Geometric Design Consistency on High-Speed Rural Two-Lane Roadways

TRB’s National Cooperative Highway Research Program (NCHRP) Report 502: Geometric Design Consistency on High-Speed Rural Two-Lane Roadways presents rules on geometric design consistency suitable for use in an expert system such as the Interactive Highway Safety Design Model (IHSDM). The rules can also be used directly by a designer to evaluate roadway designs or to conduct reviews of existing roadways, in order to help improve design consistency and safety.