Skip to main content
CrashStats

SN4 road accidents: crash map and statistics

Police recorded 5,289 road traffic collisions in the SN4 postcode district, Swindon, from 1979 to 2025, and 7,866 people were killed or injured in them. Of those collisions, 116 were fatal and 1,041 were serious.

In 2025 police recorded 70 collisions, down 7% on 2024 (75).

Collisions since 1979
5,289
492nd highest of 2,813 postcode districts
Casualties
7,866
1.49 per collision
Fatal collisions
116
134 people killed
Serious collisions
1,041
1,283 seriously injured
Collisions in 2025
70
Down 7% on 2024
Casualties in 2025
98
Down 14% on 2024

Road collision statistics for SN4

Collisions by severity, 1979 to 2025

  • Fatal1162.2%
  • Serious1,04120%
  • Slight4,13278%

What the data shows

  • SN4 had 680 collisions from 2016 to 2025, 21% fewer than the 857 from 2006 to 2015.
  • 22% of collisions in SN4 were fatal or serious, against 20% across Great Britain.
  • 697 children under 16 were killed or injured in SN4, 8.9% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 37% of collisions in SN4.

Where SN4 ranks among 2,813 postcode districts

Most collisions
492nd
Most casualties
330th
Most fatal collisions
193rd
Most serious collisions
345th

Collisions by day of the week

  • Monday703 (13%)
  • Tuesday754 (14%)
  • Wednesday780 (15%)
  • Thursday726 (14%)
  • Friday928 (18%)
  • Saturday766 (14%)
  • Sunday632 (12%)

Light conditions

  • Daylight3,762 (71%)
  • Dark, no street lighting1,093 (21%)
  • Dark, street lights lit391 (7.4%)
  • Dark, street lights unlit26 (0.5%)
  • Dark, lighting unknown17 (0.3%)

Type of road

  • Single carriageway3,772 (71%)
  • Dual carriageway1,179 (22%)
  • Roundabout300 (5.7%)
  • One way street or slip road36 (0.7%)
  • Not recorded2 (under 0.1%)

Speed limit at the scene

  • 20 mph10 (0.2%)
  • 30 mph1,219 (23%)
  • 40 mph270 (5.1%)
  • 50 mph280 (5.3%)
  • 60 mph2,252 (43%)
  • 70 mph1,258 (24%)

Weather at the time

  • Fine, no high winds4,063 (77%)
  • Raining, no high winds673 (13%)
  • Raining with high winds149 (2.8%)
  • Fine with high winds135 (2.6%)
  • Fog or mist121 (2.3%)
  • Snowing, no high winds34 (0.6%)
  • Snowing with high winds23 (0.4%)
  • Other18 (0.3%)
  • Not recorded73 (1.4%)

Who was hurt

  • Car occupant5,566 (71%)
  • Motorcyclist832 (11%)
  • Pedestrian408 (5.2%)
  • Van occupant364 (4.6%)
  • Cyclist314 (4%)
  • Goods vehicle occupant (over 3.5 tonnes)165 (2.1%)
  • Bus or coach occupant113 (1.4%)
  • Minibus occupant34 (0.4%)
  • Other vehicle occupant31 (0.4%)
  • Taxi or private hire car occupant21 (0.3%)
  • Other18 (0.2%)

Source: Department for Transport, STATS19 road safety data

SN4 road accidents by year

Collisions and casualties in SN4, 1979 to 2025

Collisions in SN4 peaked at 172 in 2002; 2025 had 70.

  • Collisions
  • Collisions in 2025: 70
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20257098
202475114
202360102
20227298
20216085
20204253
20196494
201872111
201786114
201679105
201583131
201492122
201383125
201281117
201172100
20107097
200970103
200894141
200793129
2006119184
2005107158
2004131236
2003132201
2002172250
2001157241
2000162274
1999163252
1998135207
1997160241
1996140190
1995127185
1994124198
1993133183
1992125186
1991102154
1990152231
1989135208
1988152234
1987143191
1986147222
1985146197
1984151215
1983149257
1982130182
1981133206
1980138203
1979106141

Map of recent crashes in SN4

Map of the 24 most recent crashes in SN4

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in SN4

The 24 most recent collisions in SN4 happened between 29 October and 31 December 2025.

Severity

Crashes by road in SN4

The M4 has the most collisions in SN4, 1,090 of 5,289 (21%), followed by the A3102 (831).

Collisions in SN4 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stM41,0901,83133183
2ndA31028311,1829150
3rdA436152479917120
4thB4005353506463
5thA346204339329
6thA345155241826
7thB41921532461031
8thA419151205118
9thA420140184141
10thA361133179440
11thB4042124192438
12thB404183121318
13thB450771102
14thB46966600
15thB40065501

Council areas covering SN4

Collisions in SN4 were recorded in 2 council areas. Swindon has 2,658 of 5,289 (50%).

Collisions in SN4 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stSwindon2,6584,02362508
2ndWiltshire2,6313,84354533

Towns in SN4

Collisions in SN4 were recorded in 4 towns, led by Royal Wootton Bassett (750) and Wroughton (380).