Road Design
- Publication no: AP-R660-21
- ISBN: 978-1-922700-02-5
- Published: 26 November 2021
- PDF (free) Download
Road Authorities, practitioners and other stakeholders have identified minor editorial issues within the Austroads Guide to Road Design (GRD) Part 3 that result in possible ambiguity or inconsistency within the Guides to Road Design Series.
A total of eight minor issues were identified within the GRD Part 3. The issues were investigated to deliver changes that updates existing or adds new guidance.
Existing available information (for example documentation held by road authorities and industry, captured learning / experiences, overseas information where information from a local context is not available) was used to develop the possible solutions.
Through a series of workshops and written feedback the Road Design Task Force undertook reviews of the updated and provided input to confirm the preferred update.
The proposed changes incorporate new or updated wording and figures to be implemented in future updates of the GRD Part 3.
- Summary
- 1. Introduction
- 1.1 Purpose
- 1.2 Scope
- 1.3 Methodology
- 2. Overtaking Lane Tapers
- 2.1 Issue
- 2.2 Requirement
- 2.3 References
- 2.4 Initial Research
- 2.5 Road Design Task Force Feedback
- 2.6 Austroads Guide to Road Design Update
- 2.6.1 New Wording in Section 9.4
- 2.6.2 New Wording in Section 9.9.1
- 2.6.3 New Wording in Section 9.9.2
- 2.6.4 New Commentary 23
- 2.6.5 Updated Figures
- 3. Horizontal Curves – Sight Distance
- 3.1 Issue
- 3.2 Requirement
- 3.3 References
- 3.4 Initial Research
- 3.5 Road Design Task Force Feedback
- 3.6 Austroads Guide to Road Design Update
- 3.6.1 New Section 5.4.2
- 4. Mutual Visibility at Freeway Merges – Inconsistency/Ambiguity
- 4.1 Issue
- 4.2 Requirement
- 4.3 References
- 4.4 Initial Research
- 4.5 Road Design Task Force Feedback
- 4.6 Austroads Guide to Road Design Update
- 4.6.1 New Wording in GRD Part 4C Section 7.4
- 4.6.2 Updated Table 7.2
- 5. Median Width for Barrier Installation and for Wide Centre Line Treatments
- 5.1 Issue
- 5.2 Requirement
- 5.3 References
- 5.4 Initial Research
- 5.5 Road Design Task Force Feedback
- 5.6 Austroads Guide to Road Design Update
- 5.6.1 New Wording in Section 4.7.1
- 6. Dimensioning of Lane Widths
- 6.1 Issue
- 6.2 Requirement
- 6.3 References
- 6.4 Initial Research
- 6.5 Road Design Task Force Feedback
- 6.6 Austroads Guide to Road Design Update
- 6.6.1 New Wording in Section 4.2.4
- 6.6.2 Updated Notes to Tables 4.4, 4.5 and 4.6
- 7. Lane and Shoulder Widths
- 7.1 Issue
- 7.2 Requirement
- 7.3 References
- 7.4 Initial Research
- 7.5 Road Design Task Force Feedback
- 7.6 Austroads Guide to Road Design Update
- 7.6.1 New Wording in Section 4.2.5
- 8. Intersection Design Detail
- 8.1 Issue
- 9. Semi Mountable Kerb with Backing Strip
- 9.1 Issue
- 9.2 Requirement
- 9.3 References
- 9.4 Initial Research
- 9.5 Road Design Task Force Feedback
- 9.6 Austroads Guide to Road Design Update
- 9.6.1 New Wording in Section 4.6.4
- 10. Conclusions and Recommendations
- 10.1 Conclusions
- 10.2 Recommendations
- References
- Appendix A Commentary 23
- A.1 C23.1 Lane Merge Geometry
- A.2 C23.2 Merges on Left-Hand Curves
- Appendix B Wide Centre Line Treatment Guidance