Magic Roundabout (Swindon) be reconfigured while the layout was fine tuned. A police officer was stationed at each mini roundabout during this pilot phase to oversee how drivers coped with the unique arrangement. The roundabout is built over a section of the old Wilts and Berks Canal – Swindon wharf. A narrow, stone bridge built c. 1810, which is a grade II listed building, carried the old Saxon way known as Drove Road over the canal half a mile east of the town centre. Its site became covered by Drove Roundabout, which was later redeveloped as the Magic Roundabout. A wharf occupied one
Roundabout flow on bridges, which are two viaducts creating a roundabout suspended over the ring road. Signal controlled roundabouts are common in the United Kingdom, Ireland and Spain (mostly the city of Valencia), where they have been introduced in an attempt to alleviate traffic problems at over-capacity roundabout junctions or to prevent some flows of traffic dominating others (around the M50 in Dublin for example). The Cherry Street roundabout in Kowloon, Hong Kong is also one such example. "Magic roundabouts" direct traffic in both directions around the central island. They are officially known as "ring junctions". The first magic roundabout was