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CrashStats

A423(M) accidents: crash map and statistics

Police recorded 59 collisions on the A423(M) from 1979 to 1991, with 76 casualties. Of those crashes, 2 were fatal and 6 serious, and 2 people were killed.

The last recorded collision on the A423(M) was on 16 November 1991.

Collisions since 1979
59
4,493rd highest of 4,923 roads
Casualties
76
1.29 per collision
Fatal collisions
2
2 people killed
Serious collisions
6
9 seriously injured
Last recorded collision
16 Nov 1991
Busiest year
1989
15 collisions

Crash severity on the A423(M)

On the A423(M), 3.4% of collisions were fatal and 10% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 1991

  • Fatal23.4%
  • Serious610%
  • Slight5186%

Where the A423(M) ranks among 4,923 roads

Most collisions
4,493rd
Most casualties
4,516th
Most fatal collisions
3,485th
Most serious collisions
4,823rd

A423(M) accidents by year

Collisions on the A423(M) peaked at 15 in 1989, and none have been recorded since 1991.

Collisions and casualties on the A423(M), 1979 to 1991

  • Collisions
  • Collisions in 1991: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
199145
199067
19891519
198844
198747
19861011
1985713
198433
198322
198223
198100
198011
197911

When crashes happen on the A423(M)

Monday has the most collisions on the A423(M) (11), and 6am to 9am is the busiest time of day (11).

Collisions by day of the week

  • Monday11 (19%)
  • Tuesday6 (10%)
  • Wednesday9 (15%)
  • Thursday7 (12%)
  • Friday10 (17%)
  • Saturday7 (12%)
  • Sunday9 (15%)

Collisions by time of day

  • Midnight to 3am7 (12%)
  • 3am to 6am0 (0%)
  • 6am to 9am11 (19%)
  • 9am to noon7 (12%)
  • Noon to 3pm11 (19%)
  • 3pm to 6pm11 (19%)
  • 6pm to 9pm5 (8.5%)
  • 9pm to midnight7 (12%)

Collisions by month

  • January4 (6.8%)
  • February5 (8.5%)
  • March3 (5.1%)
  • April5 (8.5%)
  • May6 (10%)
  • June3 (5.1%)
  • July3 (5.1%)
  • August2 (3.4%)
  • September8 (14%)
  • October7 (12%)
  • November5 (8.5%)
  • December8 (14%)

Light conditions at the time

  • Daylight36 (61%)
  • Dark, no street lighting12 (20%)
  • Dark, street lights lit10 (17%)
  • Dark, lighting unknown1 (1.7%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A423(M) crashes

On the A423(M), 93% of collisions happened where the speed limit was 70 mph and 56% on a dry road surface.

Speed limit at the scene

  • 30 mph1 (1.7%)
  • 40 mph1 (1.7%)
  • 60 mph2 (3.4%)
  • 70 mph55 (93%)

Weather at the time

  • Fine, no high winds47 (80%)
  • Raining, no high winds7 (12%)
  • Fog or mist2 (3.4%)
  • Raining with high winds1 (1.7%)
  • Snowing with high winds1 (1.7%)
  • Other1 (1.7%)

Road surface

  • Dry33 (56%)
  • Wet or damp23 (39%)
  • Snow2 (3.4%)
  • Frost or ice1 (1.7%)

Type of road

  • Dual carriageway50 (85%)
  • Roundabout6 (10%)
  • One way street or slip road3 (5.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A423(M) crashes

Car occupants make up 82% of the people killed or injured on the A423(M), followed by motorcyclists (12%).

Casualties by road user

  • Car occupant62 (82%)
  • Motorcyclist9 (12%)
  • Van occupant2 (2.6%)
  • Bus or coach occupant1 (1.3%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (1.3%)
  • Pedestrian1 (1.3%)

Vehicles involved

  • Car78 (82%)
  • Motorcycle9 (9.5%)
  • Goods vehicle over 3.5 tonnes4 (4.2%)
  • Van or goods vehicle up to 3.5 tonnes3 (3.2%)
  • Bus or coach1 (1.1%)

Casualties by age

  • 6 to 102 (2.6%)
  • 11 to 154 (5.3%)
  • 16 to 209 (12%)
  • 21 to 2513 (17%)
  • 26 to 3519 (25%)
  • 36 to 4516 (21%)
  • 46 to 557 (9.2%)
  • 56 to 651 (1.3%)
  • 66 to 752 (2.6%)
  • Over 751 (1.3%)
  • Not recorded2 (2.6%)

Drivers, passengers and pedestrians

  • Driver or rider52 (68%)
  • Passenger23 (30%)
  • Pedestrian1 (1.3%)

Source: Department for Transport, STATS19 road safety data

Map of the latest recorded crashes on the A423(M)

Map of the 25 latest recorded crashes on the A423(M)

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

  • 25 crashes
  • Fatal
  • Slight

A423(M) crashes by council area

All 59 collisions on the A423(M) were in Windsor and Maidenhead.

Collisions on the A423(M) in each area, 1979 to 1991
RankAreaCollisionsCasualtiesFatalSerious
1stWindsor and Maidenhead597626

A423(M) crashes by town

Of the 59 collisions on the A423(M), 26 were in the built-up area of Maidenhead.

Latest recorded crashes on the A423(M)

These are the 25 latest recorded collisions on the A423(M), from 20 January 1989 to 16 November 1991.

Severity