Road–rail tunnels are tunnels shared by road and rail lines, as an economy measure compared to constructing segregated tunnels. Road and rail may be provided with separate tubes.
Road–rail tunnels are tunnels shared by road and rail lines, as an economy measure compared to constructing segregated tunnels. Road and rail may be provided with separate tubes. (en)
Road–rail tunnels are tunnels shared by road and rail lines, as an economy measure compared to constructing segregated tunnels. Road and rail may be provided with separate tubes. (en)