A three-way bridge (or tri-bridge) is a bridge with three distinct and separate spans, where one end of each span meets at a common point near the centre of the bridge. Unlike other bridges which have two entry-exit points, three-way bridges have three entry-exit points. For this reason, three-way bridges are not to be confused with commonly found road bridges which carry vehicles in one direction from one entry point, and then bifurcate into two other one-way bridges.
Three-way bridges are located throughout the world, though they are rare. Some are as small as a footbridge, while others are multi-lane roadways.
Three-way bridges are often referred to as "T-bridges" or "Y-bridges", due to their shape when viewed from above. Three cities in Michigan each have a three-way bridge named "The Tridge", combining "tri" and "bridge".
The unique shape of a three-way bridge makes it easy to identify from an airplane. Pilot Amelia Earhart described Zanesville, Ohio as "the most recognizable city in the country" because of its Y-shaped bridge, and the pilots of Enola Gay aimed for Hiroshima's T-shaped Aioi Bridge when they dropped the atom bomb.
Locations and features
|Aioi Bridge||Hiroshima, Japan||34°23′47″N 132°27′09″E / 34.3964°N 132.4526°E||Vehicle and pedestrian T-bridge.|
|Bergues Bridge (fr:Pont des Bergues)||Geneva, Switzerland||46°12′21″N 6°08′49″E / 46.20593°N 6.147054°E||Pedestrian Y-bridge over the Rhône.|
|BlueCross BlueShield of Tennessee building footbridge||Chattanooga, Tennessee, United States||35°03′08″N 85°19′05″W / 35.05223°N 85.31798°W||T-shaped footbridge.|
|Bridge With 3 Branches (Le pont à 3 branches)||Pont-de-Veyle, France||46°15′59″N 4°52′45″E / 46.266467°N 4.879134°E||Pedestrian Y-bridge over the Veyle.|
|Bridge With Three Entrances (Ponte das Três Entradas)||Oliveira do Hospital Municipality, Portugal||40°18′24″N 7°52′16″W / 40.306739°N 7.871198°W||Vehicle and pedestrian Y-bridge.|
|Butterfly Bridge||Copenhagen, Denmark||55°40′40″N 12°35′56″E / 55.677694°N 12.598943°E||Pedestrian Y-bridge. Two of the bridge spans may open for passing sailboats. When both spans open at the same time the bridge resembles a butterfly.|
|Calatrava Bridge||Petah Tikva, Israel||32°05′30″N 34°51′59″E / 32.091803°N 34.86641°E||Y-shaped footbridge designed by Santiago Calatrava.|
|Camp Evergreen Girl Scouts Camp bridge||Cowlitz County, Washington, United States||46°12′40″N 123°12′24″W / 46.211098°N 123.206755°W||Pedestrian Y-bridge over Mill Creek.|
|Chu Y Bridge||Ho Chi Minh City, Vietnam||10°45′03″N 106°41′01″E / 10.750946°N 106.683653°E||Vehicle and pedestrian Y-bridge built in 1937.|
|Colin Glen Forest Park Tri-Bridge||Dunmurry, Northern Ireland||54°34′38″N 6°02′04″W / 54.577218°N 6.034307°W||Y-shaped footbridge.|
|Eco-Viikki Three Way Bridge||Helsinki, Finland||60°13′34″N 25°02′03″E / 60.226107°N 25.034079°E||Pedestrian Y-bridge.|
|Fogelsangh State Three Way Bridge||Veenklooster, Netherlands||53°15′48″N 6°06′35″E / 53.263396°N 6.109713°E||Pedestrian Y-bridge.|
|Galena Y-Bridge||Galena, Missouri, United States||36°48′19″N 93°27′40″W / 36.805393°N 93.460998°W||Y-shaped bridge historically used for vehicle traffic, now a footbridge.|
|Jasenovac Tri-Bridge||Between Jasenovac, Sisak-Moslavina County, Slavonia and Uštica, Bosnia and Herzegovina||45°16′05″N 16°55′01″E / 45.267997°N 16.916949°E||Vehicle and pedestrian Y-bridge originally built in 1973, destroyed in 1991, then re-built in 2005.|
|Kang Ding Tri-Bridge||Kang Ding Xian, Garzê Tibetan Autonomous Prefecture, China||30°03′21″N 101°57′55″E / 30.05592°N 101.965254°E||Pedestrian Y-bridge.|
|Kikko Bridge||Aoyamakogen Country Club, Mie Prefecture, Japan||34°42′01″N 136°24′04″E / 34.700234°N 136.401003°E||Y-shaped footbridge built in 1991.|
|Lune Millennium Bridge||Lancaster, Lancashire, England||54°03′08″N 2°48′09″W / 54.052191°N 2.802525°W||Y-shaped footbridge.|
|Louisa/Fort Gay Tri-Bridge||Between Fort Gay, West Virginia and Louisa, Kentucky, United States||38°06′59″N 82°35′59″W / 38.11632°N 82.599821°W||Vehicle and pedestrian T-bridge opened in 1906.|
|Madrid Rio Y Bridge||Madrid, Spain||40°24′18″N 3°43′22″W / 40.405114°N 3.722811°W||Y-shaped footbridge over Manzanares River.|
