Presentation to the Local Authority Roads Conference 2014Treacy’s West County Hotel, Ennis

By Gavin O’Donnell, Arup 21 May 2014

Road Management GuidanceUpdate of the Orange Book 2014

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Speaker

• Gavin O’Donnell- NRA Standards Project Co-ordinator (2011-2014)- Associate Director, Arup- Chartered Engineer

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Agenda

• Overview

• Objectives

• Pavement Evaluation and Management

• Design Principles

• Materials for Use

• Other Minor Changes

• Appendices

• Best Practice Guide

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Overview

• Guidelines on the Depth of Overlay to be used on Rural Non-National Roads, First Edition, DOELG- First edition of the Orange Book published in May 1999- Provided a valuable and accessible user-guide for those

engaged in overlay design- Remained useful, but standards became dated over time

• Guidelines on the Depth of Overlay to be used on Rural Regional and Local Roads, Second Edition, DTTAS- Arup was engaged to review and update the First Edition- Delivered through a Technical Committee- Published in March 2014- Formally launched at today’s conference

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Objectives

• Initial Brief- Update to current EU and NRA DMRB Standards- Reference to historical documents- New methods and technologies- Materials advice- Appendices update

• Other Considerations- Additional context with other DTTAS initiatives inserted for

consistency (e.g. the Rural Flexible Roads Manual, etc.)- Document to remain as largely stand-alone (i.e. NRA

Specification extracts remain in appendices)- Expand guidance on materials and construction issues

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Pavement Evaluation and Management

• Chapter 2 – New Chapter

• Pavement Evaluation- Summary of the recent

procedure developments- ‘Regional Road Network

Pavement Condition Study Report’

- ‘Rural Flexible Roads Manual’

- Rating based on the PSCI (annual programme)

- Periodic visual inspection

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Pavement Evaluation and Management

• Condition Rating- Initial step of Network Level

Assessment- Linked to the PSCI rating system- Mechanical Data and Visual

Inspection used

• Treatment Measures by Condition Rating

- 1 & 2 - Road Reconstruction- 3 & 4 - Structural Overlay- 5 & 6 - Surface Restoration- 7 & 8 - Resealing and Restoration

of Skid Resistance

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Pavement Evaluation and Management

• Treatment Options- Resealing and Restoration of

Skid Resistance (Ratings 7 & 8) – addresses waterproofing & skid resistance where surface defects exist.

- Surface Restoration (Ratings 5 & 6) – addresses drainage, potholes & local strengthening of weak road edges.

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Pavement Evaluation and Management

• Treatment Options (Continued)- Structural Overlay (Ratings 3

& 4) – addresses regulation and overlaying of existing pavements, and drainage.

- Road Reconstruction (Ratings 1 & 2)– removal of existing pavement and replacement with new structural layers, and drainage.

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Pavement Evaluation and Management

• Flow Chart

• Assessment and Management Process

- Network Level- Mechanical Data

• Project Level Assessment- Site Inspection- Additional Data - Confirm PSCI- Other Issues (e.g. H&S,

Drainage, Visibility, etc.)

• Construction & Post Construction Assessment

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Design Principles

• Chapter 3- First Edition Chapters

2, 3, 4 & 5 combined, text / references update

- Focus on update to reflect NRA HD 25-26 Pavement and Foundation Design Standard

- Guidance on FWD methods updated (ref. Appendix A)

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Materials for Use

• Chapter 4 – New Chapter- Detailing the typical pavement layers- Material descriptions- Guidance linked to layers

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Materials for Use

• Summary Tables of Overlay Materials- Material Types- Advantages- Disadvantages- Factors / Conditions to Note

- Table 4.1 – Granular Unbound, Granular Bound and Cold Bituminous Mix Materials

- Table 4.2 – Hot Bituminous Materials

- Table 4.3 – Recycled Materials

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Materials for Use

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• Rational Overlay Design Solutions - Chapter 5 – Adaption of 1999 Chapter 6- Tables updated to include equivalent design traffic parameters

(in terms of msa)

• Drainage- Chapter 7 – Update of 1999 Chapter 8- Drainage guidance updated and reference documents added

• General Recommendations- Chapter 8 – Update of 1999 Chapter 9- Recommendations added regarding survey data & record

keeping, temporary traffic management and safety & health

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Other Minor Changes

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Appendices

• Appendix A – updated to include latest guidance on FWD testing

• Appendix B – reproduction of Sample Trial Pit Log

• Appendix C – updated App E to reflect new standards for Bituminous Material layer thicknesses

• Appendix D – update App C to reflect changes to the NRA Series 800 pavement specification requirements (see http://nrastandards.nra.ie or all NRA Standards and Specifications)

• Appendix E – reproduction of App D – Provisional specification for stabilised wet-mix macadam

• Appendix F – production of Best Practice Guide

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Best Practice Guide

• Appendix F expanded for Pavement Works Construction

• Significant input from Local Authorities to reflect the realities

• Notes on items to watch at various stages of the pavement construction process, including the items listed below

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Commencement Checks

Cold Milling Pavement Widening

Surface Dressing

Notes on Material Layers

Bituminous Joints

Kerbing Placing Chippings on HRA

Material Laying Tack/Bond Coat Quality and Testing

Completion Checks

High Friction Surfacing

Compaction

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Acknowledgements

• Technical Committee- DTTAS (John McCarthy)- NRA (John Fitzsimons and Eddie Winterlich)- Roscommon County Council (Greg O’Donnell)- Arup (Eoin Brennan, Peter Adams and Gavin O’Donnell) also

received inputs from Kieran Feighan, PMS.

• Local Authority Contributions- Cork County Council (Aidan Weir)- Donegal County Council (Stephen Flynn)- Kerry County Council (Frank Harnett)- Leitrim County Council (Seamus O’Connor)- Offaly County Council (Charles McCarthy)- South Tipperary County Council (Peter Britton)- Wexford County Council (Noel O’Driscoll)

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Queries

• For comments or queries, please note the contact details on the rear cover of the March 2014 Orange Book;

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Presentation to the Local Authority Roads Conference 2014Treacy’s West County Hotel, Ennis

By Gavin O’Donnell, Arup 21 May 2014

Road Management GuidanceUpdate of the Orange Book 2014

Thank You!