WordReference Random House Unabridged Dictionary of American English © 2020
traf•fic•a•bil•i•ty  (traf′i kə bili tē),USA pronunciation n. 
  1. the condition of soil or terrain with regard to its being traveled over, as by people, vehicles, or machinery.
  2. the skill of maneuvering over a terrain.
  • trafficable + -ity 1895–1900

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