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\section{Introduction}  Roundabouts are relatively new designs for intersections intersection traffic management  in North America with America. With  considerable promises in terms of safety, as well as capacity. capacity from abroad, roundabouts are a staple of European road design and many studies have demonstrated reductions in accident probability and accident severity, particularly in Denmark \cite{Jensen_2013}, Sweden, TODO.  However, questions still remain regarding the feasibility of introducing the roundabout to regions were driving culture is and road design philosophy differs and where drivers are  not habituated to driving around them. their use.  This road user aspect  isa  crucialaspect  for the implementation of their implementation:  roundabouts as must manage  traffic conflicts passively, for road user interactions  are managed handled  entirely by person-to-person interactions instead the road users by way  of yielding behaviour and driving etiquette. This is in contrast with typical intersections managed by  traffic-light controllers or even police traffic controllers. And while roundabouts share much in common with 4 and 2-way stops, they are still frequently used for high-capacity, even high-speed intersections which would not normally use 4  and resistance 2-way stops. Resistance  to adoption in some areas is still high. important, particularly from vulnerable users.  And while a number of studies cite reductions in accidents rates, they do not provide microscopic details about the inner mechanics of driving behaviour that surrogate safety analysis provides which might be key to adapting roundabout designs for different driving cultures.