Asset management

Cover of Long-term Pavement Performance Study: Final Report
Long-term Pavement Performance Study: Final Report
  • Publication no: AP-T342-19
  • ISBN: 978-1-925671-96-4
  • Published: 22 January 2019

This report summarises the outputs and benefits of the long‑term pavement performance (LTPP) study which ran from 1994 to 2018 and was funded by Austroads. The study had four primary objectives:

  • to enhance road asset management strategies by  using improved pavement performance models
  • to compare the performance of a range of  Australian pavement sections with United States (US) sections that had been  established under the Strategic Highway Research Program Long Term Pavement  Performance (SHRP-LTPP) Program
  • to compare the performance of accelerated  loading facility (ALF) test pavements with actual road pavement  performance
  • to investigate the quantitative influence that  various maintenance surface treatments had on long-term pavement performance,  as determined by the long-term pavement performance maintenance (LTPPM) portion  of the study.

These objectives were achieved using the LTPP and LTPPM observational data, which was collected from a range of in‑service pavement sites specifically set up for the study, in combination with the data obtained from other sources such as ALF and participating road agencies. The ALF experimental data was used to separately investigate the impact of increased axle loads on long‑term pavement performance. The data was also used in road deterioration modelling of flexible pavements.

The LTPP data is available on

  • Summary
  • 1.      Introduction
    • 1.1    Background
    • 1.2    Aims of the Study
  • 2.      Data Collection and Compilation
    • 2.1    General
    • 2.2    Site Establishment
    • 2.3    Monitoring of LTPP and LTPPM Sites
      • 2.3.1      Monitoring Frequency
      • 2.3.2      Monitoring Regime
      • 2.3.3      Traffic and Maintenance History
      • 2.3.4      Site Characteristics
  • 3.      Data Processing and Analysis
    • 3.1    Data Processing
    • 3.2    Estimation of Progression Rates
  • 4.      Discussion
    • 4.1    Monitoring – Lessons Learnt
    • 4.2    Pavement Performance
      • 4.2.1      Historical Performance Curves
      • 4.2.2      Progression Rates
  • 5.      Summary and Conclusions
    • 5.1    Project Activities
    • 5.2    Benefits of the Study
    • 5.3    Concluding Remarks
    • 5.4    Future Use of LTPP Data
  • References
  • Appendix A          LTPP and LTPPM Monitoring
  • Appendix B          Maintenance and Rehabilitation History
  • Appendix C          Performance Trends – LTPP Sites
  • Appendix D          Performance Trends – LTPPM Sites
  • Appendix E          Estimation of Underlying Rate of Deterioration
  • Appendix F           Load Transfer Efficiency (LTE) of LTPP Rigid Pavements