A very interesting website (tip o’ the pileus to Jona Lendering), briefly described as:
A route planner with all main roads and cities of the Roman Empire. Based on an ancient Roman map of which a copy survived that is now known as the ‘Tabula Peutingeriana’. This site mostly extends on research by Richard Talbert.
… sort of an ancient GPS
rogueclassicism 
I am happy to announce that I just released a vastly improved version. Have a look at http://www.omnesviae.org.
Main improvement is Google Maps integration. About half of all stations / cities from the Peutinger map are now plotted on Google Maps, including their original icons (icon class). Not all stops have been mapped properly yet, but still I think it is impressive to see how the full Peutingeriana would look in our current Google Maps world.