The A3220 is a primary A road in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

. It runs north from Clapham Common

Clapham Common

Clapham Common is an 89 hectare triangular area of grassland situated in south London, England. It was historically common land for the parishes of Battersea and Clapham, but was converted to parkland under the terms of the Metropolitan Commons Act 1878.43 hectares of the common are within the...

 to the A40

A40 road

The A40 is a major trunk road connecting London to Fishguard, Wales and officially called The London to Fishguard Trunk Road in all legal documents and Acts...

 Westway

Westway (London)

The Westway is a long elevated dual carriageway section of the A40 route in west London running from Paddington to North Kensington. The road was constructed between 1964 and 1970 to relieve congestion at Shepherd's Bush caused by traffic from Western Avenue struggling to enter central London on...

 at Ladbroke Grove

Ladbroke Grove

Ladbroke Grove is a road in west London, in the Royal Borough of Kensington and Chelsea. It is also sometimes the name given informally to the immediate area surrounding the road. Running from Notting Hill in the south to Kensal Green in the north, it is located in North Kensington and straddles...

.

The road crosses the River Thames

River Thames

The River Thames flows through southern England. It is the longest river entirely in England and the second longest in the United Kingdom. While it is best known because its lower reaches flow through central London, the river flows alongside several other towns and cities, including Oxford,...

 at Battersea Bridge

Battersea Bridge

Battersea Bridge is a cast-iron and granite five-span cantilever bridge crossing the River Thames in London, England. It is situated on a sharp bend in the river, and links Battersea south of the river with Chelsea to the north...

 and from this point until its end it forms the western boundary of the London Congestion Charge

London congestion charge

The London congestion charge is a fee charged for some categories of motor vehicle to travel at certain times within the Congestion Charge Zone , a traffic area in London. The charge aims to reduce congestion, and raise investment funds for London's transport system...

 zone. Turning left at the northern end of the bridge, the A3220 follows the northern bank of the Thames for some 500 m before swinging northwestward and becoming two separate roads as part of a one-way system

One-way traffic

One-way traffic is traffic that moves in a single direction. A one-way street is a street either facilitating only one-way traffic, or designed to direct vehicles to move in one direction.-General signs:...

. 500 m after crossing the A315, the route returns to being a standard bidirectional single-carriageway

Single carriageway

A single carriageway is a road with 1, 2 or more lanes arranged within a single carriageway with no central reservation to separate opposing flows of traffic. Two-lane road or two-lane highway are single carriageway with one lane for each direction...

 road for some 750 m as far as the Holland Park

Holland Park

Holland Park is a district and a public park in the Royal Borough of Kensington and Chelsea, in west central London, England.Holland Park has a reputation as an affluent and fashionable area, known for attractive large Victorian townhouses, and high-class shopping and restaurants...

 roundabout, from where it forms the dual-carriageway

Dual carriageway

A dual carriageway is a class of highway with two carriageways for traffic travelling in opposite directions separated by a central reservation...

 West Cross Route

West Cross Route

The West Cross Route is a short, dual carriageway section of the A3220 route in central London in The Royal Borough of Kensington and Chelsea, with a small part being shared with borderlining borough Hammersmith and Fulham. It runs north-south between the northern elevated roundabout junction...

, formerly the M41 motorway.