Dynamic Horizontal Curve Warning Sign Impacts
Keith K. Knapp1
Three dynamic/interactive horizontal curve warning signs were installed in May 2010 along local
county roadways within Minnesota. This work is part of a nationally funded research project on
local rural roadway safety. It is funded by the USDOT Federal Highway Administration Rural
Safety Innovation Program (RSIP), the Minnesota Department of Transportation, and the
University of Minnesota. The process and criteria followed to select the rural sign installation
study sites, without the existence of significant crash data, will be described as part of this
presentation. In addition, the sign selection methodology and the lessons learned during the sign
installation will be noted. Finally, the vehicle speed data collected one month before and after
the sign installation, five to six months after, and one year after the sign installations will be
summarized. This will be an ongoing project at the time of the symposium but the potential
meaning of the draft findings will be discussed.
Key words: rural safety, ITS
1
Director, Iowa Local Technical Assistance Program, 2711 South Loop Drive, Suite 4700, Ames, IA 50010, Tel:
515-294-8817, Fax: 515-294-0467, Email: kknapp@iastate.edu