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\item Roundabouts are large enough that they can and often do contain \textbf{multiple independant road user interactions simultanously}. For example, a motorist approaching the roundabout depicted in Figure~\ref{fig:roundabout-quadrants} from the North-West section can do so independantly of any movement occuring inside of the South-Eeast section. This isn't strictly true for all interactions however; particular care should be taken at the transitionary zone between sections.  \end{itemize}  These sections are termed \textit{quadrants} as they cut the most-common configuration of roundabout, a four-way roundabout, into four sections using two axes of similtude. Though other configurations do exist, the general principle still applies: a quadrant is defined as the section of a roundabout delimited by an approach and the next immidiate exit, bounding a central weaving zone (depicted in Figure~\ref{fig:roundabout-weaving-zone}) where the approach and exits lanes overlap with the lanes of the central ring, and where ring. In this zone, road users experience  the most complex motorist types of conflicts: rear-end, lane-change (if a multi-lane roundabout),  and cyclist interactions weaving conflicts. These weaving conflicts  are expected unique  to occur. roundabouts and the key aspect of the yielding behaviour that governs right-of-way of the intersection as a whole.  Pedestrian-motorist interactions are expected at conflicts normally do not overlap with the weaving zone as the  crosswalksacross each approach and exit, but because these movements  are protected normally set back from the roundabout  by median, they a couple of car-lengths. Interactions between users, motorists and pedestrians alike, located on an approach and an adjacent exist, and vica versa,  can be bounded considered independant from one another as they are normally always seperated  by the same quadrant. a median.  Nevertheless, some factors, particularly factors related to the built environment, are still treated as site-wide.