Also, live traffic data to use the available road-space more efficiently. My GPS does that already, and will divert me around traffic jams when there are available side roads, but will stay on the main route when the side-roads as just as bad.
Also, live traffic data to use the available road-space more efficiently. My GPS does that already, and will divert me around traffic jams when there are available side roads, but will stay on the main route when the side-roads as just as bad.