This paper presents some of the technical considerations that underlie the development of the master plan and the establishment of design specifications for Ohio's Highway Research Laboratory. It describes the overall features of the master plan and discusses some of the critical design features as these relate to the various tracks and other field facilities.The development of the master plan was guided by a study of the layout of existing proving grounds and by the experience gained over the years in their operations. It was guided furthermore by a set of principles relating to operational considerations, considerations of flexibility in the layout, land utilization, safety, capacity, and cost. Finally, it was guided by an indication of future research and development needs as expressed by researchers and potential sponsors in both government and industry.Similar guidelines were followed in the establishment of overall design specifications for the various tracks, field structures, and buildings. Design specifications related to the geometry, structural features, and safety were considered as being of prime importance, while specifications for operational controls, data collection and transmission systems, and provision of utilities were considered as being of secondary importance.