Beltway
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A beltway (American English), ring road or orbital motorway (British English) is a circumferential highway found around many cities. Often it originally enclosed the built up area and was later encroached upon by developed areas - and some cities have proposed or built second and even third beltways. In the United States, many beltways are part of the Interstate highway system. The concept of a ring road also includes a road in the downtown area, distributing traffic and keeping it from the very center.
The main purpose of beltways is deflecting some traffic from the center of the city.
In the US, the slang word Beltway refers to politics conducted inside the Beltway in Washington, DC.
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List of world beltways
Africa
South Africa
South Africa has the most advanced road system of any African country, a legacy of the Apartheid government. Most of the major cities' ring roads were built in the 1970s. Well constructed, they are on par with the best in the Western world.
Americas (North and South)
Canada
United States
- Interstate 264 (Henry Watterson Expressway), Louisville, Kentucky
- Interstate 265 (Gene Snyder Freeway), Louisville, Kentucky
- Interstate 270, Columbus, Ohio
- Interstate 275, Cincinnati, Ohio
- Interstate 285 (The Perimeter), Atlanta, Georgia
- Interstate 435, Kansas City, Kansas/Kansas City, Missouri
- Interstate 440, Raleigh, North Carolina
- Interstate 465, Indianapolis, Indiana
- Interstate 495 (Capital Beltway), Washington, DC
- Interstate 494/Interstate 694, Minneapolis-St. Paul
- Interstate 540, Wake County, North Carolina (unfinished)
- Interstate 610 (The 610 Loop), Houston, Texas
- Interstate 695 (Baltimore Beltway), Baltimore, Maryland
- Massachusetts State Highway 128, Boston, Massachusetts
- Beltway 8 (Sam Houston Tollway), Houston, Texas
- Tennessee State Route 840, Nashville, Tennessee (unfinished)
- Interstate 405 (CA) (The Ventura Freeway), Los Angeles, California
- Interstate 495, Outer suburbs of Boston, Massachusetts
Asia
China
- 2nd, 3rd, 4th, 5th and 6th Ring Roads, Beijing
- 1st, 2nd and 3rd Ring Roads, Chengdu
- Shenyang Round City Expressway, Shenyang
- Tangshan Round City Expressway, Tangshan
- Inner, Middle and Outer Ring Roads, Tianjin
India
Inner and Outer Ring Roads, Bangalore
Delhi Ring Road and Delhi Outer Ring Road, New Delhi
Australia
New South Wales
Queensland
- Brisbane Orbital, comprising:
- Gateway Motorway (eastern orbital)
- Logan Motorway (southern orbital)
- Western Bypass Motorway (proposed western orbital)
- Inner City Bypass (inner north ring road)
Victoria
Western Australia
- Perth Inner Orbital:
- Reid Highway (northern)
- Tonkin Highway (eastern)
- Leach Highway (southern)
- Perth Outer Orbital:
- Roe Highway (eastern)
- Roe Freeway (southern)
- Bunbury Ring Road (proposed outer bypass), Bunbury
Europe
Austria
- Gürtel (Outer Ring), Vienna
- Ringstrasse (Inner Ring), Vienna
Belgium
Finland
- Kehä I (Ring 1), encircling Helsinki trough Espoo and Vantaa
- Kehä II (Ring 2), traffic loadout highway trough Espoo
- Kehä III (Ring 3), encircling Helsinki trough Vantaa, Espoo and Kirkkonummi
Greece
- Attiki Odos, Athens
- Greece Interstate 4 (Thessalonike Beltway), Thessaloníke
- Greece Interstate 8A (Patras Beltway), Patras (Roitika to near University of Patras)
Italy
Netherlands
United Kingdom
source: http://kartta.hel.fi/opas/en/
Miscellaneous
- Périphérique, Paris, France
- Kölner Ring - Cologne, Germany
- M30 motorway, Madrid, Spain
- M50 motorway, Dublin, Ireland