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CrashStats

B3400 accidents: crash map and statistics

Police recorded 1,468 collisions on the B3400 from 1979 to 2025, with 2,056 casualties. Of those crashes, 37 were fatal and 395 serious, and 42 people were killed.

In 2025 there were 23 collisions on the B3400, up 130% from 10 in 2024, with 34 casualties.

Collisions since 1979
1,468
754th highest of 4,923 roads
Casualties
2,056
1.40 per collision
Fatal collisions
37
42 people killed
Serious collisions
395
506 seriously injured
Collisions in 2025
23
Up 130% on 2024
Casualties in 2025
34
Up 100% on 2024

Crash severity on the B3400

On the B3400, 2.5% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal372.5%
  • Serious39527%
  • Slight1,03671%

Where the B3400 ranks among 4,923 roads

Most collisions
754th
Most casualties
727th
Most fatal collisions
563rd
Most serious collisions
545th

B3400 accidents by year

Collisions on the B3400 peaked at 64 in 1990 and were down to 23 in 2025.

Collisions and casualties on the B3400, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252334
20241017
20231926
20221420
202166
202099
20192022
20181945
20171523
20161316
20151822
20141920
20132029
20121315
20111520
20101214
20092023
20082024
20071518
20062330
20054455
20042536
20033050
20023259
20013554
20003750
19993243
19984561
19974763
19964677
19955367
19944859
19933948
19924661
19913954
199064100
19895676
19885485
19874058
19864975
19854470
19844656
19834360
19824968
19813850
19803140
19793348

When crashes happen on the B3400

Friday has the most collisions on the B3400 (233), and 3pm to 6pm is the busiest time of day (346).

Collisions by day of the week

  • Monday213 (15%)
  • Tuesday216 (15%)
  • Wednesday224 (15%)
  • Thursday208 (14%)
  • Friday233 (16%)
  • Saturday212 (14%)
  • Sunday162 (11%)

Collisions by time of day

  • Midnight to 3am77 (5.2%)
  • 3am to 6am29 (2%)
  • 6am to 9am216 (15%)
  • 9am to noon198 (13%)
  • Noon to 3pm217 (15%)
  • 3pm to 6pm346 (24%)
  • 6pm to 9pm222 (15%)
  • 9pm to midnight163 (11%)

Collisions by month

  • January134 (9.1%)
  • February100 (6.8%)
  • March111 (7.6%)
  • April111 (7.6%)
  • May108 (7.4%)
  • June123 (8.4%)
  • July123 (8.4%)
  • August122 (8.3%)
  • September128 (8.7%)
  • October143 (9.7%)
  • November145 (9.9%)
  • December120 (8.2%)

Light conditions at the time

  • Daylight977 (67%)
  • Dark, street lights lit236 (16%)
  • Dark, no street lighting224 (15%)
  • Dark, lighting unknown27 (1.8%)
  • Dark, street lights unlit4 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B3400 crashes

On the B3400, 43% of collisions happened where the speed limit was 60 mph and 62% on a dry road surface.

Speed limit at the scene

  • 20 mph11 (0.7%)
  • 30 mph487 (33%)
  • 40 mph165 (11%)
  • 50 mph81 (5.5%)
  • 60 mph629 (43%)
  • 70 mph95 (6.5%)

Weather at the time

  • Fine, no high winds1,140 (78%)
  • Raining, no high winds196 (13%)
  • Fine with high winds23 (1.6%)
  • Raining with high winds21 (1.4%)
  • Other80 (5.4%)
  • Not recorded8 (0.5%)

Road surface

  • Dry912 (62%)
  • Wet or damp512 (35%)
  • Frost or ice36 (2.5%)
  • Flood over 3cm deep3 (0.2%)
  • Snow3 (0.2%)
  • Oil or diesel2 (0.1%)

Type of road

  • Single carriageway1,226 (84%)
  • Roundabout139 (9.5%)
  • Dual carriageway98 (6.7%)
  • One way street or slip road2 (0.1%)
  • Not recorded3 (0.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B3400 crashes

Car occupants make up 66% of the people killed or injured on the B3400, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant1,349 (66%)
  • Motorcyclist285 (14%)
  • Pedestrian177 (8.6%)
  • Cyclist109 (5.3%)
  • Van occupant46 (2.2%)
  • Bus or coach occupant41 (2%)
  • Taxi or private hire car occupant17 (0.8%)
  • Other32 (1.6%)

Vehicles involved

  • Car1,955 (74%)
  • Motorcycle284 (11%)
  • Van or goods vehicle up to 3.5 tonnes125 (4.7%)
  • Pedal cycle110 (4.2%)
  • Goods vehicle over 3.5 tonnes67 (2.5%)
  • Bus or coach55 (2.1%)
  • Other vehicle21 (0.8%)
  • Other25 (0.9%)

Casualties by age

  • 0 to 540 (1.9%)
  • 6 to 1053 (2.6%)
  • 11 to 1567 (3.3%)
  • 16 to 20482 (23%)
  • 21 to 25325 (16%)
  • 26 to 35357 (17%)
  • 36 to 45271 (13%)
  • 46 to 55196 (9.5%)
  • 56 to 65143 (7%)
  • 66 to 7573 (3.6%)
  • Over 7547 (2.3%)
  • Not recorded2 (0.1%)

Drivers, passengers and pedestrians

  • Driver or rider1,358 (66%)
  • Passenger521 (25%)
  • Pedestrian177 (8.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B3400

Map of the 25 most recent crashes on the B3400

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

  • 25 crashes
  • Serious
  • Slight

B3400 crashes by council area

Collisions on the B3400 were recorded in 3 council areas. Basingstoke and Deane has the most, with 1,286, followed by Test Valley (172) and Winchester (6).

Collisions on the B3400 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBasingstoke and Deane1,2861,78527356
2ndTest Valley1722531035
3rdWinchester6902

B3400 crashes by town

Collisions on the B3400 were recorded in 7 towns and built-up areas, led by Basingstoke (457) and Overton, Basingstoke and Deane (87).

Recent crashes on the B3400

These are the 25 most recent collisions on the B3400, from 17 December 2024 to 18 December 2025.

Severity