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CrashStats

A308(M) accidents: crash map and statistics

Police recorded 223 collisions on the A308(M) from 1979 to 2024, with 272 casualties. Of those crashes, 2 were fatal and 14 serious, and 2 people were killed.

No collisions were recorded on the A308(M) in 2025, after 2 in 2024.

Live A308(M) closures, incidents and roadworks are checked every 5 minutes.

Collisions since 1979
223
3,095th highest of 4,923 roads
Casualties
272
1.22 per collision
Fatal collisions
2
2 people killed
Serious collisions
14
16 seriously injured
Collisions in 2025
0
2 in 2024
Casualties in 2025
0
4 in 2024

Crash severity on the A308(M)

On the A308(M), 0.9% of collisions were fatal and 6.3% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2024

  • Fatal20.9%
  • Serious146.3%
  • Slight20793%

Where the A308(M) ranks among 4,923 roads

Most collisions
3,095th
Most casualties
3,250th
Most fatal collisions
3,485th
Most serious collisions
4,361st

A308(M) accidents by year

Collisions on the A308(M) peaked at 15 in 1992; none were recorded in 2025.

Collisions and casualties on the A308(M), 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202500
202424
202322
202235
202111
202000
201922
201833
201724
201622
201511
201437
201346
201222
201156
201055
200922
200844
200736
200611
200500
200433
200358
20021013
200188
200044
19991010
199868
19971119
199667
199578
199499
199356
19921520
19911314
199069
198967
198877
198733
198655
1985910
198478
198377
198244
198134
198044
197934

When crashes happen on the A308(M)

Friday has the most collisions on the A308(M) (43), and 3pm to 6pm is the busiest time of day (47).

Collisions by day of the week

  • Monday29 (13%)
  • Tuesday33 (15%)
  • Wednesday30 (13%)
  • Thursday39 (17%)
  • Friday43 (19%)
  • Saturday27 (12%)
  • Sunday22 (9.9%)

Collisions by time of day

  • Midnight to 3am10 (4.5%)
  • 3am to 6am8 (3.6%)
  • 6am to 9am37 (17%)
  • 9am to noon34 (15%)
  • Noon to 3pm28 (13%)
  • 3pm to 6pm47 (21%)
  • 6pm to 9pm36 (16%)
  • 9pm to midnight23 (10%)

Collisions by month

  • January16 (7.2%)
  • February15 (6.7%)
  • March13 (5.8%)
  • April12 (5.4%)
  • May19 (8.5%)
  • June35 (16%)
  • July25 (11%)
  • August22 (9.9%)
  • September19 (8.5%)
  • October19 (8.5%)
  • November15 (6.7%)
  • December13 (5.8%)

Light conditions at the time

  • Daylight154 (69%)
  • Dark, street lights lit66 (30%)
  • Dark, no street lighting2 (0.9%)
  • Dark, lighting unknown1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A308(M) crashes

On the A308(M), 84% of collisions happened where the speed limit was 70 mph and 70% on a dry road surface.

Speed limit at the scene

  • 30 mph9 (4%)
  • 40 mph18 (8.1%)
  • 50 mph4 (1.8%)
  • 60 mph5 (2.2%)
  • 70 mph187 (84%)

Weather at the time

  • Fine, no high winds175 (78%)
  • Raining, no high winds24 (11%)
  • Fine with high winds7 (3.1%)
  • Fog or mist5 (2.2%)
  • Other8 (3.6%)
  • Not recorded4 (1.8%)

Road surface

  • Dry156 (70%)
  • Wet or damp62 (28%)
  • Frost or ice3 (1.3%)
  • Not recorded2 (0.9%)

Type of road

  • Roundabout160 (72%)
  • Dual carriageway56 (25%)
  • Single carriageway4 (1.8%)
  • One way street or slip road3 (1.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A308(M) crashes

Car occupants make up 83% of the people killed or injured on the A308(M), followed by motorcyclists (11%).

Casualties by road user

  • Car occupant227 (83%)
  • Motorcyclist31 (11%)
  • Van occupant6 (2.2%)
  • Cyclist2 (0.7%)
  • Goods vehicle occupant (over 3.5 tonnes)2 (0.7%)
  • Taxi or private hire car occupant2 (0.7%)
  • Minibus occupant1 (0.4%)
  • Other vehicle occupant1 (0.4%)

Vehicles involved

  • Car366 (84%)
  • Motorcycle29 (6.7%)
  • Goods vehicle over 3.5 tonnes18 (4.1%)
  • Van or goods vehicle up to 3.5 tonnes15 (3.4%)
  • Minibus3 (0.7%)
  • Pedal cycle2 (0.5%)
  • Taxi or private hire car2 (0.5%)
  • Other vehicle1 (0.2%)

Casualties by age

  • 0 to 51 (0.4%)
  • 6 to 103 (1.1%)
  • 11 to 157 (2.6%)
  • 16 to 2031 (11%)
  • 21 to 2555 (20%)
  • 26 to 3571 (26%)
  • 36 to 4542 (15%)
  • 46 to 5534 (13%)
  • 56 to 6512 (4.4%)
  • 66 to 759 (3.3%)
  • Over 753 (1.1%)
  • Not recorded4 (1.5%)

Drivers, passengers and pedestrians

  • Driver or rider197 (72%)
  • Passenger75 (28%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A308(M)

Map of the 25 most recent crashes on the A308(M)

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

  • 25 crashes
  • Slight

A308(M) crashes by council area

All 223 collisions on the A308(M) were in Windsor and Maidenhead.

Collisions on the A308(M) in each area, 1979 to 2024
RankAreaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead223272214

Recent crashes on the A308(M)

These are the 25 most recent collisions on the A308(M), from 13 June 2013 to 31 July 2024.