A roundabout is a circular junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction
Circular junctions existed before roundabouts, including the Circus in the city of Bath, Somerset, England completed in 1768, part of a world heritage site.
Widespread use of the modern roundabout began when the UK's Transport research Laboratory engineers re-engineered and standardised circular intersections during the 1960s. Frank Blackmore led the development of the "Priority Rule" and subsequently invented the mini-roundabout to overcome capacity and safety limitations. The priority rule was found to improve traffic flow by up to 10%. The design became mandatory in the United Kingdom for all new roundabouts in November 1966.
1. The sign at the top of the page is an example of a sign which you would see on the approach to roundabouts on "A" roads and explains where each exit goes too.
2. You woud find the sign below on the approach to a mini roundabout
3. The sign at the sign in the red triangle signals that there is a roundabout ahead
4. The video at the very bottom is an examplle of how to approach a roundabout taking the first exit.
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