Optimum Microscopic Model for Management of Pavement Maintenance and Rehabilitation (05-0260) - MP-02
Khaled A. Abaza, Birzeit University, Palestine

A pavement management model has been developed using a microscopic approach to yield optimum pavement conditions for a given pavement system. The maintenance and rehabilitation variables used in the developed microscopic approach are integer variables representing the numbers of pavement sections to be treated in the various qualifying pavement classes. In contrast, the maintenance and rehabilitation variables in the macroscopic approach represent the proportions of pavements to be treated in the various classes. The microscopic approach requires the identification of each pavement section and rating individually its pavement distress condition. The pavement management problem is formulated as a constrained integer linear optimization model subjected to budget and improvement requirement constraints. The objective of yielding optimum pavement conditions is achieved by either considering the net pavement condition rating gain or age-gain applied to a given pavement system. In either approach, the optimization model can be formulated to maximize pavement conditions or minimize maintenance and rehabilitation costs. Data requirements include rating the pavement distress of each pavement section, providing cost rates and performance parameters for the deployed maintenance and rehabilitation actions, and specifying anticipated budget and pavement improvement requirements. Sample results from a case study have indicated that the developed model is very effective in yielding optimum pavement conditions.