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In Western Australia, Main Roads' policies, guidelines and standards take precedence over Austroads Guides and Standards Australia Standards. This Supplement has been developed to be read in conjunction with the Austroads Guide to Road Design (GRD) Part 3: Geometric Design (2016), a copy of which can be purchased via the Austroads website.

Appendix L Policy and Guidelines for Overtaking Lanes.

Appendix K Vertical Curve Curvature Formulae.

Appendix H Theory of Movement in a Circular Path.

Appendix G Flow Charts and Table for Determining Stopping Sight Distance Requirements for Curves with Barriers.

Appendix F Guidance for Wide Centreline Treatments.

Appendix E Narrow Median Treatments with Wire Rope Safety Barrier.

Appendix D Example Calculation of the Operating Speed Model.

Appendix B Emergency Aircraft Runway Strips.

Appendix A Extended Design Domain (EDD) for Geometric Road Design.

7.9 Pavement Widening on Horizontal Curves.7.6 Side Friction and Minimum Curves Sizes.Coordination of Horiztonal and Vertical Alignment 4.1A Seal and Shoulder Widths Across the State Road Network.3.8 Operating Speeds for Temporary Works (including sidetracks).