Paper 1: Experience gained from existing continuously reinforced concrete pavements is now adequate to suggest certain design principles. Paper 2: In the fall of 1956, the Pennsylvania Department of Highways constructed the first of two experimental continuously-reinforced concrete pavements. The first of these projects is on route 111, near York. In this project, measurements are being made of the strain in the bar-mat reinforcing steel in a uniform 9-in. pavement. Studies are also being conducted on the crack frequency, the crack width, and the slab temperature. A theory governing the behavior, the details of construction and instrumentation, and the results obtained during the first two months of the pavement's life are described.