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Marmaray: World’s first tunnel connecting two continents inaugurated on Turkey’s 90th Republic Day

Marmaray tunnel underneath the Bosphorus Strait has been opened in Turkey, creating a new link between the Asian and European shores of Istanbul.

The Marmaray tunnel is the world’s first connecting two continents, and is designed to withstand earthquakes.

The railway tunnel was inaugurated on the 90th anniversary of the Republic of Turkey.

Turkish PM Recep Tayyip Erdogan has for years championed the undersea engineering project, first conceived by an Ottoman sultan in 1860.

Work began in 2004, but archaeological excavations delayed construction.

The underwater section runs for 0.8 miles (1.4 km), but in total the tunnel is 8.5 miles (13.6 km) long.

Japan invested $1 billion of the $4 billion total cost of the project, named Marmaray, which is a conflation of the nearby Sea of Marmara with “ray”, the Turkish word for rail.

The Turkish government hopes the new route under the Bosphorus will eventually develop into an important trading route.

Marmaray tunnel underneath the Bosphorus Strait has been opened in Turkey, creating a new link between the Asian and European shores of Istanbul

Marmaray tunnel underneath the Bosphorus Strait has been opened in Turkey, creating a new link between the Asian and European shores of Istanbul

In theory it brings closer the day when it will be possible to travel from London to Beijing via Istanbul by train.

The Marmaray project will upgrade existing suburban train lines to create a direct link joining the southern part of the city across the Bosphorus Strait.

Istanbul is one of the world’s biggest cities, with about 16 million people. Some 2 million people cross the Bosphorus every day via just two bridges, causing severe traffic congestion, the AFP news agency reported.

The rail service will be capable of carrying 75,000 people per hour in either direction.

“While creating a transport axis between the east and west points of the city, I believe it will soothe the problem” of congestion, said Istanbul’s Mayor Kadir Topbas.

Critics of PM Recep Tayyip Erdogan have seen the tunnel as one of his grandiose construction projects for the city where he used to be mayor.

Detractors of his proposals, including a third airport, a parallel canal, a third bridge over the Bosphorus and a second tunnel – for cars, south of Marmaray – say they illustrate Recep Tayyip Erdogan’s “pharaonic” ambitions.

Authorities came under fire earlier this year when protesters opposed plans to redevelop Istanbul’s Gezi Park. Widespread violence between anti-government demonstrators and security forces ensued.

Marmaray tunnel is still not fully operational after Tuesday’s opening, AFP reports.

“The part that is in service is very limited. All that has been delayed until much later,” said Tayfun Kahraman, president of the Istanbul Chamber of Urban Planners.

“We are wondering why this inauguration is happening so soon.”

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