This paper provides a general summary of the results from a series of network pavement life-cycle costing (PLCC) model analyses, that included road user costs, relevant to asset management of pavements on Australian road networks at both a state and local roads level. The network PLCC model analyses results presented cover trends in the estimated maximum network level roughness and annual maintenance and rehabilitation budget with variations in the vehicle lane kilometres travelled per day on each road network at the point where the minimum total life-cycle cost (optimum) is achieved. The resulting trends for annual maintenance and rehabilitation allocations to each of the major road types comprising each network are presented and discussed. In addition, an incremental cost and benefit approach to estimating sub-optimal annual budgets, that is, reduced budgets that produce total life-cycle costs that are higher than the minimum, is discussed with the consequential changes to the maximum network level roughness and budget allocations to the roads comprising each network. (A)
Abstract