1. AASHTO (American Association of State Highway and Transportation Officials) 1976. Guidelines for Skid Resistant Pavement Design. Washington DC.
2. Blackburn R.R. D.W. Harwood A.D. John and M.C. Sharp 1978. Effectiveness of Alternate Skid Reduction Measures-Volume 1: Evaluation of Accident Rate-Skid Number Relationships. FHWA-RD-79-22 FHWA Washington DC.
3. Wet and Wild: Developing and Evaluating an Automated Wet-Pavement Motorist Warning System
4. KYTC (Commonwealth of Kentucky Transportation Cabinet). 2011. Kentucky Roadway Departure Safety Implementation Plans. FHWA-SA-11-20. U.S. Department of Transportation Washington DC.