This report provides a comprehensive summary of the updates made to the Austroads Guide to Road Design.

Guide to Road Design Part 7: New and Emerging Treatments contains design-related knowledge, findings from research and practical experiences about new and emerging treatments.

Guide to Road Design Part 6B: Roadside Environment contains information on the components of roadside areas that may need to be accommodated within a road reserve.

The Austroads Guide to Road Design Part 4: Intersections and Crossings: General contains guidance that provides road designers and other practitioners with information that is common to the geometric design of all at-grade intersections.

The Guide to Road Design Part 6A: Paths for Walking and Cycling provides guidance for designers and other practitioners on the design of paths for safe and efficient walking and cycling, both within the road corridor and outside the road corridor.

The Austroads Guide to Road Design Part 4A: Unsignalised and Signalised Intersections provides road designers and other practitioners with guidance on the detailed geometric design of all at-grade intersections (excluding roundabouts).

Guide to Road Design Part 3: Geometric Design provides road designers and other practitioners with information about the geometric design of road alignments.

Guide to Road Design Part 6: Roadside Design, Safety and Barriers provides guidance on roadside design and in particular guidance on evaluating the risk of a roadside and the selection and use of road safety barrier systems.

Guide to Road Design Part 1 provides practitioners with a detailed description of the critical aspects of road design.

The purpose of this report is to re-evaluate the working widths for concrete barriers currently used by Australian and New Zealand road agencies and document the background behind the recommended revised working widths for the Austroads Guide to