A37 (Isle of Man)

The A37 is a short stub - it is perhaps unique in that it is unconnected to another A road and while roads like the A888 on Barra are like that, they are the only A road on the island, which isn't the case here.

It wasn't always like that - it used to follow the whole of Marine Drive, from Douglas to Port Soderick. However parts of the road have become unstable, so closed to motor vehicles, with the northern section renumbered as B80.