A suitable life cycle cost analysis procedure for comparing the economics of eight different projects that were treated with five different rehabilitation methods generally used in ohio is described. Because the initial condition of each pavement included in the studywas different, it was necessary to adjust for this condition so that different pavements could be compared on an equitable basis. Initial salvage value was used for this purpose. Also, the daily traffic was different on each project. Therefore, service cost index, defined as the ratio of daily traffic to life cycle cost (in multiples of $1, 000) was used for comparing the benefits and costs of each project or rehabilitation method used in this study. Analysis of data usedin this study indicated that composite overlays were more cost-effective than unbonded rigid overlays for pavements subjected to high levels of daily traffic. Unbonded rigid overlays were also relativelyless cost-effective than asphalt concrete (ac) overlays for low levels of daily traffic conditions. Crack and seat with ac overlay was more cost-effective under medium-to-high levels than under medium-to-low levels of traffic. Concrete pavement restoration was most expensive. Results of the analysis indicated that the procedure describedis a reasonable method of comparing the life cycle costs of variousrehabilitation methods used in ohio. This paper appears in transportation research record no. 1307, Pavement analysis, design, rehabilitation, and environmental factors 1991.
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