Primary concerns of a pavement maintenance management system (PMMS) include determining the kind of treatment appropriate to periodic maintenance and classifying sections by priority order. A rational method is presented for selecting maintenance treatment solutions based on (a) pavement performance as exhibited by indexes of visual distress rating by the Washington survey method; (b) structural capacity evaluated by non destructive testing using a falling weight deflectometer; and (c) roughness determined by the present service ability rating. Unlike PMMS applied in some parts of the world, this system refers individually and quantitatively to each index separately, considering its engineering significance and allowing calculation of the necessary structural strengthening. The method is based on the classification of road network sections by a decision tree. At each intersection, classification is performed per index suitable to the criteria under consideration. After the sections are classified, each section is assigned its appropriate treatment out of a treatment inventory available at the maintenance department. Determination of the treatments' economic feasibility and order of priority is based on the net present value and the internal rate of return of cost flows of periodic and routine maintenance and vehicle operation costs. (A)
Abstract