Raise your hand if you remember what it was like navigating on road trips in the pre-smartphone, pre-GPS era. Before you set out from your house, you had to find your destination on a roadmap, and chart a course that could, if the destination was far enough afield, involve multiple intersecting highways or interstates. If you were driving alone, checking your map could be hazardous during driving, meaning that you had to memorize most of the turns, even if they were on unfamiliar roads. If you needed to fill up on gas, finding out the location of the next gas station would be a matter of waiting for signs on the highway to appear and alert you to the exit number of the next rest stop. Once you left the highway, you had to navigate by street signs until you reached your destination. If, at any point, a road you intended to use was closed, you would be back to the drawing board.