SEAHC Demonstration Projects

Under the FHWA Surface Enhancements At Horizontal Curves (SEAHC) effort, demonstration projects have been installed in eight states to date to determine the effect of HFS on reducing crash rates on horizontal curves. The states participating in this effort identified specific horizontal curves with high crash rates that could benefit from the installation of HFS, and installations have been completed in Summer 2009 through Summer 2011.  More detailed information about the demonstrations in each state.