The firth of forth?....................
“The path is clear....”
https://www.youtube.com/watch?v=Rz-tHZEr37I
Forth has a firth, but this road uses a ford.
There's five bridges stretching across the Firth of Fourth at various locations. Two of them which I saw during a bus tour of the British Isles in 2006 were the rail bridge, which was built in Victorian times, and the road bridge. I watched a program a while back about UK bridges, and it takes the guys who paint the rail bridge a whole year to complete the job. Then once it's completed, they have to start all over again, from the beginning because it's so long and massive.