|Malvina Footbridge||Malvina, Mississippi, United States||33°51′08″N 90°55′09″W / 33.852288°N 90.919145°W||Wooden vehicle and pedestrian T-bridge built in the late 1920s, and demolished in 1972.|
|Mangakahia Twin Bridges||Nukutawhiti, New Zealand||35°37′26″S 173°50′48″E / 35.623797°S 173.846626°E||Vehicle and pedestrian T-bridge over Mangakahia River.|
|Margaret Bridge||Budapest, Hungary||47°30′53″N 19°02′37″E / 47.514722°N 19.043611°E||Vehicle and pedestrian Y-bridge.|
|nl:Noabers Badde, also called Mercedesbrug||Veelerveen, Netherlands||53°03′12″N 7°07′39″E / 53.053361°N 7.127363°E||Pedestrian Y-bridge built in 1989 at the convergence of the Mussel, Diamonds, and During canals.|
|Overseas Highway||Pigeon Key, Florida,United States||24°42′15″N 81°09′22″W / 24.704289°N 81.155974°W||Partially abandoned vehicle and pedestrian T-bridge.|
|Pierre Corneille Bridge (fr:Pont Pierre-Corneille)||Rouen, France||49°26′09″N 1°05′44″E / 49.435948°N 1.095497°E||Vehicle and pedestrian T-bridge over the Seine.|
|Raehills Three-Way Footbridge||Lockerbie, Scotland||55°13′38″N 3°27′55″W / 55.227105°N 3.465388°W||Y-shaped footbridge built in the late 1800s.|
|Sancha Zijin Bridge/Hama Bridge||Xingtai, Hebei, China||37°31′19″N 114°29′08″E / 37.522016°N 114.485609°E||Vehicle and pedestrian stone Y-bridge built in 1691.|
|Staniastate footbridge||Staniastate, Oentsjerk, Netherlands||53°15′25″N 5°53′50″E / 53.257006°N 5.897111°E||Y-shaped footbridge.|
|Strömsborgsbron||Gamla stan, Sweden||59°19′38″N 18°03′51″E / 59.327304°N 18.064282°E||Vehicle and pedestrian T-bridge.|
|Thetford Footbridge||Thetford, England||52°24′48″N 0°44′49″E / 52.413277°N 0.746904°E||Y-shaped footbridge.|
|Three-Way Bridge||Lyons Falls, New York, United States||43°37′01″N 75°21′26″W / 43.616879°N 75.357202°W||Vehicle and pedestrian wooden T-bridge opened in 1849, replaced with steel in 1916, and demolished in 1965.|
|Treponti||Comacchio, Italy||44°41′35″N 12°11′00″E / 44.692984°N 12.18329°E||Five-way stone footbridge at the intersection of five canals, built in 1634.|
|The Tridge (Brighton)||Brighton, Michigan, United States||42°31′50″N 83°46′59″W / 42.530473°N 83.783022°W||Y-shaped footbridge.|
|The Tridge (Midland)||Midland, Michigan, United States||43°36′40″N 84°14′55″W / 43.611052°N 84.248689°W||Y-shaped footbridge.|
|The Tridge (Ypsilanti)||Ypsilanti, Michigan, United States||42°14′44″N 83°36′42″W / 42.24561°N 83.6116°W||Y-shaped footbridge.|
|Trinity Bridge (Crowland)||Crowland, Lincolnshire, England||52°40′33″N 0°10′06″W / 52.6757°N 0.168281°W||Y-shaped stone footbridge.|
|Trinity Bridge (Greater Manchester)||Greater Manchester, England||53°28′58″N 2°15′04″W / 53.482717°N 2.251098°W||Y-shaped footbridge over River Irwell, designed by Santiago Calatrava.|
|Vijversburg Estate Tri-Bridge||Tytsjerk, Netherlands||53°13′01″N 5°54′28″E / 53.217052°N 5.907743°E||Y-shaped footbridge.|
|Vines Mansion Bridge||Loganville, Georgia, United States||33°51′43″N 83°55′25″W / 33.862035°N 83.923614°W||Y-shaped footbridge.|
|Ypsilon Bridge||Drammen, Norway||59°44′40″N 10°11′43″E / 59.744396°N 10.195313°E||Y-shaped footbridge.|
|Zanesville Y-Bridge||Zanesville, Ohio, United States||39°56′26″N 82°00′52″W / 39.940417°N 82.014306°W||Vehicle and pedestrian Y-bridge.|
|Wikimedia Commons has media related to Tri-bridges.|
- "The Tridge – Michigan's Three Way Bridge". Kuriositas. January 2, 2012.
- "Y Bridge". Zanesville-Muskingum County Visitors Bureau. Retrieved September 10, 2016.
- "Aioi Bridge". Hiroshima & Nagasaki Remembered. Retrieved September 10, 2016.
- "Butterfly Bridge / Dietmar Feichtinger Architectes". ArchDaily. April 19, 2015.
- "Beautiful Tri-Bridges Around the World". Emorfes. October 21, 2010.
- "Tri-Bridges Around the World". November 3, 2012.
- "Phalia / Malvina" (PDF). Msgw.org. Retrieved September 10, 2016.
- "Noabers Badde". Structure. Retrieved September 10, 2016.
- "Raehills, Wallace's Loup, Footbridge". Royal Commission on the Ancient and Historical Monuments of Scotland. Retrieved September 10, 2016.
- "Sancha Zijin Bridge aka Hama Bridge". Robert Cortright. Retrieved September 10, 2016.
- "Three-Way Bridge". Village of Lyons Falls. Retrieved September 10, 2016.
- "Brighton Downtown Development Authority - Standard Streetscape Details" (PDF). City of Brighton. July 2006.