Magic Roundabout (Hemel Hempstead) viaduct. The BP building was found to be unstable due to defective reinforced concrete and the exit had to be closed. The building was demolished but the original route was not restored, although a newer side exit from the roundabout replaced the junction with Marlowes off a side road. Magic Roundabout (Hemel Hempstead) The "Magic Roundabout" in Hemel Hempstead, Hertfordshire, England, is the familiar name given to the Plough roundabout. The familiar name comes from the children's television programme, and is also used for a similar junction in Swindon and the M40 junction in Denham. The official name relates to
Road transport in Peterborough to a roundabout for local traffic. The road then becomes a major dual carriageway, although it has only one grade separated junction (with the A47), with the other junctions being roundabouts. In 2008, Peterborough City Council funded the dualling of the northernmost stretch of the Paston Parkway between two roundabouts east of Gunthorpe. This has significantly reduced congestion, as the route is used as a commuter run between the city's Eastern Industry development in Fengate and settlements north of the city. The A15 moves southward as a minor dual carriageway from its junction with the A47 with several more roundabouts