The Collaborative International Dictionary of English v.0.48:

Telpherage \Tel"pher*age\, n.
   1. The conveyance of vehicles or loads by means of
      electricity. --Fleeming Jenkin.
      [1913 Webster]

   2. (Elec.) Specif., electric transportation of goods by means
      of carriages suspended on overhead conductors, as of wire,
      the power being conveyed to the motor carriage by the
      wires on which it runs. Telpherage and telpher are
      sometimes applied to such systems in which the motive
      power is not electricity.
      [Webster 1913 Suppl.]

WordNet (r) 3.0 (2006):

telpherage
    n 1: a transportation system in which cars (telphers) are
         suspended from cables and operated on electricity [syn:
         telpherage, telferage]