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Tridge or Y-Bridge

 
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Dr. N. Subramanian
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PostPosted: Fri Oct 11, 2013 3:11 am    Post subject: Tridge or Y-Bridge Reply with quote

Tridge or Y-Bridge
A bridge normally has two sides, that much is taken for granted. Yet what do you call a bridge which crosses a river three-ways? The citizens of Midland in Michigan, US, were faced with this conundrum but solved it with aplomb. They took the words bridge and tri and combined them. The tridge was born. In some other countries similar bridges are called as Y-Bridges.
Three way bridges are usually called tri-bridges and are not to be confused with Y-bridges, which are just fork bridges wherein the traffic from one direction bifurcates in two directions.
There are fourteen Y-Bridges in the world, out of which 8 are regular highway bridges.

Road Bridges
Aioi Bridge, Hiroshima, Japan
Bridge with Three Entrances (Ponte das Três Entradas), Portugal
Chu Y Bridge, Ho Chi Minh City, Vietnam
Hama Bridge (Sancha Zijin), Heicheng Village, Hebei, China
Jasenovac Tri-Bridge, Croatia
Louisa/Fort Gay Tri-Bridge (Kentucky/West Virginia), USA
Margaret Bridge (Margit Hid), Budapest, Hungary
Y-Bridge, Zanesville, Ohio, USA

Foot Bridges

Kikko Bridge, Mie, Japan
The Tridge, Midland, Michigan, USA
The Tridge, Frog Island Park, Ypsilanti, Michigan, USA
Treponti, Comacchio, Italy


  • The Tridge (Midland, Michigan)


When you see the marvelous eight foot wide wooden walkway you realize why skateboarders might be compelled to use the bridge as their latest play area!


•    Aioi Bridge, Hiroshima, Japan
The Aioi Bridge is an unusual "T"-shaped bridge in Hiroshima, Japan. The original bridge, constructed in 1932, was the aiming point for the 1945 Hiroshima atom bomb because its shape was easily recognized from the air. Although the bridge was not destroyed by the atomic blast, it did sustain heavy damage. After the war, the bridge was repaired and remained in service for nearly four decades, before it was replaced by a new bridge (built as a replica) in 1983. A surviving portion of a floor girder from the original bridge was subsequently donated to the Hiroshima Peace Memorial Museum.

The longest part of the bridge crosses the Ota River just to the north of the island containing the district of Nakajima-cho. The downstroke of the "T" links the main bridge to the island, and is also the north entrance to the Hiroshima Peace Memorial Park
•    All-America Bridge (Akron, Ohio), nicknamed the Y-Bridge
The All-America Bridge in Akron, Ohio is a viaduct carrying Ohio State Route 261 over the Little Cuyahoga River that splits into a one-way pair. Constructed 1981–1982, the bridge was named in recognition of Akron's past All-America City Awards and is also locally known as the Y-Bridge. The bridge is 134 feet tall in its highest location.

The bridge's predecessor, the 1922 North Hill Viaduct, was closed in 1977 after a collapse killed three.
•    Bridge with Three Entrances (Ponte das Três Entradas), Portugal
Ponte das Três Entradas (Bridge with Three Entrances) is a Y-bridge on the confluence of rivers Alvoco and Alvo in Porugal. Located near Oliveira do Hospital, Santa Ovaia, Coimbra, it was built in 1899 and its construction opened up the whole area connecting the towns of São Sebastião da Feira, Santa Ovaia and Aldeia das Dez.

Because of its unique shape and location, the settlements in the vicinity are also known as 'Ponte das Três Entradas'. The area has also now become a camping site and draws tourists for outdoor activities like fishing and canoeing etc.
•    Chu Y Bridge, Ho Chi Minh City, Vietnam
Chu Y Bridge spans Tau Hu and Doi canals to link Nguyen Bieu Street in District 5 and Hung Phu and Nguyen Thi Tan streets in District 8.
Original bridge at this location was built in 1937. However to cater for the rising needs of the traffic it was renovated and enlarged as a part of the East-West Highway Project.
The new bridge was inaugurated on April 28, 2009 and has navigation clearance of 6.3 m and width of 12 m. It may be noted that recently completed, nearby "Nguyen Van Cu" bridge (Panoramio Link) built as a part of the East-West Highway project looks like a bifurcated bridge and not a true Y-Bridge

