The A4174 is a major ring road in England which runs around the northern and eastern edge of Bristol, mainly in South Gloucestershire, and through the southern suburbs of the city. When it was first conceived it was planned to circle the whole of Bristol, and is commonly referred to as the "Avon Ring Road", or less accurately the "Bristol Ring Road", on road signs. The road does not circle the whole city, instead covering roughly half of the route. It is broken in part where it is concurrent with the A4.

South Gloucestershire is a unitary authority area in the ceremonial county of Gloucestershire, South West England. Towns in the area include Yate, Chipping Sodbury, Kingswood, Thornbury, Filton, Patchway and Bradley Stoke. The southern part of its area falls within the Greater Bristol urban area surrounding the city of Bristol.