The A307 road runs 13.2 miles (21.2 km) through SW London and NW Surrey. It is primary at the north-east end; the remainder is non-primary, generally superseded in the mid-twentieth century in two stages by newer alignments of the Portsmouth Road, the Kingston bypass and Esher bypass of the A3, which runs along a slightly oblique axis.

The A3, known as the Portsmouth Road or London Road in sections, is a major road connecting the City of London and Portsmouth passing close to Kingston upon Thames, Guildford, Haslemere and Petersfield. For much of its 67-mile (108 km) length, it is classified as a trunk road and therefore managed by National Highways. Almost all of the road has been built to dual carriageway standards or wider. Apart from bypass sections in London, the road travels in a southwest direction and, after Liss, south-southwest.