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CrashStats

SW20 road accidents: crash map and statistics

Police recorded 3,492 road traffic collisions in the SW20 postcode district, Merton, from 1982 to 2025, and 4,292 people were killed or injured in them. Of those collisions, 45 were fatal and 521 were serious.

In 2025 police recorded 62 collisions, up 29% on 2024 (48).

Collisions since 1982
3,492
1,092nd highest of 2,813 postcode districts
Casualties
4,292
1.23 per collision
Fatal collisions
45
47 people killed
Serious collisions
521
563 seriously injured
Collisions in 2025
62
Up 29% on 2024
Casualties in 2025
71
Up 37% on 2024

Road collision statistics for SW20

Collisions by severity, 1982 to 2025

  • Fatal451.3%
  • Serious52115%
  • Slight2,92684%

What the data shows

  • SW20 had 542 collisions from 2016 to 2025, about the same as the 548 from 2006 to 2015.
  • 16% of collisions in SW20 were fatal or serious, against 20% across Great Britain.
  • 424 children under 16 were killed or injured in SW20, 10% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 24% of collisions in SW20.

Where SW20 ranks among 2,813 postcode districts

Most collisions
1,092nd
Most casualties
1,216th
Most fatal collisions
1,348th
Most serious collisions
1,430th

Collisions by day of the week

  • Monday512 (15%)
  • Tuesday556 (16%)
  • Wednesday519 (15%)
  • Thursday553 (16%)
  • Friday577 (17%)
  • Saturday430 (12%)
  • Sunday345 (9.9%)

Light conditions

  • Daylight2,534 (73%)
  • Dark, street lights lit890 (25%)
  • Dark, lighting unknown54 (1.5%)
  • Dark, no street lighting7 (0.2%)
  • Dark, street lights unlit7 (0.2%)

Type of road

  • Single carriageway2,433 (70%)
  • Dual carriageway724 (21%)
  • One way street or slip road194 (5.6%)
  • Roundabout109 (3.1%)
  • Not recorded32 (0.9%)

Speed limit at the scene

  • 20 mph211 (6%)
  • 30 mph2,692 (77%)
  • 40 mph294 (8.4%)
  • 50 mph103 (2.9%)
  • 60 mph14 (0.4%)
  • 70 mph177 (5.1%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds2,815 (81%)
  • Raining, no high winds428 (12%)
  • Fine with high winds32 (0.9%)
  • Raining with high winds18 (0.5%)
  • Fog or mist13 (0.4%)
  • Snowing, no high winds8 (0.2%)
  • Snowing with high winds1 (under 0.1%)
  • Other55 (1.6%)
  • Not recorded122 (3.5%)

Who was hurt

  • Car occupant2,172 (51%)
  • Motorcyclist624 (15%)
  • Pedestrian583 (14%)
  • Cyclist561 (13%)
  • Bus or coach occupant140 (3.3%)
  • Van occupant132 (3.1%)
  • Taxi or private hire car occupant28 (0.7%)
  • Goods vehicle occupant (over 3.5 tonnes)25 (0.6%)
  • Other vehicle occupant14 (0.3%)
  • Minibus occupant8 (0.2%)
  • Other3 (0.1%)
  • Not recorded2 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

SW20 road accidents by year

Collisions and casualties in SW20, 1982 to 2025

Collisions in SW20 peaked at 140 in 1982; 2025 had 62.

  • Collisions
  • Collisions in 2025: 62
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20256271
20244852
20234450
20224449
20216067
20206170
20195873
20185373
20175067
20166270
20154662
20146888
20135260
20125775
20114056
20105972
20095263
20084347
20077085
20066171
20057287
20046881
20037087
2002100120
20017287
20007184
199994121
199891113
199789105
199690118
199585105
1994104129
199395117
199297122
1991125156
1990103133
1989132158
1988116144
1987131159
1986115139
1985107162
1984129152
1983106123
1982140169

Map of recent crashes in SW20

Map of the 24 most recent crashes in SW20

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SW20

The 24 most recent collisions in SW20 happened between 11 September and 29 December 2025.

Severity

Crashes by road in SW20

The A238 has the most collisions in SW20, 1,032 of 3,492 (30%), followed by the A298 (479).

Collisions in SW20 on each road, 1982 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA2381,0321,21314143
2ndA298479647777
3rdA34326191178
4thB279381451559
5thB235183211222
6thB286136159120
7thB281121138118
8thB2828690111

Council areas covering SW20

Collisions in SW20 were recorded in 2 council areas. Merton has 3,109 of 3,492 (89%).

Collisions in SW20 by council area, 1982 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stMerton3,1093,75837452
2ndKingston upon Thames381530869

Towns in SW20

Collisions in SW20 were recorded in 2 towns, led by Merton (3,004) and Kingston upon Thames (188).