Atrans is the Roman name for Trojane, a town in Central Slovenia. It was on the border between Italy and the province of Noricum.
Ancient Romans built a road spanning Aquileia, Emona, Atrans and Celeia. This was a very important road, military, post and market place, and the town was surrounded by a defensive wall.
The archaeological remains of Atrans can be still seen.
References
Atrans Wikipedia(Text) CC BY-SA