With a large enough data set I'm guessing it'd be pretty trivial. It seems like it'd depend on how many places data was collected from. Car #308933938 drove past main street each morning mon-fri between the hours of 7:30am and 7:50am heading north doesn't tell you much, but if you catch the same car at more intersections every morning and don't record it at several other intersections along his projected route you could get a pretty clear picture of where they are going and where they stopped.