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]