March 26, 2014
The Minnesota Department of Transportation (MnDOT) meets many recommended practices for selecting between bituminous and concrete pavement types in road rehabilitation projects, but it needs to make improvements. For example, MnDOT should quantify certain user costs (such as travelers’ time-delay costs associated with driving though work zones) and costs of MnDOT engineering and contract administration. MnDOT should compare those cost estimates, along with its analyses of pavement life-cycle costs, among each pavement alternative it considers. MnDOT should also change its alternate bidding process—used when projects are open to bidding from contractors in both bituminous and concrete industries—to make it cost-effective.
Office of the Legislative Auditor ♦ Room 140, 658 Cedar St., St. Paul, MN 55155