The Clyde Tunnel is a road tunnel located in Glasgow, Scotland. It runs beneath the River Clyde, connecting the areas of Govan and Partick. Opened in 1963, the tunnel was designed to ease traffic congestion and improve transportation across the river. The tunnel is approximately 1.2 kilometers long and features two lanes for vehicles. It is an important part of the local road network, allowing for smoother travel between the north and south sides of the city. The Clyde Tunnel is also notable for its unique construction, which involved innovative engineering techniques for its time.