I think deprecating mini_roundabout is incorrect.
Near where I live in Chorley England a 3 way junction was converted to a
mini-roundabout to equalise the flow of traffic. The space available
made a build roundabout impractical, and traffic lights would have been
overkill. It works. It is different on the ground that a built
roundabout (tin of poured paint versus brick and kerbing). The map is
appropriately different - mini-roundabout has its own symbol whereas a
roundabout is sized to reflect its actual size.
Understanding of mini_roundabouts (how to build complex junctions) and
their distinctiveness may be helped by viewing
https://en.wikipedia.org/wiki/Magic_Roundabout_(Swindon)
and its OSM representation
https://www.openstreetmap.org/#map=18/51.56273/-1.76929&layers=N
The nearby Drakes roundabout is a large roundabout identified only by
its shape
Regards
TonyS999
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