Magic Roundabout (Hemel Hempstead) a New Town the roads met in a simple junction which was then replaced by a standard roundabout. Constructed in 1973, the "Magic Roundabout" in Hemel Hempstead was voted the UK's second-worst roundabout in a 2005 poll held by an insurance company (the winner being its Swindon counterpart). In 2011 the roundabout was voted the best in Britain by motorists in a competition organised by a car leasing service. The original magic roundabout had six exits in total, with the British Petroleum building spanning "Marlowes", the road leading to the town centre, in the approximate position of the earlier railway
Roundabout roundabouts employ multiple configurations. At the Barrière de St-Gilles/Bareel St-Gillis, tram tracks form a circle in the carriageway, while Verboekhoven and Altitude Cent/Hoogte Honderd have reserved tram tracks inside the roundabout. At Place Stéphanie/Stefaniaplein, they go straight through the center, with a slip track up the Chaussée de Charleroi/Charleroisesteenweg, while at Montgomery they tunnel underneath. In Dublin, Ireland, the Red Cow interchange at the N7/M50 junction is grade-separated and is signal-controlled with secondary lanes (separate from the main roundabout) for those making left turns. The junction, the busiest in Ireland, had tram lines added to it with the opening of