The A237 is an A road in South London

South London

South London is the southern part of London, England, United Kingdom.According to the 2011 official Boundary Commission for England definition, South London includes the London boroughs of Bexley, Bromley, Croydon, Greenwich, Kingston, Lambeth, Lewisham, Merton, Southwark, Sutton and...

. It runs from the west side of Mitcham Common

Mitcham Common

Mitcham Common or Seven Islands is 182 hectares of common land situated in South London. It is predominantly in the London borough of Merton, with parts straddling the borders with Sutton and Croydon.- History :...

 to Coulsdon

Coulsdon

Coulsdon is a town on the southernmost boundary of the London Borough of Croydon. It is surrounded by the Metropolitan Green Belt of the Farthing Down, Coulsdon Common and Kenley Common...

. It crosses through 2 London Boroughs which includes the start inside the London Borough of Merton

London Borough of Merton

The London Borough of Merton is a borough in southwest London, England.The borough was formed under the London Government Act in 1965 by the merger of the Municipal Borough of Mitcham, the Municipal Borough of Wimbledon and the Merton and Morden Urban District, all formerly within Surrey...

 and the ending of the road inside the London Borough of Croydon

London Borough of Croydon

The London Borough of Croydon is a London borough in South London, England and is part of Outer London. It covers an area of and is the largest London borough by population. It is the southernmost borough of London. At its centre is the historic town of Croydon from which the borough takes its name...

. The road ends at a busy junction with the A23 which soon carries on to the M23

M23 motorway

The M23 motorway is a motorway in England. The motorway runs from south of Hooley in Surrey, where it splits from the A23, to Pease Pottage, south of Crawley in West Sussex where it rejoins the A23. The northern end of the motorway starts at junction 7 on what is effectively a spur north from...

.

The road passes 3 mainline train stations, Mitcham Junction station

Mitcham Junction station

Mitcham Junction is a National Rail station served by First Capital Connect and Southern trains, and a Tramlink stop. It is in the London Borough of Merton and is in Travelcard Zone 4.The station opened on 1 October 1868...

 (also a Tramlink

Tramlink

Tramlink is a tramway system in south London in the United Kingdom which began operation in May 2000...

 stop), Hackbridge railway station

Hackbridge railway station

Hackbridge railway station is a railway station at Hackbridge in the London Borough of Sutton in South London. The station is served by First Capital Connect and Southern trains...

 and Wallington railway station

Wallington railway station

Wallington railway station is in the London Borough of Sutton in south London. The station, and all trains serving it, is operated by Southern, and is in Travelcard Zone 5....

.