A cooperative study initiated in 1983 by the Federal Highway Administration and the Ohio Department of Transportation is described in this paper. Its purpose was to establish cost and performance data for various rehabilitation strategies in Ohio. The study consisted of ten projects: four concrete overlays, one modified concrete pavement restoration, three thick asphaltic concrete overlays constructed over cracked and seated portland cement concrete pavements, one thin asphaltic concrete overlay constructed on an undersealed concrete pavement with newly added concrete shoulders, and a 6-in. asphaltic concrete overlay constructed over a badly D-cracked pavement with minimal joint repair. The construction operations have been documented and the performance of each project is being monitored periodically. Monitoring includes condition rating, cracking survey, Dynaflect testing, and roughness measurements. However, only projects with concrete overlay and concrete shoulders are of relevance to this paper and will be discussed.
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