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CrashStats

A343 accidents: crash map and statistics

Police recorded 2,039 collisions on the A343 from 1979 to 2025, with 2,839 casualties. Of those crashes, 44 were fatal and 481 serious, and 48 people were killed.

In 2025 there were 24 collisions on the A343, up 26% from 19 in 2024, with 35 casualties.

Collisions since 1979
2,039
572nd highest of 4,923 roads
Casualties
2,839
1.39 per collision
Fatal collisions
44
48 people killed
Serious collisions
481
579 seriously injured
Collisions in 2025
24
Up 26% on 2024
Casualties in 2025
35
Up 40% on 2024

Crash severity on the A343

On the A343, 2.2% of collisions were fatal and 24% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal442.2%
  • Serious48124%
  • Slight1,51474%

Where the A343 ranks among 4,923 roads

Most collisions
572nd
Most casualties
556th
Most fatal collisions
468th
Most serious collisions
446th

A343 accidents by year

Collisions on the A343 peaked at 77 in 1988 and were down to 24 in 2025.

Collisions and casualties on the A343, 1979 to 2025

  • Collisions
  • Collisions in 2025: 24
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252435
20241925
20232229
20222023
20211324
20202331
20192233
20182835
20172636
20162631
20153341
20144047
20133747
20122030
20114458
20102531
20094153
20083145
20073148
20062835
20052734
20043344
20034059
20025778
20014370
20004774
19995372
19985887
19976387
19967399
199559101
19945781
19935266
19925472
19916089
19905474
19895676
198877109
19875978
19866384
19855888
198477105
19833761
19825366
198161101
19806169
19795478

When crashes happen on the A343

Friday has the most collisions on the A343 (326), and 3pm to 6pm is the busiest time of day (519).

Collisions by day of the week

  • Monday286 (14%)
  • Tuesday306 (15%)
  • Wednesday296 (15%)
  • Thursday309 (15%)
  • Friday326 (16%)
  • Saturday291 (14%)
  • Sunday225 (11%)

Collisions by time of day

  • Midnight to 3am47 (2.3%)
  • 3am to 6am43 (2.1%)
  • 6am to 9am336 (16%)
  • 9am to noon278 (14%)
  • Noon to 3pm342 (17%)
  • 3pm to 6pm519 (25%)
  • 6pm to 9pm306 (15%)
  • 9pm to midnight168 (8.2%)

Collisions by month

  • January173 (8.5%)
  • February173 (8.5%)
  • March146 (7.2%)
  • April148 (7.3%)
  • May161 (7.9%)
  • June169 (8.3%)
  • July175 (8.6%)
  • August162 (7.9%)
  • September184 (9%)
  • October186 (9.1%)
  • November196 (9.6%)
  • December166 (8.1%)

Light conditions at the time

  • Daylight1,452 (71%)
  • Dark, no street lighting310 (15%)
  • Dark, street lights lit249 (12%)
  • Dark, lighting unknown21 (1%)
  • Dark, street lights unlit7 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A343 crashes

On the A343, 49% of collisions happened where the speed limit was 60 mph and 63% on a dry road surface.

Speed limit at the scene

  • 30 mph478 (23%)
  • 40 mph241 (12%)
  • 50 mph227 (11%)
  • 60 mph996 (49%)
  • 70 mph96 (4.7%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds1,613 (79%)
  • Raining, no high winds257 (13%)
  • Raining with high winds39 (1.9%)
  • Fine with high winds26 (1.3%)
  • Other96 (4.7%)
  • Not recorded8 (0.4%)

Road surface

  • Dry1,277 (63%)
  • Wet or damp681 (33%)
  • Frost or ice55 (2.7%)
  • Snow15 (0.7%)
  • Other9 (0.4%)
  • Not recorded2 (0.1%)

Type of road

  • Single carriageway1,661 (81%)
  • Roundabout283 (14%)
  • Dual carriageway79 (3.9%)
  • One way street or slip road12 (0.6%)
  • Not recorded4 (0.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A343 crashes

Car occupants make up 66% of the people killed or injured on the A343, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant1,860 (66%)
  • Motorcyclist390 (14%)
  • Cyclist201 (7.1%)
  • Pedestrian172 (6.1%)
  • Van occupant103 (3.6%)
  • Goods vehicle occupant (over 3.5 tonnes)41 (1.4%)
  • Minibus occupant27 (1%)
  • Other45 (1.6%)

Vehicles involved

  • Car2,794 (73%)
  • Motorcycle393 (10%)
  • Van or goods vehicle up to 3.5 tonnes216 (5.6%)
  • Pedal cycle208 (5.4%)
  • Goods vehicle over 3.5 tonnes135 (3.5%)
  • Other vehicle33 (0.9%)
  • Other56 (1.5%)
  • Not recorded3 (0.1%)

Casualties by age

  • 0 to 539 (1.4%)
  • 6 to 1047 (1.7%)
  • 11 to 15151 (5.3%)
  • 16 to 20558 (20%)
  • 21 to 25393 (14%)
  • 26 to 35541 (19%)
  • 36 to 45402 (14%)
  • 46 to 55314 (11%)
  • 56 to 65181 (6.4%)
  • 66 to 75118 (4.2%)
  • Over 7579 (2.8%)
  • Not recorded16 (0.6%)

Drivers, passengers and pedestrians

  • Driver or rider1,941 (68%)
  • Passenger726 (26%)
  • Pedestrian172 (6.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A343

Map of the 25 most recent crashes on the A343

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

  • 25 crashes
  • Serious
  • Slight

A343 crashes by council area

Collisions on the A343 were recorded in 4 council areas. Test Valley has the most, with 1,372, followed by West Berkshire (344) and Basingstoke and Deane (299).

Collisions on the A343 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stTest Valley1,3721,88931325
2ndWest Berkshire344430375
3rdBasingstoke and Deane299485977
4thWiltshire193012

A343 crashes by town

Collisions on the A343 were recorded in 2 towns and built-up areas, led by Andover (427) and Newbury (311).

Recent crashes on the A343

These are the 25 most recent collisions on the A343, from 14 December 2024 to 7 December 2025.

Severity