1820  (1890)  With the summer road they were acquainted and that, therefore, they followed.
1909  What will be the cry on the summer roads when we reach those points where the dense forest and rocks obstructs the view ahead . . . ?
1957  This was evidently a "summer road," i.e. one which could be used at all seasons of the year by either sleighs or wheeled vehicles; a "winter road" was meant to be used by sleighs only, and therefore the construction cost was much less than for a summer road.