Safety evaluation of horizontal curvature and horizontal alignment design consistency I ppt


This presentation will cover Reducing Roadway Departure Crashes at Horizontal Curve Sections on Two-Lane Rural Highways, which used the RID as a stand-alone database to create roadway departure crash modification factors (CMFs) for 1) combinations of horizontal curve radius, superelevation (including superelevation rate and presence of normal crown), and speed limit combinations representing side friction demand and 2) measures of horizontal alignment design consistency, including modified change radius rate and ratio of tangent length to radius. The studies resulted in quantitative safety performance information that can be used in support of design policy and design criteria applications.


Yusuf Mohamedshah | Research Highway Safety Specialist | FHWA

Ian Hamilton | Transportation Planner | VHB, Inc.