Austroads developments in skid resistance
This presentation is the property of its rightful owner.
Sponsored Links
1 / 23

Austroads developments in skid resistance PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on
  • Presentation posted in: General

Austroads developments in skid resistance. Kym Neaylon, ARRB Dr Young Choi, ARRB. Outline. Introduce Austroads 3 Austroads projects 1. New policy guidelines for the management of skid resistance 2. Review of measurement methods 3. Reference stone for the Australian PAFV test

Download Presentation

Austroads developments in skid resistance

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Austroads developments in skid resistance

Austroads developments in skid resistance

Kym Neaylon, ARRB

Dr Young Choi, ARRB


Outline

Outline

  • Introduce Austroads

  • 3 Austroads projects

    • 1. New policy guidelines for the management of skid resistance

    • 2. Review of measurement methods

    • 3. Reference stone for the Australian PAFV test

      • The PAFV/PSV test and today's traffic?


Austroads

Austroads

Comprises

  • All Australian state and territory road transport and traffic authorities

  • Commonwealth department of infrastructure and transport

  • Australian local government association

  • NZ transport agency


Austroads1

Austroads

Purpose

  • Provide expert advice

  • Facilitate collaboration

  • Promote harmonisation, consistency and uniformity

  • Undertake strategic research

  • Promote improved and consistent practices


Austroads2

Austroads

Typical process for research work

  • Various committees identify research needs

  • Project scoped and approved

  • Workshop held for stakeholder views

  • Project group established - nominations from each state

  • ARRB undertakes research with input from the project group


Recent austroads skid publications

Recent Austroads skid publications

2005 Guidelines

2009 Skid resistance

2009 Texture

2011 Policy

All downloadable from www.austroads.com.au publications


2011 guide for development of policy

2011 Guide for development of policy

Skid monitoring programs and investigatory limits

  • Are based on UK systems

  • Australian climate, traffic intensity, road network different

  • A single approach does not fit all Australia

    ‘Zones of Regional similarities’ developed

  • Rainfall

  • Population

  • Topography

  • Traffic

  • Climate


Zones of regional similarity

Zones of regional similarity


Zones of regional similarity1

Zones of regional similarity

9


Review of measurement methods

Review of measurement methods

Literature review (in publication)

Factors

  • Slip ratio

  • Slip speed

  • Water film thickness

  • Test tyre

  • Temperature

  • Etc…..

  • Every device varies!


Review of measurement methods1

Review of measurement methods

Correlation and harmonisation exercises

  • Australian & New Zealand, 2000, 2003, 2005

  • PIARC in 1990s

    • 47 measurement devices

    • 16 countries

    • 67 parameters

    • IFI

  • HERMES in 2000s

    • 15 measurement devices

    • 5 countries

    • EFI


Review of measurement methods2

Review of measurement methods

Correlation and harmonisation exercises cont.

  • TYROSAFE in 2007

    • European consortium

    • Reviewed previous projects

    • Concluded there is no scale or system that can harmonise

    • Standardisation is the ultimate degree of harmonisation


Review of measurement methods3

Review of measurement methods

What now for Australia?

  • Harmonisation trials abandoned

  • Jurisdictions to carefully choose their testing device

  • Then retain its use over a long period of time

  • Different testing devices are appropriate for different zones

  • Monitored calibration exercises for all

    • SCRIMs

    • GripTesters

    • British pendulum testers


Psv test and pafv test

PSV test and PAFV test

  • Quirky Australian history of 1960s

    ( see Appendix A of Austroads (2011) Guidance for the Development of Policy to Manage Skid Resistance)


Psv and pafv tests

PSV and PAFV tests

  • Australian PAFV test ≈ rest of world’s PSV test

  • British stone, grit and tyres were to expensive to procure in Aust

  • PAFV developed mid 1970s as a surrogate for PSV

  • Different reference stone, grit and tyres → PAFV

  • Designed to closely replicate PSV

  • Most states use vertical wheel

  • One state uses a horizontal bed

Photo: R. Yeo

Photo: AS 1141.41 – 1984 (superseded)


Reference stone for pafv test

Reference stone for PAFV test

  • Australian PAFV test ≈ rest of world’s PSV test

  • Not only a different test, but also a different reference stone.

  • Stockpiles of reference stone developed 30 years ago are now depleted

  • Austroads has decided to re-adopt the UK reference stone.

  • PAFV/PSV test still has a number of years remaining

  • Austroads running proficiency studies, correlation, etc


The psv test and today s traffic

The PSV test and today's traffic

  • PSV test developed about 65 years ago

  • Questions:

    • Different traffic stresses now?

    • Many questions on relationship with road on-site performance!

    • Relationship to crashes?

  • Alternatives?


Wehner schulze test

Wehner Schulze test?

Photos: K Neaylon


Micro deval with aggregate imaging

Micro-Deval with aggregate imaging?

Photos: Robert Myers Associates

Photos: Pine instruments


Ncat three wheel polisher with ctm

NCAT three wheel polisher with CTM?

Photo: NCAT

Photo: D Wilson


Any other alternatives to psv

Any other alternatives to PSV?

?


Conclusion partnerships in practice

Conclusion: “partnerships in practice”

  • Skid resistance in Australia relies on partnerships

    • Stakeholders

    • Jurisdictions

    • Working groups are used extensively

    • Draw on world wide activities

  • Australia believes it has a variety of local conditions

    • International solutions adapted, before they are adopted.

  • Australia needs to participate within the international community


For more information

For more information

Contact:

Kym Neaylon

National Technical Leader

Sustainable Infrastructure Science

ARRB Group

Melbourne, Australia

[email protected]

Telephone: +61 (3) 9881 1629

Mobile: +61 (4) 3043 7172


  • Login