The Collaborative International Dictionary of English v.0.48:

Motorman \Mo"tor*man\, n.
   1. A man who controls a motor. [archaic]
      [1913 Webster]

   2. an operator of a motor vehicle, especially of a streetcar
      or subway train.
      [PJC]

WordNet (r) 3.0 (2006):

motorman
    n 1: the operator of streetcar