Transportation Engineering Research Reports, 1991

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Transportation Engineering Research Reports, 1991

The engineering research reports in the document resulted from the second year of the Undergraduate Transportation Engineering Fellows Program during the summer of 1991. The program design allows the students to interact directly with a faculty member or TTI researcher in developing a research proposal, conducting appropriate research, and documenting the research results. The compendium contains reports on a wide variety of transportation research. The first report discusses the development of a database and priority index for railroad-highway grade crossings. Readers interested in freeways operations will find reports of an evaluation of an inside merge at a major freeway-freeway connection and of a high volume merge operation. Another report contains a study of frontage road queuing and vehicle spacing at diamond interchanges. A study of the relationships between speed and geometric inconsistencies along rural highways is included, as well as an investigation of various operating characteristics of inductance loop detectors. One report contains information on forecasting turning flows, and another discusses lane closure guidelines for arterial street work zones. An examination of the indicators of congestion level also is included.