•    Hama Bridge (Sancha Zijin), Heicheng Village, Hebei, China
http://www.flickr.com/photos/bridgink/3127605792/lightbox/
Located in Heicheng Village, Hebei Province, China, this bridge is locally known as Hama Bridge or Sancha Zijin and is a very old bridge, built circa 1691.
•    Kikko Bridge, Mie, Japan
Kikko Bridge, Mie, Japan, is a three way foot bridge in Aoyama-Kohgen Golf Club. It was built in 1991 and gives easy access from club house to the to golf courses around a small pond.

•    Margaret Bridge (Margit Hid), Budapest, Hungary
Margaret Bridge (Margit híd) connects Buda and Pest across the river Danube. It was built between 1872-76 and is the second oldest bridge in Budapest and one of the most widely used bridge. The main bridge has an angle of 165 degrees, is 637.5 metres long and 25 metres wide. Near about the mid point there is a small third arm leading to the 'Margaret Island'. This extension was added in design at the last stages of designing hence the slight angle. However the extension was built almost 20 years after the completion of the main bridge.

The bridge got damaged in 1944 and was repaired after the war. Due to extensive use it needed repairs badly so it has been closed in September 2009 for a year. I understand the pedestrians/cyclists will continue to use it while cars and heavy vehicles will have to use the other bridges till it is back in service.




•    The Tridge, Frog Island Park, Ypsilanti, Michigan,
•    Trepponti, Comacchio, Italy, a five-way bridge
•    Trinity Bridge (Crowland), Lincolnshire, England
•    Y-Bridge (Galena, Missouri)
•    Y-Bridge (Zanesville, Ohio)
•    Y Railroad Bridge along the Allegheny River in Venango County, Pennsylvania
Sources:
1.    http://www.kuriositas.com/2012/01/tridge-michigans-three-way-bridge.html
2.    http://en.wikipedia.org/wiki/Y-Bridge_%28disambiguation%29
3.    http://emorfes.com/2010/10/21/beautiful-tri-bridges-around-the-world/
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PostPosted: Mon Oct 14, 2013 12:15 am    Post subject: Re: Tridge or Y-Bridge Reply with quote

Tridge or Y-Bridge
A bridge normally has two sides, that much is taken for granted. Yet what do you call a bridge which crosses a river three-ways? The citizens of Midland in Michigan, US, were faced with this conundrum but solved it with aplomb. They took the words bridge and tri and combined them. The tridge was born. In some other countries similar bridges are called as Y-Bridges.
Three way bridges are usually called tri-bridges and are not to be confused with Y-bridges, which are just fork bridges wherein the traffic from one direction bifurcates in two directions.
There are fourteen Y-Bridges in the world, out of which 8 are regular highway bridges.

Road Bridges
Aioi Bridge, Hiroshima, Japan
Bridge with Three Entrances (Ponte das Três Entradas), Portugal
Chu Y Bridge, Ho Chi Minh City, Vietnam
Hama Bridge (Sancha Zijin), Heicheng Village, Hebei, China
Jasenovac Tri-Bridge, Croatia
Louisa/Fort Gay Tri-Bridge (Kentucky/West Virginia), USA
Margaret Bridge (Margit Hid), Budapest, Hungary
Y-Bridge, Zanesville, Ohio, USA

Foot Bridges

Kikko Bridge, Mie, Japan
The Tridge, Midland, Michigan, USA
The Tridge, Frog Island Park, Ypsilanti, Michigan, USA
Treponti, Comacchio, Italy


  • The Tridge (Midland, Michigan)


When you see the marvelous eight foot wide wooden walkway you realize why skateboarders might be compelled to use the bridge as their latest play area!


•    Aioi Bridge, Hiroshima, Japan
The Aioi Bridge is an unusual "T"-shaped bridge in Hiroshima, Japan. The original bridge, constructed in 1932, was the aiming point for the 1945 Hiroshima atom bomb because its shape was easily recognized from the air. Although the bridge was not destroyed by the atomic blast, it did sustain heavy damage. After the war, the bridge was repaired and remained in service for nearly four decades, before it was replaced by a new bridge (built as a replica) in 1983. A surviving portion of a floor girder from the original bridge was subsequently donated to the Hiroshima Peace Memorial Museum.

