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The road to theory works both ways . A change from normal crossfall to superelevation occurs as the road changes from a straight to a curved alignment . Sections of road assumed to provide for overtaking will commence at a point where establishment sight distance is available , and finish where the available sight distance drops below the continuation sight distance . " And while Abraham and Isaac were proceeding along the road , Satan came and appeared to Abraham in the figure of a very aged man , humble and of contrite spirit , and said to him : " Art thou silly or foolish , that thou goest to do this thing to thine only son ? When Australia finally starts on the road to recovery a very large Budget deficit will ensure that we take one step forward and two steps back .