The Collaborative International Dictionary of English v.0.48:

Truckage \Truck"age\, n.
   The practice of bartering goods; exchange; barter; truck.
   [1913 Webster]

         The truckage of perishing coin.          --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Truckage \Truck"age\, n.
   Money paid for the conveyance of goods on a truck; freight.
   [1913 Webster]

WordNet (r) 3.0 (2006):

truckage
    n 1: a fee charged for transporting goods by truckage
    2: the activity of transporting goods by truck [syn: hauling,
       trucking, truckage]

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "truckage":
   air express, airfreight, airlift, asportation, bearing, carriage,
   carry, carrying, cartage, conveyance, drayage, expressage,
   ferriage, freight, freightage, haulage, hauling, lighterage,
   lugging, packing, portage, porterage, railway express, shipment,
   shipping, telpherage, toting, transport, transportation,
   transshipment, waft, waftage, wagonage