridor almost forms a half loop around St. Louis.

* Chesterfield Parkway in Chesterfield, MO, is kind of an arterial beltway/inner loop for the mall area.  Map (https://maps.google.com/maps?hl=en&ll=38.656494,-90.554509&spn=0.029793,0.066047&t=m&z=15)

* MO 47 kind of forms a large half beltway around St. Louis
Title: Re: Non-freeway beltways
Post by: 1995hoo on February 23, 2014, 02:31:21 PM
The Downtown Loop in Durham, North Carolina, forms sort of a beltway around downtown. I always found it to be a nuisance because it was one-way anti-clockwise and intersected a bunch of one-way streets, yet North Carolina doesn't allow left on red (not that I let that stop me 20 years ago.....). The loop also interrupted the logical routing of a lot of other streets. There was never all that much in the immediate downtown area other than a notable bookstore, but there was often reason to pass through.
Title: Re: Non-freeway beltways
Post by: mrsman on March 02, 2014, 07:28:57 AM
Pittsburgh has its color belt system.

http://en.wikipedia.org/wiki/Allegheny_County_belt_system


And Corona, CA has its own Grand Blvd. and its a perfect circle.
Title: Re: Non-freeway beltways
Post by: Chris on March 02, 2014, 01:58:15 PM
The loop around Bitonto, Italy, is perhaps the most perfect circle for a rural road.

(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FlzBR21v.png&hash=e71a85fcb1d9ab4d570a1091d192b76edbafeff9)

It's not entirely complete, there is a short section missing on the eastern side and the western side has a divided highway crossing through, so you can't follow the entire loop there. I don't know what the history behind this loop is.
Title: Re: Non-freeway beltways
Post by: Chris on March 02, 2014, 02:05:03 PM
Canberra, Australia
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fi.imgur.com%2FcM5JXFB.jpg&hash=c991b36e955a0b4450dce528f7d26094d939a29e)
Title: Re: Non-freeway beltways
Post by: froggie on March 03, 2014, 09:47:23 PM
QuoteI don't know what the history behind this loop is.

My first guess would depend on the age of it....wondering if it dates back to Roman times.
Title: Re: Non-freeway beltways
Post by: NE2 on March 03, 2014, 10:18:38 PM
Quote from: froggie on March 03, 2014, 09:47:23 PM
QuoteI don't know what the history behind this loop is.

My first guess would depend on the age of it....wondering if it dates back to Roman times.


According to Italian Wikipedia:
QuoteLa "strada poligonale" costituisce l'anulare della città: un cerchio perfetto di tre chilometri circa di raggio. Venne ideata e realizzata tra il 1946 e il 1948 dal presidente del consorzio delle strade vicinali Giuseppe Cazzolla con lo scopo di facilitare l'arrivo in città dalla campagna ma, nel tempo, è diventata un anello di congiunzione dei vari assi stradali che raggiungono la città.
Which means, per the Goog:
QuoteThe "road polygon" is the ring of the city: a perfect circle with a radius of two miles. It was designed and built between 1946 and 1948 by the President of the consortium of local roads Joseph Cazzolla with the aim of facilitating the arrival in town of the country, but, over time, has become a link of the different roads to reach the city .