Austroads Pavement Structural Design Guide

The Austroads Pavement Structural Design Guide is the basis for road pavement design in Australia and New Zealand.


Code of Practice. RC 500.22. Selection and design of pavements and surfacings. May 2018.

Vicroads has updated RC 500.22 to reflect changes in Austroads Guide to Pavement Technology – Part 2: Pavement Structural Design (AGPT02-17) (released in December 2017).

If Weigh in Motion data is not available or specified, Traffic Load Distributions (TLDs) as provided in Appendix B of the Code for the appropriate road class shall be used.  The 12 TLDs defined in Appendix B are pre-loaded into CIRCLY 7.0, as shown below:

This Code sets down VicRoads procedures for the selection and design of new road pavements and surfacing.

The Code includes important information on Selection of Asphalt Types and typical characteristics of asphalts commonly used by VicRoads.

You can download the Code from here.

CIRCLY 7.0 gives Reduced Asphalt Thickness for Heavy-Duty Structures

The following graph illustrates the considerable reduction in Asphalt thickness for pavements at higher traffic loads designed with CIRCLY 7.0 (using the Austroads 2017 Design Method), compared to CIRCLY 6.0 (using the Austroads 2004-12 Design Method).

This leads to reduced material and construction costs.

after Webinar presented on 9 March 2018 by Dr. Michael Moffatt (ARRB) – Pavement Design – Guide To Pavement Technology Parts 2 And 4C (2017 Editions)


CIRCLY 7.0 has just been released.

You can get an Overview of CIRCLY 7.0 by starting here.

Then click the Next > button at the bottom right hand corner on each page.

The Austroads Pavement Structural Design Guide has undergone a major revision that was released in December 2017.

The major change is how the details of the Traffic Load Distribution (TLD) are used as design inputs. The Traffic Load Distribution consists of the frequency distribution of Axle Group Loads.

Here’s an example of CIRCLY 7.0‘s Traffic Load Distribution screen:

CIRCLY 7.0 - Example Traffic Load Distribution

You can upgrade to CIRCLY 7.0  – at no extra cost if you have a current CIRCLY Annual Subscription.

2017 Austroads Pavement Structural Design Guide Released

Austroads Guide to Pavement Technology – Part 2: Pavement Structural Design (AGPT02-17) was released in December 2017.

2011 Austroads Pavement Evaluation and Treatment Design Guide Released

AGPT05-11 : Guide to Pavement Technology – Part 5: Pavement Evaluation and Treatment Design was released in December 2011.

This publication is an update of AGPT05-09. It contains an inclusion of thickness design for stabilisation treatments, and has also been reformatted which includes realigning the contents page and the lay out to make the information more accessible for the reader.

How to use Austroads Traffic Parameters in CIRCLY

Click here for an overview on how to use the various Austroads Traffic Parameters in CIRCLY.

RMS Supplement to Austroads Guide to Pavement Technology

This supplement is issued to clarify, add to, or modify the Austroads Guide to Pavement Technology, Part 2: Pavement Structural Design.

The RMS NSW accepts the principles in the Austroads Guide to Pavement Technology, Part 2: Pavement Structural Design with variations documented in this supplement under the following categories:

  • RMS Enhanced Practice: RMS practices which enhance the Austroads Guides.
  • RMS Complementary Material: These documents include RMS Manuals, Technical Directions and/or other reference material and are to be read in conjunction with the Austroads Guides.

Download from here.


Queensland Pavement Design Supplement

The Pavement Design Supplement sets out supplementary and specific requirements for the design of pavements for Main Roads. It includes Main Roads requirements for pavement types, reliability, subgrade assessment, climatic considerations, material characterisation, traffic, design and comparison of designs.

Further details here.

South Australia Pavement Design Supplement

Transport Services Division Pavement Design Supplement to the Austroads Guide to the Structural Design of Road Pavements.

The purpose of this Supplement is to provide more specific procedures and direction when using the Austroads methodology for the design of new pavements for the DTEI, Transport Services Division (TSD).

Download here. (Fourth Edition published October 2014).

Main Roads, Western Australia Pavement Design Supplement

The latest revision of Engineering Road Note 9 is May 2013.

See also – full list of Road Notes.

Important Warning- Heavy Duty Pavements

Performance data developed for highway pavements (e.g. Austroads) is not generally appropriate for heavy loadings such as airports and container terminals.   Use of such models can lead to grossly under-designed pavements.

For further details see the Heavy Duty Industrial Pavement Design Guide.