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CrashStats

SM4 road accidents: crash map and statistics

Police recorded 4,356 road traffic collisions in the SM4 postcode district, Merton, from 1982 to 2025, and 5,275 people were killed or injured in them. Of those collisions, 53 were fatal and 697 were serious.

In 2025 police recorded 63 collisions, up 15% on 2024 (55).

Collisions since 1982
4,356
751st highest of 2,813 postcode districts
Casualties
5,275
1.21 per collision
Fatal collisions
53
55 people killed
Serious collisions
697
762 seriously injured
Collisions in 2025
63
Up 15% on 2024
Casualties in 2025
72
Up 3% on 2024

Road collision statistics for SM4

Collisions by severity, 1982 to 2025

  • Fatal531.2%
  • Serious69716%
  • Slight3,60683%

What the data shows

  • SM4 had 730 collisions from 2016 to 2025, 3% fewer than the 749 from 2006 to 2015.
  • 17% of collisions in SM4 were fatal or serious, against 20% across Great Britain.
  • 637 children under 16 were killed or injured in SM4, 13% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 24% of collisions in SM4.

Where SM4 ranks among 2,813 postcode districts

Most collisions
751st
Most casualties
906th
Most fatal collisions
1,101st
Most serious collisions
953rd

Collisions by day of the week

  • Monday652 (15%)
  • Tuesday614 (14%)
  • Wednesday701 (16%)
  • Thursday693 (16%)
  • Friday680 (16%)
  • Saturday586 (13%)
  • Sunday430 (9.9%)

Light conditions

  • Daylight3,191 (73%)
  • Dark, street lights lit1,101 (25%)
  • Dark, lighting unknown54 (1.2%)
  • Dark, no street lighting5 (0.1%)
  • Dark, street lights unlit5 (0.1%)

Type of road

  • Single carriageway2,657 (61%)
  • Dual carriageway1,105 (25%)
  • Roundabout358 (8.2%)
  • One way street or slip road193 (4.4%)
  • Not recorded43 (1%)

Speed limit at the scene

  • 20 mph220 (5.1%)
  • 30 mph3,759 (86%)
  • 40 mph362 (8.3%)
  • 50 mph8 (0.2%)
  • 60 mph5 (0.1%)
  • 70 mph1 (under 0.1%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds3,518 (81%)
  • Raining, no high winds520 (12%)
  • Fine with high winds36 (0.8%)
  • Raining with high winds29 (0.7%)
  • Fog or mist15 (0.3%)
  • Snowing, no high winds15 (0.3%)
  • Snowing with high winds1 (under 0.1%)
  • Other75 (1.7%)
  • Not recorded147 (3.4%)

Who was hurt

  • Car occupant2,517 (48%)
  • Pedestrian981 (19%)
  • Motorcyclist774 (15%)
  • Cyclist521 (9.9%)
  • Bus or coach occupant274 (5.2%)
  • Van occupant117 (2.2%)
  • Taxi or private hire car occupant61 (1.2%)
  • Goods vehicle occupant (over 3.5 tonnes)12 (0.2%)
  • Other vehicle occupant11 (0.2%)
  • Minibus occupant1 (under 0.1%)
  • Not recorded6 (0.1%)

Source: Department for Transport, STATS19 road safety data

SM4 road accidents by year

Collisions and casualties in SM4, 1982 to 2025

Collisions in SM4 peaked at 159 in 1989; 2025 had 63.

  • Collisions
  • Collisions in 2025: 63
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20256372
20245570
20235669
20226674
202182104
20206264
201986107
201885100
201785100
201690108
201594119
201485107
20137995
2012107145
20116395
20105364
20097284
20086381
20076072
20067397
20057496
20047490
2003100124
200291117
200198111
2000107131
1999109135
1998119142
1997123137
1996115141
1995136158
1994117148
1993131152
1992120142
1991130155
1990136162
1989159190
1988130144
1987132155
1986135161
1985118140
1984140163
1983152193
1982131161

Map of recent crashes in SM4

Map of the 24 most recent crashes in SM4

Use the arrow keys to move the map and the plus and minus keys to zoom.

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SM4

The 24 most recent collisions in SM4 happened between 22 August and 31 December 2025.

Severity

Crashes by road in SM4

The A24 has the most collisions in SM4, 1,043 of 4,356 (24%), followed by the A297 (686).

Collisions in SM4 on each road, 1982 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA241,0431,21310163
2ndA29768689312116
3rdA21764682815106
4thB286323378349
5thA239290353242
6thB278216255143
7thB279167207230
8thA216101302
9thB223091002
10thA2793310

Council areas covering SM4

Collisions in SM4 were recorded in 2 council areas. Merton has 3,556 of 4,356 (82%).

Collisions in SM4 by council area, 1982 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stMerton3,5564,27641571
2ndSutton79899712125

Towns in SM4

Collisions in SM4 were recorded in 2 towns, led by Merton (3,270) and Sutton, Sutton (764).