A3 road (Great Britain)

A3
Route information
Length	72 mi (116 km)
Major junctions
North-east end	City of London 51°30′39″N 0°05′12″W / 51.5108°N 0.0866°W / 51.5108; -0.0866 (A3 road (northern end))
Major intersections	A2 A23 A24 A205 M25 A31 A3(M) A27 M27 M275
South-west end	Portsmouth Harbour 50°47′30″N 1°06′31″W / 50.7918°N 1.1086°W / 50.7918; -1.1086 (A3 road (southern end))
Location
Country	United Kingdom
Primary destinations	Kingston upon Thames Guildford Petersfield
Road network
Roads in the United Kingdom Motorways A and B road zones
← A2 A4 →

The A3, also called the Portsmouth Road or London Road in some parts, is a major road that connects the City of London to Portsmouth. It passes near places like Kingston upon Thames, Guildford, Haslemere, and Petersfield. The road is 67 miles (108 km) long and is mostly a trunk road, which means it is managed by National Highways. Almost the entire road is a dual carriageway or wider. Except for some bypasses in London, the road generally heads southwest, and after Liss, it goes south-southwest.