The Collaborative International Dictionary of English v.0.48:

Railroading \Rail"road`ing\, n.
   The construction of a railroad; the business of managing or
   operating a railroad. [Colloq. U. S.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

railroading
    n 1: the activity of designing and constructing and operating
         railroads [syn: rail technology, railroading]