The Milch Main Road is the road that is west of the City of Rolent and east of the Verte Bridge on the map. It also connects to the Perzel Farm to the south as well. There is a western section, eastern section, and central section of the road.
The road is passed many times for many side missions and when Estelle and Joshua need to get to the Perzel Farm. It is also passed when they need to get to Bose with Scherazard to investigate the missing airliner.