Source : Webster's Revised Unabridged Dictionary (1913)

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

         The truckage of perishing coin.          --Milton.

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

Source : WordNet®

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