Thursday, April 16, 2009


The longest and the deepest railway tunnel in the world

The Seikan Tunnel is a 1,74,240 feet (53.5 km) long railway tunnel in Japan, with a 76.443 feet (23.3 km) portion under the sea.

It is the longest and deepest tunnel in the world.

It connects Aomori Prefecture on the Japanese island and the island of Hokkaido.

The tunnel was opened in March 1988.

There are two train stations inside the tunnel.

More than 2800 tons of explosives and more than 1, 68,000 tons of steel was used in the construction of the tunnel.

That’s enough steel to build Four petronas Towers.

Though this tunnel is world’s longest tunnel but its submarine portion (i.e.23.3 km) is not the longest submarine portion in the world, because the submarine part of Euro tunnel is 37.5 km, with the total length of 50.45 km.

Wednesday, April 15, 2009


World’s longest sea –crossing bridge

Hangzhou Bay Bridge is world’s longest sea-crossing bridge across Hangzhou Bay of China.

It connects Shanghai and Ningbo’s Cixi city.

The bridge is 35.67 km long with six expressway lanes.

Previously the trip from Ningbo to Shanghai was around 400 km.

The bridge reduced the distance to 80 km, a reduction of 320 km.

It is an S-shaped cable-stayed bridge with world’s longest span of 1088 meter.

The construction started on June 8, 2003 and it was opened to the public on May 2, 2008.

The total investment on the bridge was US$ 1.7 billion.

Around 600 experts spent nine years on designing the Hangzhou Bay Bridge.

Recently they have planned the 10000 sq. meter island service area located mid-bridge which will provide food, lodging and an observation tower.

It is scheduled to open by the end of 2009.