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This report concerns an Investigation of the occurrence and distribution of selected highway factors within regional geomorphic units comprising the adjacent Lt.8 states. The regional classification system used as a basis of examination was that proposed by Woods-Lovell. This system was slightly modified to produce 97 Sections for investigation. The highway factors analyzed by Section were: availability of quality aggregate resources, soil origin and texture, high voliime change soils, potentially poor subgrade support conditions (clayey and organic type) and frost susceptible soils. A generalized evaluation of the utility of using Physiographic Sections as information filing units for the highway factors was also conducted. Several generalized national maps were developed to aid in the analysis of the factors considered. Potential aggregate maps of the United States were compiled and used along with various other sources of information, including a state hia'hway aggregate questionnaire, to obtain a qualitative estimate of the potential aggregate availability

A Generalized Investigation of Selected Highway Design and Construction Factors by Regional Geomorphic Units within the Continental United States