Colorado study increases rehabilitated road life expectancy by 2 years

Asphalt rehabilitation projects using a 2-inch mill and overlay approach are now expected to last even longer. Research by the Colorado Department of Transportation (CDOT) indicates a life expectancy of 12 years for these projects. Ten years was previously considered the accepted life-cycle.

The study analyzed performance data from many projects and evaluated multiple rehabilitation strategies. As a result, CDOT enacted a policy change that increases the life expectancy of asphalt mill and mill overlays from 10 years to 12 years regarding life-cost analyses.

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