1. Henessy DA, Wiesenthal DL (1997) The relationship between traffic congestion, driver stress and direct versus indirect coping behaviours. Ergonomics 40(3):341–348
2. Dias C, Miska M, Kuwahara M, Warita H (2009) Relationship between congestion and traffic accidents on expressways: an investigation with bayesian belief networks. In: Proceedings of 40th annual meeting of infrastructure planning (JSCE)
3. Marchesini P, Weijermars W (2010) The relationship between road safety and congestion on motorways. Research report (https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&cad=rja&uact=8&ved=2ahUKEwjU9_ixovzeAhWKaFAKHdBZDH4QFjAHegQIAhAC&url=https%3A%2F%2Fwww.swov.nl%2Fsites%2Fdefault%2Ffiles%2Fpublicaties%2Frapport%2Fr-2010-12.pdf&usg=AOvVaw2l395JNB7ZwWAadkyfh58S). Retrieved on 30.11.2018
4. Gao P, Hensley R, Zielke A (2014) A road map to the future for the auto industry. McKinsey study. Retrieved on 20161118 on
http://www.mckinsey.com/industries/automotive-and-assembly/our-insights/a-road-map-to-the-future-for-the-auto-industry
5. Spiegel Online (2018) Dieselfahrverbot in Stuttgart—Was Autofahrer jetzt wissen sollten.
http://www.spiegel.de/auto/aktuell/stuttgart-die-wichtigsten-fragen-zum-diesel-fahrverbot-a-1217930.html
. Retrieved on 11.07.2018