The longest part of the bridge crosses the Ota River just to the north of the island containing the district of Nakajima-cho. The downstroke of the "T" links the main bridge to the island, and is also the north entrance to the Hiroshima Peace Memorial Park
•    All-America Bridge (Akron, Ohio), nicknamed the Y-Bridge
The All-America Bridge in Akron, Ohio is a viaduct carrying Ohio State Route 261 over the Little Cuyahoga River that splits into a one-way pair. Constructed 1981–1982, the bridge was named in recognition of Akron's past All-America City Awards and is also locally known as the Y-Bridge. The bridge is 134 feet tall in its highest location.

The bridge's predecessor, the 1922 North Hill Viaduct, was closed in 1977 after a collapse killed three.
•    Bridge with Three Entrances (Ponte das Três Entradas), Portugal
Ponte das Três Entradas (Bridge with Three Entrances) is a Y-bridge on the confluence of rivers Alvoco and Alvo in Porugal. Located near Oliveira do Hospital, Santa Ovaia, Coimbra, it was built in 1899 and its construction opened up the whole area connecting the towns of São Sebastião da Feira, Santa Ovaia and Aldeia das Dez.

Because of its unique shape and location, the settlements in the vicinity are also known as 'Ponte das Três Entradas'. The area has also now become a camping site and draws tourists for outdoor activities like fishing and canoeing etc.
•    Chu Y Bridge, Ho Chi Minh City, Vietnam
Chu Y Bridge spans Tau Hu and Doi canals to link Nguyen Bieu Street in District 5 and Hung Phu and Nguyen Thi Tan streets in District 8.
Original bridge at this location was built in 1937. However to cater for the rising needs of the traffic it was renovated and enlarged as a part of the East-West Highway Project.
The new bridge was inaugurated on April 28, 2009 and has navigation clearance of 6.3 m and width of 12 m. It may be noted that recently completed, nearby "Nguyen Van Cu" bridge (Panoramio Link) built as a part of the East-West Highway project looks like a bifurcated bridge and not a true Y-Bridge

•    Hama Bridge (Sancha Zijin), Heicheng Village, Hebei, China
http://www.flickr.com/photos/bridgink/3127605792/lightbox/
Located in Heicheng Village, Hebei Province, China, this bridge is locally known as Hama Bridge or Sancha Zijin and is a very old bridge, built circa 1691.
•    Kikko Bridge, Mie, Japan
Kikko Bridge, Mie, Japan, is a three way foot bridge in Aoyama-Kohgen Golf Club. It was built in 1991 and gives easy access from club house to the to golf courses around a small pond.

•    Margaret Bridge (Margit Hid), Budapest, Hungary
Margaret Bridge (Margit híd) connects Buda and Pest across the river Danube. It was built between 1872-76 and is the second oldest bridge in Budapest and one of the most widely used bridge. The main bridge has an angle of 165 degrees, is 637.5 metres long and 25 metres wide. Near about the mid point there is a small third arm leading to the 'Margaret Island'. This extension was added in design at the last stages of designing hence the slight angle. However the extension was built almost 20 years after the completion of the main bridge.

The bridge got damaged in 1944 and was repaired after the war. Due to extensive use it needed repairs badly so it has been closed in September 2009 for a year. I understand the pedestrians/cyclists will continue to use it while cars and heavy vehicles will have to use the other bridges till it is back in service.




•    The Tridge, Frog Island Park, Ypsilanti, Michigan,
•    Trepponti, Comacchio, Italy, a five-way bridge
•    Trinity Bridge (Crowland), Lincolnshire, England
•    Y-Bridge (Galena, Missouri)
•    Y-Bridge (Zanesville, Ohio)
•    Y Railroad Bridge along the Allegheny River in Venango County, Pennsylvania
Sources:
1.    http://www.kuriositas.com/2012/01/tridge-michigans-three-way-bridge.html
2.    http://en.wikipedia.org/wiki/Y-Bridge_%28disambiguation%29
3.    http://emorfes.com/2010/10/21/beautiful-tri-bridges-around-the-world/
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