Statistics indicate that accidents at signalized intersections have become a significant safety problem throughout the United States. Right-angle collisions are ranked highest in terms of severity at signalized intersections, while their frequency is second only to rear-end collisions. One key component that is lacking is a tool to help identify excessive risk of right-angle collisions. This paper proposes a practical method to evaluate the frequency of right-angle collisions on the basis of the frequency of short postencroachment times (PET). PET and crash data collected from signalized intersections in Indiana were used to calibrate right-angle crash prediction models. Regression results reveal that PET frequency is a key determinant of right-angle crashes and is capable of discriminating varying safety levels within a location as well as across locations. Several evaluation examples are presented to illustrate how the method can be used and how the estimation results can be interpreted.
Practical Method for Estimating Frequency of Right-Angle Collisions at Traffic Signals
Transportation Research Record
Transportation Research Record: Journal of the Transportation Research Board ; 1953 , 1 ; 89-97
2006-01-01
Article (Journal)
Electronic Resource
English
Practical Method for Estimating Frequency of Right-Angle Collisions at Traffic Signals
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