This will require you to drive along all 216 roads. Each time you drive along a road you will not only receive a popup confirmation but the road on your map will either turn white (hard surface) or orange (dirt surface.) At any time you can check the number of roads you have driven by checking the ‘Discovery’ tab in the ‘My Profile’ menu.
You will drive along the majority of roads as you progress through the game but chances are there will be a few that can be missed. In this event, remember to look closely at the map and be sure to turn off all other icons. Many of the roads in and around towns can be short and difficult to miss so try searching around these locations. Be sure to drive along on and off ramps to the freeways and the roads that pass underneath.
TIP: Any roads driven along in both rival events and online modes count towards this achievement.