The purpose of this paper is to review the development of precast prestressed concrete panels as permanent structurally interacting forms in the construction of reinforced concrete decks for stringer type bridges. This system was used on the Illinois Toll Highway in 1957. In 1963 Texas constructed three bridges in this manner. Many bridges have been subsequently completed using this slab construction technique. Precast prestressed concrete panels are placed to form a deck between adjacent stringers. A mat of reinforcing steel is placed and concrete is cast-in-place on top of the panels. The panels support the weight of the wet concrete and then act compositely with it to resist subsequent live loads. Design of the panel deck system is explained and several aspects of fabrication and construction are reviewed./Author/