Thanks for the immediate reply and the links!

There may be a fundamental difference between the typical desire to extend the OSM data base (e.g. to hot dog suppliers) and the idea to use the existing map objects to obtain novel and not so obvious information. To visualize ancient route systems, the original street map objects just need a sort of an additional attribute that marks them as ‘typical’ with respect to name, direction, sun-/moon- related collinearity and cultural relevance (a similar task would be to mark map objects as ‘wheel-chair accessible’).

Regards