Road -- DupliFrames

10.  Apply Scale and Rotation to the road shape and track path
  •  Road shape selected.  Object mode.

    3D View menu >> Object >> Apply >> Rotation & Scale
     
  • Path selected.  Object mode

    3D View menu >> Object >> Apply >> Rotation & Scale
Note:
  • While you don't have to, you'll get the best results if the road shape and track path have the same scale and orientation.
11. Parent road shape to track path.  Use Follow Path.
  • Parent road shape to track path

    Select Road Shape 1st.

    Hold Shift Key Down.

    Select Path 2nd.(Both Road Shape and Path selected)

  • Use Follow Path

    3D View menu >> Object >> Parent >> Set >> Follow Path

12. Clear road shape Origin
  • Select Road shape.   Object Mode

  • 3D View menu >> Object >> Clear >> Origin

Note:
  • Clearing the road shape origin will move the road shape to start of the track path