The development of Australia's flexible pavement road deterioration (RD) models

The long-term pavement performance (LTPP) observational study conducted from 1994 to 2018, in conjunction with the accelerated loading facility (ALF) experimental data, has developed robust deterministic mechanistic-empirical road deterioration models for the gradual deterioration phase for flexible pavement arterial roads in Australia. The RD models for rutting and roughness have statistically significant explanatory variables that cover potential changes in traffic load, climate and surface maintenance treatments. These models, along with the cracking and structural deterioration models are being adapted, by means of local calibration and adjustments, to PMSs operated by state road agencies for their arterial road networks. The local calibration can account for local conditions of pavement drainage and soil moisture as well as the reactive nature of some soils. A recent upgrade of the rutting and roughness RD models, using relative performance factors for surface maintenance treatments, accounts for the discrete impact of different surface maintenance treatments on the rate of deterioration. This has improved the utility of the RD models that no longer rely on an estimate of the average annual surface maintenance expenditure ($/lane-km) variable, me, based on the year 2000 costs. As noted, the RD models will be further refined by 2022 with additional LTPP observational data from Australia and New Zealand.


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  • Accession Number: 01763385
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • Files: ATRI
  • Created Date: Feb 4 2021 10:29AM