James Watt discovered the steam engine. The underground railways is only an application of it. James Watt invented the engine and other people like ourselves found another use for it. Hence, there is no specific inventor.
Rails, usually made out of steel.
Rail-roads
rail roads
Canada
Alaska
cotton from the south
Rail roads
Westinghouse
for military propose or to get mountains out of the way to make roads or rail roads
In Rome or Bari probably.
increase of roads and rail from 1990 to 2007 in Pakistan
Ogden, Utah