1. AASHTO, A.A. (2018). Side Friction. Geometric Design, 7, 143-144. Washington DC, USA. 〈https://www.webpages.uidaho.edu/niatt_labmanual/chapters/geometricdesign/professionalpractice/SideFriction.htm〉
2. AASHTO. (1994). Side Friction. Geometric Design, 143-144. Washigton DC, USA. 〈https://www.webpages.uidaho.edu/niatt_labmanual/chapters/geometricdesign/professionalpractice/SideFriction.htm〉
3. AASHTO. (2011). Relationship Between Speed and Geometric Design. USA: Federal Highway Administration Research and Technology. HYPERLINK "〈https://www.fhwa.dot.gov/publications/research/safety/17098/004.cfm〉" 〈https://www.fhwa.dot.gov/publications/research/safety/17098/004.cfm〉
4. Design of Superelevation of Highway Curves: An Overview and Distribution Methods;Abdulhafedh;Journal of City and Development,2019
5. Exploration of 85th percentile operating speed model on horizontal curve: a case study for two-lane rural highways;Abbas;Procedia – Social & Behavioral Sciences,2011