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Abstract:The objective of the research was to review the existing bridge formula to find if modifications could be suggested to make it more rational. The intent was to more fully utilize the capacity of existing bridges without significantly shortening the service life of any. A brief study of the influence the proposed formula would have on pavement fatigue was accomplished. For most practical heavy vehicles, the formula would result in a greater number of equivalent axle loads per vehicle. A detailed study of the effect the adoption of the proposed bridge formula would have on pavements is recommended. Such a study should consider costs, benefits, and potential formula modifications.
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