While waiting for the ultimate atlas/map application in Logos, this might be interesting:
Roman route planner http://omnesviae.org/
I made a quick test, and seems to work. Needs often the Latin place names to work, but they can be found on the map and in the search interface.
It might be used for example to speculate the trips of Paul accurately:
http://omnesviae.org/#!iter_TPPlace2040_TPPlace1890