Abstract: A method of replacing an existing roadway on structure in which at least one of the lanes of the roadway is cut into rectilinear sections during a first nonpeak traffic period. The sections are left in place, and temporary traffic bearing members are positioned over the cuts to permit the flow of traffic over all of the lanes of the roadway during an ensuing peak traffic period. Orthotropic roadway modules are preformed and paved at a factory or other remote location, and each of these modules has a width equal to that of the one lane. During a second nonpeak traffic period one or more of the modules is transported to the site, the traffic bearing members and the rectilinear sections are removed and the module is connected in place. The foregoing steps are repeated during successive traffic periods until the entire roadway has been replaced.