The plan for new OpenRails created routes using the OpenRails WorldEditor is to "model" roads/etc just like trains are modelled - i.e. there is a route (track or pavement/dirt/field - it's almost irrelevant what the graphic is); there is AI (trains or cars/trucks/tractors) and there are indications and direction changes (signals/stop lights & switches/intersections).
This will require a "converted" or "new" OpenRails-based route as the data required to support this kind of functionality doesn't exist in MSTS and there is no way to add it to MSTS route data structures.
"It's what you learn after you know it all that counts." John Wooden