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The Clyde Tunnel is a crossing beneath the River Clyde in Glasgow, Scotland. Two parallel tunnel tubes connect the districts of Whiteinch to the north and Govan to the south in the west of the city.
Efforts to improve the transport infrastructure of Glasgow post-World War II were hit by the problem of crossing the Clyde. Downstream of Jamaica Street in the city centre, it was perceived to be impossible to build a bridge due to the prevalence of shipping in what had been the second city of the British Empire still reliant on the sea. The solution — to build a tunnel beneath the river — was not a new one, with the Harbour Tunnel at Finnieston having been built in the 1890s. However, the Clyde Tunnel project was to be built in the boom of the car era and would be a much larger project. It was given the green light in 1948 but financial difficulties prevented work from beginning until 1957.