Conceptual Plan for an Interactive Highway Safety Design Model

摘要

The report presents a conceptual plan for an interactive highway safety design(HSD) model under consideration for development by FHWA. The IHSD model is intended as a tool that could be used by a designer or design reviewer to assess the safety effects of specific highway geometric design decisions. The model would be interactive in that it would allow the designer to make changes in the geometric design and evaluate the safety effects of those changes as part of a single software package. A key element of the IHSD model would be an accident predictive model incorporating statistical relationships between geometric design elements and safety. Separate submodels would be provided for roadway sections, intersections, interchange ramps and speed-change lanes, and roadside areas. the IHSD model would also include modules for design policy review, design consistency review, benefit-cost analyses, driver vehicle/dynamics simulation, and graphical displays of roadway geometrics. The report includes a research plan for the development of the IHSD model.