MANAGEMENT SYSTEM FOR PAVEMENT MAINTENANCE AND REHABILITATION BASED ON ANALYTIC METHODS OF PAVEMENT EVALUATION

A management system for pavement maintenance and rahabilitation developed in Denmark is described. The system uses nondestructive testing with a falling weight deflectometer and elastic layer theory to evaluate the structural condition of existing pavements. The functional condition is evaluated in terms of that mean square values of vertical acceleration, which can be directly related to road user costs. For a given budget, the optimum maintenance strategy is determined by using integer programming. The outputs from the system are (2) an inventory of the structural and functional condition of the existing road network, (b) lists of maintenance and rehabilitation measures to be carried out to ensure the maximum reduction in user costs in view of annual budget constraints over a 3-to 5-year period, (c) prediction of the changes to the future functional and structural condition of the road network caused by alterations in the available yearly budget, and (d) the future budget needed to minimize the combined costs to the highway agency and road users.