Alberta Infrasturcture and Transprotation (AIT) (2013). Roadside design guide, Edmonton,
                           AB.
                        
                      
                     
                        
                        American Association of State Highway and Transportation Officials (AASHTO) (2009).
                           Manual for assessing safety hardware, Washington, D.C.
                        
                      
                     
                        
                        American Association of State Highway and Transportation Officials (AASHTO) (2011).
                           Roadside design guide, Washington, D.C. pp. 4.1-4.17.
                        
                      
                     
                        
                        Bligh, R. P., Ross, H. E. and Bullard, D. L. (1994). Test and evaluation of arizona
                           slip-away base luminaire supports, FHWA-AZ94- 386, Texas Transportation Institute,
                           Texas.
                        
                      
                     
                        
                        British Standard (BS EN 12767) (2007). Passive safety of support structure for road
                           equipment-requirements, classification and test methods, UK.
                        
                      
                     
                        
                        Department of Infrastructure, Energy and Resources (DIER) (1996). Road hazard management
                           guide, RO-96-SC.204, Tasmania, Australia.
                        
                      
                     
                        
                        Dinitz, A. M. and Chisholm D. B. (1978). Development and testing of a breakaway support
                           coupling for light poles, Transportation Research Board, Transportation Research Record
                           679, Washington D. C., pp. 26-28.
                        
                      
                     
                        
                        Jang, D. Y., Park, J. S. and Joo, J. W. (2006). "Study on behavior analysis of vehicle-crash
                           cushion collision considering occupant safety." KSCE 2006 Convention Conference &
                           Civil Expo, Korean Society of Civil Engineers, Gwang-Ju, Korea, Vol. D.
                        
                      
                     
                        
                        Ko, M. G., Kim, K. D., No, M. H. and Yun, D. G. (2015). "Impact performance of crashworthy
                           post utilizing conservation of linear momentum." Journal of the Korea Academia-Industrial
                           Cooperation Society, Vol. 16, No. 12, pp. 8966-8976.

 
                     
                        
                        Korea Agency for Infrastructure Technology Advancement (KAIA) (2018). Development
                           of accident risk mitigating technology for vertical structure collision on road and
                           road workers (in Korean).
                        
                      
                     
                        
                        Ministry of Land, Infrastructure and Transport (MOLIT) (2014). Roadside design and
                           management (in Korean).
                        
                      
                     
                        
                        Ministry of Land, Infrastructure and Transport (MOLIT) (2015). Statistics, integrated
                           management center for road signs (in Korean).
                        
                      
                     
                        
                        Samsung Traffic Safety Research Institute (STSRI) (2015). A proposal on road-off collision
                           prevention and damage mitigation (in Korean).