The Austroads Guide to Road Design seeks to capture the contemporary road design practice of member organisations (Guide to Road Design Part 1: Introduction to Road Design, Austroads 2015a). In doing so, it provides valuable guidance to designers in the production of safe, economical and efficient road designs.
The Guide to Road Design Part 4B: Roundabouts (AGRD Part 4B) provides guidance to road designers on the geometric design of roundabouts and together with three other parts:
- Part 4: Intersections and Crossings – General (AGRD Part 4) (Austroads 2009a)
- Part 4A: Unsignalised and Signalised Intersections (AGRD Part 4A) (Austroads 2010a)
- Part 4C: Interchanges (AGRD Part 4C) (Austroads 2015c).
Provide guidance on the geometric design of intersections and crossings.
AGRD Part 4 covers intersection design principles that apply generally to intersections and crossings and the other three parts provide guidance specifically related to the type of intersection.
Figure 1.1 shows the eight guides that comprise the Austroads Guide to Road Design. Collectively these parts provide information on a range of disciplines including geometric design, drainage, roadside design, and geotechnical design, all of which may influence the location and design of intersections.