Skip to main content
CrashStats

SO20 road accidents: crash map and statistics

Police recorded 1,841 road traffic collisions in the SO20 postcode district, Test Valley, from 1979 to 2025, and 2,591 people were killed or injured in them. Of those collisions, 46 were fatal and 481 were serious.

In 2025 police recorded 35 collisions, up 75% on 2024 (20).

Collisions since 1979
1,841
1,820th of 2,813 postcode districts, highest first
Casualties
2,591
1.41 per collision
Fatal collisions
46
51 people killed
Serious collisions
481
592 seriously injured
Collisions in 2025
35
Up 75% on 2024
Casualties in 2025
47
Up 68% on 2024

Road collision statistics for SO20

Collisions by severity, 1979 to 2025

  • Fatal462.5%
  • Serious48126%
  • Slight1,31471%

What the data shows

  • SO20 had 245 collisions from 2016 to 2025, 6% fewer than the 260 from 2006 to 2015.
  • 29% of collisions in SO20 were fatal or serious, against 20% across Great Britain.
  • 190 children under 16 were killed or injured in SO20, 7.3% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 42% of collisions in SO20.

Where SO20 ranks among 2,813 postcode districts

Most collisions
1,820th
Most casualties
1,806th
Most fatal collisions
1,308th
Most serious collisions
1,542nd

Collisions by day of the week

  • Monday230 (12%)
  • Tuesday270 (15%)
  • Wednesday266 (14%)
  • Thursday273 (15%)
  • Friday297 (16%)
  • Saturday266 (14%)
  • Sunday239 (13%)

Light conditions

  • Daylight1,359 (74%)
  • Dark, no street lighting396 (22%)
  • Dark, street lights lit58 (3.2%)
  • Dark, lighting unknown23 (1.2%)
  • Dark, street lights unlit5 (0.3%)

Type of road

  • Single carriageway1,759 (96%)
  • Dual carriageway35 (1.9%)
  • Roundabout34 (1.8%)
  • One way street or slip road6 (0.3%)
  • Not recorded7 (0.4%)

Speed limit at the scene

  • 30 mph324 (18%)
  • 40 mph96 (5.2%)
  • 50 mph106 (5.8%)
  • 60 mph1,244 (68%)
  • 70 mph71 (3.9%)

Weather at the time

  • Fine, no high winds1,380 (75%)
  • Raining, no high winds282 (15%)
  • Raining with high winds36 (2%)
  • Fog or mist35 (1.9%)
  • Fine with high winds29 (1.6%)
  • Snowing, no high winds8 (0.4%)
  • Snowing with high winds2 (0.1%)
  • Other62 (3.4%)
  • Not recorded7 (0.4%)

Who was hurt

  • Car occupant1,898 (73%)
  • Motorcyclist300 (12%)
  • Cyclist111 (4.3%)
  • Pedestrian111 (4.3%)
  • Van occupant103 (4%)
  • Goods vehicle occupant (over 3.5 tonnes)28 (1.1%)
  • Other vehicle occupant16 (0.6%)
  • Bus or coach occupant8 (0.3%)
  • Minibus occupant7 (0.3%)
  • Taxi or private hire car occupant7 (0.3%)
  • Other2 (0.1%)

Source: Department for Transport, STATS19 road safety data

SO20 road accidents by year

Collisions and casualties in SO20, 1979 to 2025

Collisions in SO20 peaked at 83 in 1988; 2025 had 35.

  • Collisions
  • Collisions in 2025: 35
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253547
20242028
20232226
20221927
20212439
20203348
20192636
20182741
20172229
20161719
20152637
20142532
20131721
20121929
20112638
20102731
20092948
20083444
20072846
20062933
20054557
20043243
20033853
20024559
20013451
20003654
19993952
19985471
19973956
19965580
19954564
19945583
19934664
19926189
19915479
19905682
19894656
198883110
19874458
19867994
19855579
19845282
19834462
19825177
19814581
19805382
19795074

Map of recent crashes in SO20

Map of the 24 most recent crashes in SO20

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 SO20

The 24 most recent collisions in SO20 happened between 26 April and 5 December 2025.

Severity

Crashes by road in SO20

The A30 has the most collisions in SO20, 428 of 1,841 (23%), followed by the A3057 (378).

Collisions in SO20 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA3042865515124
2ndA30573785208102
3rdA343298447765
4thB3084102132226
5thB3420355838
6thB3049324314
7thA272233112
8thA353301
9thB30573300

Council areas covering SO20

Collisions in SO20 were recorded in 5 council areas. Test Valley has 1,778 of 1,841 (97%).

Collisions in SO20 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stTest Valley1,7782,51746471
2ndWinchester243004
3rdBasingstoke and Deane151801
4thSouthampton141604
5thNew Forest6601

Town in SO20

Of the 1,841 collisions in SO20, 103 (5.6%) were in Stockbridge.