This website presents a summary of the state-of-practice of geophysical imaging and NDT methods appropriate for a wide range of transportation problems. Advancements in computing capabilities, analysis software, graphic software, and survey methodology have contributed to significant gains in the value of geophysical and NDT methods, and have produced results that are more accurate and reliable than traditional approaches. Therefore, there is a need to provide geotechnical engineers with suitable geophysical tools to assist in the rational development of the survey methodology as well as in the selection of the appropriate methods, and interpretations.

Table 1 is prepared to provide an overview of suggested geophysical imaging and NDT methods used for highway geotechnical investigations, as described in Part I. These methods are listed in terms of engineering problems and applications of these technologies to highway design, construction, repair, and maintenance. The table is designed as a "Solution Matrix" that guides the user, without reading the entire web manual, to obtain an answer during the initial design phase of the survey. For more complex highway engineering problem, it is recommended that the user review specific sections to assess the most appropriate method(s) for solving highway engineering problems. Finally, the table has been organized in order of the subject material presented in the web manual