Richtlinien für die Anlage von Strassen, RAS. Teil: Linienführung (RAS-L). Abschnitt I: Elemente der Linienführung. RAS-L-1. Ausgabe 1984.

In these specifications the rules for the alignment of roads in urban and rural areas are collected. Principles, methods, as well as values for limits and standards for the layout of highways in and outside built- up areas are discussed. In this part the geometric development of theroad alignment, the traffic lane and the design speed are discussed in particular.