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CrashStats

SN8 road accidents: crash map and statistics

Police recorded 4,684 road traffic collisions in the SN8 postcode district, Wiltshire, from 1979 to 2025, and 6,954 people were killed or injured in them. Of those collisions, 152 were fatal and 1,037 were serious.

In 2025 police recorded 66 collisions, up 50% on 2024 (44).

Collisions since 1979
4,684
652nd highest of 2,813 postcode districts
Casualties
6,954
1.48 per collision
Fatal collisions
152
169 people killed
Serious collisions
1,037
1,334 seriously injured
Collisions in 2025
66
Up 50% on 2024
Casualties in 2025
96
Up 55% on 2024

Road collision statistics for SN8

Collisions by severity, 1979 to 2025

  • Fatal1523.2%
  • Serious1,03722%
  • Slight3,49575%

What the data shows

  • SN8 had 585 collisions from 2016 to 2025, 21% fewer than the 745 from 2006 to 2015.
  • 25% of collisions in SN8 were fatal or serious, against 20% across Great Britain.
  • 543 children under 16 were killed or injured in SN8, 7.8% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 42% of collisions in SN8.

Where SN8 ranks among 2,813 postcode districts

Most collisions
652nd
Most casualties
488th
Most fatal collisions
63rd
Most serious collisions
351st

Collisions by day of the week

  • Monday675 (14%)
  • Tuesday627 (13%)
  • Wednesday643 (14%)
  • Thursday667 (14%)
  • Friday764 (16%)
  • Saturday679 (14%)
  • Sunday629 (13%)

Light conditions

  • Daylight3,458 (74%)
  • Dark, no street lighting976 (21%)
  • Dark, street lights lit210 (4.5%)
  • Dark, lighting unknown22 (0.5%)
  • Dark, street lights unlit18 (0.4%)

Type of road

  • Single carriageway4,156 (89%)
  • Dual carriageway427 (9.1%)
  • Roundabout74 (1.6%)
  • One way street or slip road26 (0.6%)
  • Not recorded1 (under 0.1%)

Speed limit at the scene

  • 20 mph24 (0.5%)
  • 30 mph989 (21%)
  • 40 mph108 (2.3%)
  • 50 mph167 (3.6%)
  • 60 mph2,882 (62%)
  • 70 mph514 (11%)

Weather at the time

  • Fine, no high winds3,557 (76%)
  • Raining, no high winds655 (14%)
  • Fog or mist129 (2.8%)
  • Raining with high winds110 (2.3%)
  • Fine with high winds90 (1.9%)
  • Snowing, no high winds41 (0.9%)
  • Snowing with high winds21 (0.4%)
  • Other25 (0.5%)
  • Not recorded56 (1.2%)

Who was hurt

  • Car occupant5,016 (72%)
  • Motorcyclist715 (10%)
  • Pedestrian425 (6.1%)
  • Van occupant340 (4.9%)
  • Cyclist185 (2.7%)
  • Goods vehicle occupant (over 3.5 tonnes)140 (2%)
  • Bus or coach occupant49 (0.7%)
  • Minibus occupant43 (0.6%)
  • Other vehicle occupant24 (0.3%)
  • Taxi or private hire car occupant11 (0.2%)
  • Other6 (0.1%)

Source: Department for Transport, STATS19 road safety data

SN8 road accidents by year

Collisions and casualties in SN8, 1979 to 2025

Collisions in SN8 peaked at 149 in 1981; 2025 had 66.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20256696
20244462
202371111
20226684
20215880
20203551
20195791
20185470
20175898
201676110
201581105
201477114
20136482
20127396
201182107
20106188
20095774
200868103
200778109
2006104163
200591130
2004105162
2003127190
2002116167
2001142216
2000138221
1999137215
1998120172
1997142215
1996138216
1995125185
1994136213
1993105167
1992106145
1991116163
1990128216
1989124193
1988117192
1987115185
1986109155
1985128200
1984126186
1983115154
1982108164
1981149221
1980148209
1979143208

Map of recent crashes in SN8

Map of the 24 most recent crashes in SN8

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 SN8

The 24 most recent collisions in SN8 happened between 9 September and 27 December 2025.

Severity

Crashes by road in SN8

The A4 has the most collisions in SN8, 899 of 4,684 (19%), followed by the A346 (666).

Collisions in SN8 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA48991,22339183
2ndA3466661,11323131
3rdA33851179717123
4thA34549278316120
5thM43906161268
6thA342125195434
7thB4192123193939
8thA4361106155320
9thA36178114322
10thB3052273405
11thA419183523
12thB3087111605

Council areas covering SN8

Collisions in SN8 were recorded in 3 council areas. Wiltshire has 4,605 of 4,684 (98%).

Collisions in SN8 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stWiltshire4,6056,8351491,017
2ndSwindon73109219
3rdWest Berkshire4811

Town in SN8

Of the 4,684 collisions in SN8, 624 (13%) were in Marlborough.