1. Highway Safety Manual;AASHTO,2010
2. Effective safety factors on horizontal curves of two-lane highways;Aram;Journal of Applied Sciences,2010
3. Bonneson, J., et al., 2007. Horizontal Curve Signing Handbook. TTI Technical Report. Texas Transportation Institute, College Station, Texas.
4. The role of attention in horizontal curves: a comparison of advance warning, delineation, and road marking treatments;Charlton;Accident Analysis and Prevention,2007
5. Simplifying Delineator Applications for Horizontal Curves. Transportation Research Record, vol. 1918;Chrysler,2005