A roundabout is a circular intersection which allows traffic to flow continuously in one direction around a central island to other intersecting roads. Roundabouts, in their modern form were standardised in England following WWII.
Now that you’re an expert on roundabouts, here’s how it’s possible to have a picnic without the fear of being run over by other traffic driving around the circle. Years ago cars were allowed in this area that has since been converted into a pedestrian friendly botanical picnic area with NO motorized traffic allowed.
Be sure to see the Florida Key’s ONLY roundabout picnic area at Dagny Johnson Botanical State Park. To find this head on US-1 to Mile Marker 107.0 turning onto Card Sound Road and going north for only one mile on your right.