Yes.
But you need a tunnel which runs under the sea.
The most famous is the Channel Tunnel between England and France. Other examples are between the the Danish islands, and between the Japanese islands.
The London Underground (the tube) runs under the Thames, and the Thames is tidal, so you could count this as running under the sea.
The Channel Tunnel is both underground and underwater. The train system runs under the English Channel and connects Great Britain to France.
The diesels run out of fuel. Electric trains run out of electricity.
There is no subway line under Madison Avenue, although there are bus-only traffic lanes. Two blocks east, the 4-5-6 trains run under Lexington Avenue (and Park Avenue below Grand Central).
British trains run on both diesel and electric
They run on coal :)
Trains run on tracks. The tracks are made up of a pair of parallel rails.
Yes. Buses run from Dublin to Armagh and trains run from Dublin to county Armagh.
New trains are not built to be coal powered. However there are still some steam trains run and maintained by amateur enthusiasts.
You run the risk of a tsunami
The Chanel Tunnel is an underground rail system that connects both France and the United Kingdom. It runs under the sea.
Subway trains typically run on electricity that powers electric motors in the train cars. The electricity can come from a variety of sources, including overhead wires, third rails, or onboard batteries.
Trains run 365 days of the year