1. 1. Cova T.J., Conger S.: Transportation Hazards. Transp. Eng. Handb., No. 801, 2003.
2. 2. Treat JR et al.: Tri-Level Study of the Causes of Traffic Accidents. Res. Rep. Compil. by Inst. Res. Public Saf. to US Separtment Transp. Washingt. DC, 1979.
3. 3. Vogel L., Bester C.J.: A relationship between accident types and causes. Proc. 24th South. African Transp. Conf., 2005.
4. 4. PIARC: Road accident investigation guidelines for road engineers. 2007.
5. 5. The Institution of Engineering and Technology: Glossary of Safety Terminology. No. 00, 2017.