The article I would like to read is what the challenges are to including a few prior states in navigation. I'm amazed that, when I drive over or under a bridge

The article I would like to read is what the challenges are to including a few prior states in navigation. I'm amazed that, when I drive over or under a bridge, my online mapping software changes instructions as if my car were able to levitate 20 feet onto the roadway above or below, even when that roadway is a highway without exit or entrance within a mile.