1. Europe on the Move. Sustainable Mobility for Europe: Safe, Connected, and Clean
https://eur-lex.europa.eu/resource.html?uri=cellar%3A0e8b694e-59b5-11e8-ab41-01aa75ed71a1.0003.02/DOC_1&format=PDF
2. EU Road Safety Policy Framework 2021–2030—Next Steps towards “Vision Zero”
https://ec.europa.eu/transport/sites/transport/files/legislation/swd20190283-roadsafety-vision-zero.pdf
3. System Approach in Road Safety Studies
4. DG Energy and Transport, High Level Group Road Safety. Road Infrastructure Safety Management
http://www.expertas.de/01_en/02_docs/020_EC_SafetyManagement03_en/safety_manag.pdf
5. The Handbook of Road Safety Measures;Elvik,2004