30) is a free part of the federal highways corridors (Spanish: los corredores carreteros federales).

40 in the southwest and winds across the central Mexican Plateau, following a roughly northeasterly direction.

The highway eventually ends to the northeast in Monclova, Coahuila at Fed. 57.

30 trunk runs from Torreón to Monclova at a length of 332.3 km (206.5 mi).

At San Pedro de las Colonias, an additional 18.7 km (11.6 mi) spur reconnects Fed.