1. AASHTO. Roadside design guide. 4th ed. Washington, DC: American Association of State Highway and Transportation Officials; 2002.
2. Revised chapter 6: median Barriers, AASHTO roadside design guide,2005
3. AASHTO MASH-1. Manual for Assessing Safety Hardware (MASH). American Association of State Highway Transportation Officials. 1st ed.; 2009.
4. AASHTO MASH-2. Manual for Assessing Safety Hardware (MASH). American association of state highway transportation officials. 2st edition; 2016.
5. Finite-element modeling of G2 guardrail;Hendricks;Transp Res Rec,1996