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CrashStats

SN14 road accidents: crash map and statistics

Police recorded 4,980 road traffic collisions in the SN14 postcode district, Wiltshire, from 1979 to 2025, and 7,372 people were killed or injured in them. Of those collisions, 127 were fatal and 959 were serious.

In 2025 police recorded 80 collisions, up 23% on 2024 (65).

Collisions since 1979
4,980
562nd highest of 2,813 postcode districts
Casualties
7,372
1.48 per collision
Fatal collisions
127
141 people killed
Serious collisions
959
1,182 seriously injured
Collisions in 2025
80
Up 23% on 2024
Casualties in 2025
111
Up 23% on 2024

Road collision statistics for SN14

Collisions by severity, 1979 to 2025

  • Fatal1272.6%
  • Serious95919%
  • Slight3,89478%

What the data shows

  • SN14 had 691 collisions from 2016 to 2025, 19% fewer than the 850 from 2006 to 2015.
  • 22% of collisions in SN14 were fatal or serious, against 20% across Great Britain.
  • 653 children under 16 were killed or injured in SN14, 8.9% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 39% of collisions in SN14.

Where SN14 ranks among 2,813 postcode districts

Most collisions
562nd
Most casualties
418th
Most fatal collisions
135th
Most serious collisions
442nd

Collisions by day of the week

  • Monday707 (14%)
  • Tuesday677 (14%)
  • Wednesday694 (14%)
  • Thursday696 (14%)
  • Friday885 (18%)
  • Saturday672 (13%)
  • Sunday649 (13%)

Light conditions

  • Daylight3,573 (72%)
  • Dark, no street lighting999 (20%)
  • Dark, street lights lit357 (7.2%)
  • Dark, lighting unknown30 (0.6%)
  • Dark, street lights unlit21 (0.4%)

Type of road

  • Single carriageway3,348 (67%)
  • Dual carriageway1,140 (23%)
  • Roundabout432 (8.7%)
  • One way street or slip road51 (1%)
  • Not recorded9 (0.2%)

Speed limit at the scene

  • 20 mph12 (0.2%)
  • 30 mph952 (19%)
  • 40 mph387 (7.8%)
  • 50 mph194 (3.9%)
  • 60 mph2,242 (45%)
  • 70 mph1,193 (24%)

Weather at the time

  • Fine, no high winds3,733 (75%)
  • Raining, no high winds727 (15%)
  • Fine with high winds131 (2.6%)
  • Raining with high winds125 (2.5%)
  • Fog or mist114 (2.3%)
  • Snowing, no high winds21 (0.4%)
  • Snowing with high winds11 (0.2%)
  • Other55 (1.1%)
  • Not recorded63 (1.3%)

Who was hurt

  • Car occupant5,316 (72%)
  • Motorcyclist716 (9.7%)
  • Cyclist340 (4.6%)
  • Van occupant327 (4.4%)
  • Pedestrian320 (4.3%)
  • Goods vehicle occupant (over 3.5 tonnes)196 (2.7%)
  • Minibus occupant57 (0.8%)
  • Bus or coach occupant50 (0.7%)
  • Other vehicle occupant28 (0.4%)
  • Taxi or private hire car occupant11 (0.1%)
  • Other10 (0.1%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

SN14 road accidents by year

Collisions and casualties in SN14, 1979 to 2025

Collisions in SN14 peaked at 161 in 1998; 2025 had 80.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202580111
20246590
20236895
20226395
202175103
20206286
201970114
20187196
20176183
201676119
201581113
201487130
201374110
201272108
201187126
201087122
200976106
200883136
2007109145
200694139
2005115173
2004147212
2003119167
2002124190
2001147224
2000142221
1999140228
1998161232
1997119176
1996145215
1995113173
1994125185
1993120188
1992110189
1991104161
1990130207
1989133194
1988119181
1987105159
1986141208
1985126159
1984118199
1983124165
1982117175
1981114158
1980146202
1979135204

Map of recent crashes in SN14

Map of the 24 most recent crashes in SN14

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in SN14

The 24 most recent collisions in SN14 happened between 22 September and 17 December 2025.

Severity

Crashes by road in SN14

The M4 has the most collisions in SN14, 1,034 of 4,980 (21%), followed by the A420 (713).

Collisions in SN14 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stM41,0341,74640169
2ndA4207131,03320148
3rdA3505837721090
4thA464838571595
5thA429267405953
6thB4039225345958
7thA4180226027
8thB4528108132216
9thB4040263718
10thB412261501
11thA3673300
12thA383402
13thB41583300
14thB44653401
15thM53600

Council areas covering SN14

Collisions in SN14 were recorded in 5 council areas. Wiltshire has 3,972 of 4,980 (80%).

Collisions in SN14 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stWiltshire3,9725,69486753
2ndSouth Gloucestershire9481,57939193
3rdBath and North East Somerset355925
4thBristol182607
5thVale of Glamorgan3800

Town in SN14

Of the 4,980 collisions in SN14, 1,003 (20%) were in Chippenham, Wiltshire.