Blackwall Tunnel. London

টোল ছাড়াই টানেল পারাপার। Blackwall Tunnel.
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The Blackwall Tunnel is a pair of road tunnels underneath the River Thames in east London, England, linking the London Borough of Tower Hamlets with the Royal Borough of Greenwich, and part of the A102 road....
Constructed: 1892-1897 (western bore); 1960-1967 (eastern bore)
Operating speed: up to 30 mph (48 km/h)
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