The development and application of a procedure for estimating rehabilitation and maintenance costs for the Texas pavement network are described. Key elements of the methodology include a clustering mechanism for partitioning the network into climatically homogeneous regions; determination of serviceability and distress characteristics on the basis of the S-shaped performance function; evaluation of pavement failure probabilities using the Weibull distribution; and determination of rehabilitation, routine maintenance, and preventive maintenance costs by means of least-squares regression modelling. Using this computerised methodology, the Texas State Department of Highways and Public Transportation is able to project state-wide costs of repair over a specified planning horizon, for pavements with asphaltic concrete on aggregate or bituminous base and asphaltic concrete overlays. Results of an application of the methodology to a selected texas climatic region are discussed.
Samenvatting