The purpose of the research was to identify operational problems occurring on cloverleaf interchanges and to recommend low cost remedial treatments (short of major redesign and reconstruction) with potential for alleviating such problems. Since the problems and remedial treatments were identified via observation and field data collection, an additional goal of the research was to develop a troubleshooting guide to be used by traffic engineering personnel in identifying the nature and extent of operational problems. These goals were not fully met due to the lack of an adequate range of operational problems on sites identified via survey as "problem" sites. This report documents problems which were identified along with the recommended remedial treatments. Although production of a fully developed troubleshooting guide was not possible, the documentation of the problem identification procedures does provide a methodology useful to traffic engineers in identifying and solving cloverleaf problems. /FHWA/.
Abstract