New Road was built in 1769-70 as a new turnpike road between central Oxford and the west. It bypassed the earlier and narrower Hythe Bridge Street to the north and St. Thomas's High Street to the south. It was built through what remained of the northern outer ramparts and ditch of Oxford Castle, but Christ Church, Oxford preserved the 11th-century castle mount "as a venerable monument of antiquity". From 1790 there was a coal wharf at the end of the Oxford Canal on the north side of New Road. Nuffield College was built on the site of the wharf between 1951 and 1960. The canal is now truncated on the north side of Hythe Bridge Street. County Hall was built just east of Oxford Castle in 1840-41. The architect John Plowman designed it in a NormanRevival style with crenellations to complement the castle. St. Peter-le-Bailey Parish School was built in 1849 on the corner of New Road and Tidmarsh Lane. Increasing traffic on New Road made this an unsatisfactory site for a school so in 1898 an appeal was launched for funds to move to new premises. This enabled the school to relocate to a site in New Inn Hall Street. In 1911-12 new offices for the County Council's Education Department were built on the former school site. The architect W.A. Daft designed the building, which is of yellow brick with yellow Bath Stonequoins and other details and topped by a cupola. It is now the Oxfordshire County Register Office. The Oxfordshire Militia Armoury and Drill Hall was built just west of the castle in 1854. It too was designed with crenellations to complement the castle, in this case by J.C. Buckler. After 1857 the building was transferred to the newly founded Oxfordshire County Constabulary as its headquarters. In 1969 it was demolished and replaced by Macclesfield House, a building of precast concrete which until the 2000s was one of the offices of Oxfordshire County Council. On the north side of New Road is a small Gothic Revival building designed by Charles Buckeridge and built in 1863. It was first a court house, then the Probate Registry, and is now private offices. Early in the 1970s, Castle Street was realigned and New County Hall was built on the corner of Castle Street and New Road. New County Hall, like Macclesfield House, was designed by the Oxfordshire County Architect.