A study to compare the "maintenance and rehabilitation schedules of concrete versus asphalt" that included a life-cycle cost analysis found the performance of both materials was comparable up to the point where more than 2,000 trucks used the roads daily. The study was commissioned by Canada's Ready Mix Concrete Association of Ontario. "The report really confirmed that the initial construction costs between concrete and asphalt can be very similar," said Mick Prieur, senior pavement engineer with RMCAO. "Over the long run, concrete is definitely cheaper for maintaining." Iowa is one state that has recognized the savings -- it has "a 60% market share in concrete now since they’ve looked into life-cycle costing for the state."