Evaluating safety and operation of high-speed intersections

654853106Final report.PDFTech ReportFHWA-OR-RD-10-15SPR 660Speed zonesSignalized intersectionsRural highwaysInterchangesIntersectionsOregonOregon. Dept. of Transportation. Research SectionDixon, Karen K.Kopper, Neilvan Schalkwyk, IdaOregon State University. School of Civil and Construction EngineeringOregon. Transportation Development Branch. Policy UnitUnited States. Federal Highway AdministrationUS Transportation CollectionThis Final Report reviews a research effort to evaluate the safety and operations of high-speed intersections in the State ofOregon. In particular, this research effort focuses on four-leg, signalized intersections with speed limits of 45 mph orgreater where the intersections are not in the immediate vicinity of other signalized intersections. This report includes aliterature review of high-speed intersection safety treatment strategies, a description of the research methodology used inthis project, and a summary of final results. The final results include crash conditions at these high-speed intersections, aformat for evaluating safety at these and similar intersections, a hierarchy of safety treatment options, and a demonstrationof the use of these tools through example analyses of eight Oregon intersections