Civil Engineering Association

Use of Geophysics for Transportation Projects

This synthesis presents the state of the practice regarding the use of geophysics for transportation projects. The report focuses on U.S. state and Canadian provincial departments of transportation (DOTs), and U.S. federal transportation agencies. The main points addressed include who is using geophysics and why, which methods and applications are the most commonly used, the use of in-house expertise compared with contracting private consultants, and how geophysical service contracts are procured and implemented. The scope was limited to how geophysics is being applied by geotechnical engineers during highway planning and construction activities. The information included in this synthesis was obtained from a review of the published literature; a survey of all 50 state DOTs, the District of Columbia, Canadian provinces, and selected federal government agencies; and follow-up telephone interviews designed to clarify or expand on particular aspects of some survey responses.

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