Validation of Accident Models for Intersections

2005Bared, JoePDFTech ReportFHWA-RD-03-037DTFH61-00-C-00073Crash modification factorsSignalized intersectionsTraffic safetyUnited StatesUnited States. Federal Highway AdministrationWashington, SimonPersaud, BhagwantLyon, CraigOh, JutaekUnited States. Federal Highway AdministrationUniversity of Arizona. Dept. of Civil EngineeringRyerson University. Department of Civil EngineeringBared, Joe G.Federal Highway AdministrationThis report describes the results of validation and calibration of motor vehicle crash models for rural intersections. Both the validation and recalibration activities were conducted in pursuit of one overriding research objective, which was to make marginal improvements to an existing set of statistical models for predicting crashes at two and four lane intersections, with the primary intent to be used in the Interactive Highway Safety Design Module (IHSDM). The five types of intersection models for which conclusions are drawn and recommendations are made are: Three-legged stop controlled intersections of two-lane roads; four-legged stop controlled intersections of two-lane roads; three-legged stop controlled intersections with two lanes on minor and four lanes on major road; and four-legged stop controlled intersections with two lanes on minor and four lanes on major road, and signalized intersections of two-lane roads.79