Basic intersection crash performance Input Analysis Period (in years) Input # of Fatal Crashes at Intersection (Not # of Persons Killed) Input # of 'A' Severity Crashes at Intersection Input # of 'B' Severity Crashes at Intersection Input # of 'C' Severity Crashes at Intersection Input # of Property Damage Crashes at Intersection Input Average # of Vehicles Entering Intersection Daily * *Average number of vehicles entering intersection can be calculated by adding ADTs for all of the intersection legs, and then dividing that by 2. This assumes that directional split of the roadway for the average day is 50/50. Intersection Crash Rate = per million entering vehicles Intersection Severity Rate = Intersection Crash Density = crashes per year
Basic segment crash performance Input Analysis Period (in years) Input # of Fatal Crashes on Segment (Not # of Persons Killed) Input # of 'A' Severity Crashes on Segment Input # of 'B' Severity Crashes on Segment Input # of 'C' Severity Crashes on Segment Input # of Property Damage Crashes on Segment Input Segment Length (in miles) Input Average Daily Traffic for Segment Segment Crash Rate = per million vehicle-miles Segment Severity Rate = Segment Crash Density = crashes per mile per year
