Roundabouts reduce casualty crashes by 75% for all vehicles, yet when looking at motorcyclists in particular, they only reduce casualty crashes by 37%.

Our research shows that the top 10 road environment factors that influence risk for motorcyclists at roundabouts are:

  • geometric design
  • number of lanes 
  • sight distance 
  • lighting 
  • pavement markings 
  • signing 
  • landscaping 
  • street furniture 
  • speed limits  
  • surface issues 

Source: Beer K, Aninipoc E, Andrea D, Beer T, Making Roundabouts a Safe System Solution for Motorcyclists, ARSC 2014