I spent last week surveying the Slovenian segment of the itinerary. Now the definition of this part of the road is much more clear and I will be able to give you some updates in the next weeks.
In the meanwhile, here is the 3D scanning of the milestone preserved in the center of Ivancna Gorica. The scanning was made with 15 pictures and through the use of SfM techniques: want to know more? Read this paper!