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CrashStats

A378 accidents: crash map and statistics

Police recorded 462 collisions on the A378 from 1979 to 2025, with 666 casualties. Of those crashes, 20 were fatal and 100 serious, and 22 people were killed.

In 2025 there were 4 collisions on the A378, down 33% from 6 in 2024, with 4 casualties.

Collisions since 1979
462
2,089th highest of 4,923 roads
Casualties
666
1.44 per collision
Fatal collisions
20
22 people killed
Serious collisions
100
130 seriously injured
Collisions in 2025
4
Down 33% on 2024
Casualties in 2025
4
Down 50% on 2024

Crash severity on the A378

On the A378, 4.3% of collisions were fatal and 22% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal204.3%
  • Serious10022%
  • Slight34274%

Where the A378 ranks among 4,923 roads

Most collisions
2,089th
Most casualties
1,991st
Most fatal collisions
983rd
Most serious collisions
1,914th

A378 accidents by year

Collisions on the A378 peaked at 22 in 1981 and were down to 4 in 2025.

Collisions and casualties on the A378, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202544
202468
202346
202211
202144
202022
2019912
2018810
20171014
201659
201545
2014921
2013912
2012710
2011512
2010811
20091213
20081417
200778
20061118
20051119
20041016
20031416
20021634
2001812
20001518
19991213
1998812
1997811
1996711
19952025
19941114
199347
19921216
1991811
19901620
19891221
19881017
1987817
19861012
198599
19841013
19831113
19821721
19812237
19801729
19791725

When crashes happen on the A378

Friday has the most collisions on the A378 (96), and 3pm to 6pm is the busiest time of day (106).

Collisions by day of the week

  • Monday66 (14%)
  • Tuesday61 (13%)
  • Wednesday64 (14%)
  • Thursday72 (16%)
  • Friday96 (21%)
  • Saturday64 (14%)
  • Sunday39 (8.4%)

Collisions by time of day

  • Midnight to 3am22 (4.8%)
  • 3am to 6am6 (1.3%)
  • 6am to 9am76 (16%)
  • 9am to noon64 (14%)
  • Noon to 3pm75 (16%)
  • 3pm to 6pm106 (23%)
  • 6pm to 9pm62 (13%)
  • 9pm to midnight51 (11%)

Collisions by month

  • January39 (8.4%)
  • February34 (7.4%)
  • March41 (8.9%)
  • April31 (6.7%)
  • May30 (6.5%)
  • June50 (11%)
  • July33 (7.1%)
  • August43 (9.3%)
  • September39 (8.4%)
  • October37 (8%)
  • November42 (9.1%)
  • December43 (9.3%)

Light conditions at the time

  • Daylight326 (71%)
  • Dark, no street lighting86 (19%)
  • Dark, street lights lit40 (8.7%)
  • Dark, lighting unknown7 (1.5%)
  • Dark, street lights unlit1 (0.2%)
  • Not recorded2 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A378 crashes

On the A378, 43% of collisions happened where the speed limit was 60 mph and 64% on a dry road surface.

Speed limit at the scene

  • 20 mph28 (6.1%)
  • 30 mph146 (32%)
  • 40 mph46 (10%)
  • 50 mph27 (5.8%)
  • 60 mph199 (43%)
  • 70 mph16 (3.5%)

Weather at the time

  • Fine, no high winds353 (76%)
  • Raining, no high winds51 (11%)
  • Fog or mist7 (1.5%)
  • Fine with high winds6 (1.3%)
  • Other35 (7.6%)
  • Not recorded10 (2.2%)

Road surface

  • Dry295 (64%)
  • Wet or damp150 (32%)
  • Frost or ice12 (2.6%)
  • Flood over 3cm deep1 (0.2%)
  • Mud1 (0.2%)
  • Not recorded3 (0.6%)

Type of road

  • Single carriageway451 (98%)
  • Dual carriageway5 (1.1%)
  • One way street or slip road1 (0.2%)
  • Not recorded5 (1.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A378 crashes

Car occupants make up 72% of the people killed or injured on the A378, followed by motorcyclists (11%).

Casualties by road user

  • Car occupant479 (72%)
  • Motorcyclist70 (11%)
  • Pedestrian60 (9%)
  • Cyclist26 (3.9%)
  • Van occupant22 (3.3%)
  • Bus or coach occupant3 (0.5%)
  • Goods vehicle occupant (over 3.5 tonnes)3 (0.5%)
  • Other3 (0.5%)

Vehicles involved

  • Car630 (75%)
  • Motorcycle77 (9.2%)
  • Van or goods vehicle up to 3.5 tonnes41 (4.9%)
  • Goods vehicle over 3.5 tonnes36 (4.3%)
  • Pedal cycle27 (3.2%)
  • Other vehicle12 (1.4%)
  • Agricultural vehicle6 (0.7%)
  • Other9 (1.1%)

Casualties by age

  • 0 to 511 (1.7%)
  • 6 to 1018 (2.7%)
  • 11 to 1526 (3.9%)
  • 16 to 20143 (21%)
  • 21 to 2582 (12%)
  • 26 to 35112 (17%)
  • 36 to 4580 (12%)
  • 46 to 5559 (8.9%)
  • 56 to 6545 (6.8%)
  • 66 to 7544 (6.6%)
  • Over 7538 (5.7%)
  • Not recorded8 (1.2%)

Drivers, passengers and pedestrians

  • Driver or rider434 (65%)
  • Passenger172 (26%)
  • Pedestrian60 (9%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A378

Map of the 25 most recent crashes on the A378

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A378 crashes by council area

Collisions on the A378 were recorded in 2 council areas. Somerset has the most, with 445, followed by Spelthorne (12).

Collisions on the A378 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSomerset4456422094
2ndSpelthorne121805

A378 crashes by town

Collisions on the A378 were recorded in 2 towns and built-up areas, led by Langport (98) and Ashford, Spelthorne (6).

Recent crashes on the A378

These are the 25 most recent collisions on the A378, from 13 August 2019 to 4 September 2025.

Severity