The purpose of this district is to provide areas for the location of office and research facilities in conjunction with production and/or assembly of prototype products. The requirements of this district are intended to provide protection from the adverse impacts of uses within the district upon adjacent properties. The types of uses permitted within this district with the restrictions placed upon them make this district suitable for location near residential districts. Access to this district should be directly from an arterial or collector street and not through a residential district. Hotels, motels and similar uses should be located peripheral to the district or in other locations that do not adversely effect the setting and quality of the uses within the district.