Impact of Intersection Angle on Highway Safety

The preferred design for conventional intersections includes adjacent legs that intersect at 90 degrees. However, there are occasions when physical constraints result in intersection angles less than 90 degrees and thus produce skewed intersections. Skewed intersections may create potential safety and operational problems for both motorists and non-motorists. To date, the research on problems related to skewed intersections has been limited, which may explain the lack of consensus among the policies and guidance that now exists in practice. The objective of this study was to derive quantitative relationships between intersection angle and safety for which intersection crashes define safety. The relationships…