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CrashStats

SN12 road accidents: crash map and statistics

Police recorded 3,201 road traffic collisions in the SN12 postcode district, Wiltshire, from 1979 to 2025, and 4,358 people were killed or injured in them. Of those collisions, 71 were fatal and 621 were serious.

In 2025 police recorded 58 collisions, up 29% on 2024 (45).

Collisions since 1979
3,201
1,220th highest of 2,813 postcode districts
Casualties
4,358
1.36 per collision
Fatal collisions
71
77 people killed
Serious collisions
621
735 seriously injured
Collisions in 2025
58
Up 29% on 2024
Casualties in 2025
82
Up 44% on 2024

Road collision statistics for SN12

Collisions by severity, 1979 to 2025

  • Fatal712.2%
  • Serious62119%
  • Slight2,50978%

What the data shows

  • SN12 had 466 collisions from 2016 to 2025, 9% fewer than the 511 from 2006 to 2015.
  • 22% of collisions in SN12 were fatal or serious, against 20% across Great Britain.
  • 505 children under 16 were killed or injured in SN12, 12% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 37% of collisions in SN12.

Where SN12 ranks among 2,813 postcode districts

Most collisions
1,220th
Most casualties
1,203rd
Most fatal collisions
656th
Most serious collisions
1,148th

Collisions by day of the week

  • Monday454 (14%)
  • Tuesday456 (14%)
  • Wednesday486 (15%)
  • Thursday457 (14%)
  • Friday556 (17%)
  • Saturday449 (14%)
  • Sunday343 (11%)

Light conditions

  • Daylight2,312 (72%)
  • Dark, street lights lit504 (16%)
  • Dark, no street lighting346 (11%)
  • Dark, street lights unlit25 (0.8%)
  • Dark, lighting unknown14 (0.4%)

Type of road

  • Single carriageway2,778 (87%)
  • Roundabout288 (9%)
  • Dual carriageway91 (2.8%)
  • One way street or slip road43 (1.3%)
  • Not recorded1 (under 0.1%)

Speed limit at the scene

  • 20 mph11 (0.3%)
  • 30 mph1,530 (48%)
  • 40 mph331 (10%)
  • 50 mph39 (1.2%)
  • 60 mph1,230 (38%)
  • 70 mph60 (1.9%)

Weather at the time

  • Fine, no high winds2,506 (78%)
  • Raining, no high winds463 (14%)
  • Raining with high winds66 (2.1%)
  • Fine with high winds61 (1.9%)
  • Fog or mist47 (1.5%)
  • Snowing, no high winds8 (0.2%)
  • Snowing with high winds3 (0.1%)
  • Other16 (0.5%)
  • Not recorded31 (1%)

Who was hurt

  • Car occupant2,561 (59%)
  • Motorcyclist681 (16%)
  • Cyclist423 (9.7%)
  • Pedestrian398 (9.1%)
  • Van occupant167 (3.8%)
  • Goods vehicle occupant (over 3.5 tonnes)63 (1.4%)
  • Minibus occupant21 (0.5%)
  • Bus or coach occupant19 (0.4%)
  • Taxi or private hire car occupant12 (0.3%)
  • Other vehicle occupant10 (0.2%)
  • Other3 (0.1%)

Source: Department for Transport, STATS19 road safety data

SN12 road accidents by year

Collisions and casualties in SN12, 1979 to 2025

Collisions in SN12 peaked at 134 in 1984; 2025 had 58.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20255882
20244557
20235881
20224753
20213841
20203038
20194362
20184763
20174147
20165987
20156485
20146173
20135063
20124660
20114362
20104358
20095278
20083960
20074963
20066486
20055078
20046283
20036696
20026591
200180107
20005874
199971101
19987297
199790130
199678102
199588133
199482100
199383113
19925877
19917398
199092134
198986111
198877101
198787101
1986101136
198597133
1984134183
198397134
198292148
1981102135
198084134
197999129

Map of recent crashes in SN12

Map of the 24 most recent crashes in SN12

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 SN12

The 24 most recent collisions in SN12 happened between 10 August and 26 December 2025.

Severity

Crashes by road in SN12

The A365 has the most collisions in SN12, 663 of 3,201 (21%), followed by the A350 (659).

Collisions in SN12 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA36566395614145
2ndA35065990415126
3rdA31023925291183
4thA3612733881055
5thB3107135211530
6thB335375109120

Council area for SN12

SN12 is in Wiltshire, where police recorded 68,701 collisions from 1979 to 2025. SN12 accounts for 4.7% of them.

Towns in SN12

Collisions in SN12 were recorded in 2 towns, led by Melksham (1,283) and Bowerhill (217).