1. Albin, R., Brinkly, V., Cheung, J., Julian, F., Satterfield, C., Stein, W., Donnell, E., McGee, H., Holzem, A., Albee, M., Wood, J., Hanscom, F., 2016. Low-Cost Treatments for Horizontal Curve Safety 2016. Washington, D.C.
2. American Association of State Highway and Transportation Officials, 2009. HIGHWAY SAFETY MANUAL, 1st ed. Washington DC.
3. Safety Evaluation of Improved Curve Delineation;Amjadi,2009
4. Anarkooli, A.J., Persaud, B., Hosseinpour, M., Saleem, T., 2019. Comparison of univariate and two-stage approaches for estimating crash frequency by severity—Case study for horizontal curves on two-lane rural roads. Accid. Anal. Prev. 129 August 2018 , 382–389. doi:10.1016/j.aap.2018.08.015.
5. Effective safety factors on horizontal curves of two-lane highways;Aram;J. Appl. Sci.,2010