Unlike today, the river Main meandered considerably in antiquity. The Limes road in the hinterland shortened the path of the river bends and connected the forts of Seligenstadt, Stockstadt, Niedernberg and Obernburg in what was often a dead-straight line. From Obernburg, the Limes road followed the course of the Main to the south.

Inland roads led from the fortresses in Seligenstadt, Stockstadt and Niedernberg to Dieburg, the main city of the "civitas Auderiensium" in the hinterland.

Course in the south:
From the mouth of the Mümling the Limes road climbed to the heights of the Odenwald in order to access the older Odenwald Limes. The alteration of the Limes' course around 160 AD made it necessary to direct the Limes road over the Greinberg at Miltenberg and to follow the course of the southern Limes.

Course in the north:
The Limes road crossed the Main at Fort Großkrotzenburg on a stone pylon bridge that was built around 140 AD. The Main Limes met the Wetterau Limes at this point.

Literature:
Steidl 2008, 74ff.