A420 road
The A420 is a road between Bristol and Oxford in England. Between Swindon and Oxford it is a primary route. Present route Since the opening of the M4 motorway, the road has been in two sections. The first section begins on Old Market Street near the centre of Bristol and passes through Kingswood before leaving the city on the east side. From here it travels eastward over the southern part of the Cotswolds, to the north of Bath, to Chippenham in Wiltshire. The second section begins at a junction with the A419 east of Swindon. It then travels under the Great Western Main Line at the twin-arch Acorn Bridge and by-passes Shrivenham (the road originally went through Shrivenham, but the by-pass was built in the mid-1980s) and Watchfield, then on towards Faringdon in the Vale of White Horse. A further by-pass section, opened in 1979, avoids the centre of Faringdon, passing just south of Folly Hill and crossing the A417. The A420 then travels the corallian limestone ridge that forms the north-west boundary of the Vale of White Horse, passing Littleworth, Buckland and Longworth. A dual-carriageway section by-passes Southmoor and Kingston Bagpuize on its way to Oxford. Most of the