Flying Roadside Stones—a Deadly Risk in a Crash




stones, fatal, roadside hazard


The crash of a coach with 58 occupants at 100 kmph revealed the danger of covering ditch areas with sharp stones 5–20 cm in size. Stones and dirt were sprayed into the coach compartment resulting in serious injuries and death. Road safety works need to address this factor in the future.


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Author Biographies

Ulf Björnstig, Umeå University, Sweden

Ulf Björnstig is a trauma and general surgeon at Umeå University (recently retired), with focus on trauma care, injury prevention and disaster medicine. Has also been Traffic Safety Director at the National Road Administration 1998-2000, Director of Emergency Medical Service (EMS) in County of Västerbotten, and has also experience as EMS and traffic safety consultant in Arabic and Eastern European countries, as well as medical expert of the National Accident Investigation Board.

Johanna Björnstig, Umeå University, Sweden

Johanna Björnstig is a research assistant with many years experience of running the injury database at Umeå University Hospital including collecting and analyzing data, as well as producing reports, for example the "Annual Traffic Injury Report’ based on hospital data. Today she is active at the Disaster Medical Center at Umeå University.


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SHK (2015) Olycka med buss i beställningstrafik på riksväg 27 söder om Tranemo tätort, Västra Götalands län, den 4 december 2014. Swedish Accident Investigation Authority. Report RO 2015:02:




How to Cite

Björnstig, U., & Björnstig, J. (2021). Flying Roadside Stones—a Deadly Risk in a Crash. Traffic Safety Research, 1, 000002.