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4 RESEARCH TASKS effort. This was a comprehensive analysis that considered advantages, limitations, purchase and operational costs, poten- The research project was conducted in two phases. The first tial problems, and other important features or considerations. phase was designed to identify the most promising alterna- The identification of the most promising technologies tives and to develop a work plan for testing under Phase II. included consideration of the wide range of instrumentation Phase II consisted of prototype development, testing, and doc- capability and proficiency within different transportation umentation. The specific research tasks defined to achieve the agencies throughout the United States. While some states research objective were as follows: would welcome very high-technology solutions and proce- dures, others may prefer a simpler approach. It was consid- Phase I ered unlikely that only one technique or procedure would be -- Task 1. Literature Review developed. -- Task 2. Identify Alternative Technologies Based on the findings from Tasks 1 and 2, the work plan -- Task 3. Work Plan for the Phase II research was refined and improved to better -- Task 4. Interim Report ensure a successful research effort (Task 3). The interim Phase II report presented the results of Tasks 1, 2, and 3, and provided -- Task 5. Prototype Development and Limited Testing the basis for discussion of the Phase II work effort with the -- Task 6. Detailed Field Testing NCHRP project panel. -- Task 7. User Manuals The objective of the Phase II research was to develop -- Task 8. Final Report prototype devices and conduct laboratory and field testing. Development of prototype devices was necessary to provide instrumentation for the testing program, which included lim- RESEARCH APPROACH ited testing during development (Task 5), and then more wide- spread testing in cooperation with state transportation agencies The purpose of Task 1 was to identify a wide range of tech- across the country (Task 6). The final results of the research nologies and procedures with either a direct or indirect rela- were documented in two reports, a users manual intended to tionship to portable scour monitoring. The next step was to provide enough information to replicate the preferred proto- sort through that information to identify the most promising type devices (Task 7), and the final report documenting the technologies that should be considered as part of this research entire research effort (Task 8).