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CrashStats

A4421 accidents: crash map and statistics

Police recorded 276 collisions on the A4421 from 2000 to 2025, with 386 casualties. Of those crashes, 8 were fatal and 46 serious, and 9 people were killed.

In 2025 there were 9 collisions on the A4421, up 80% from 5 in 2024, with 16 casualties.

Collisions since 2000
276
2,814th highest of 4,923 roads
Casualties
386
1.40 per collision
Fatal collisions
8
9 people killed
Serious collisions
46
51 seriously injured
Collisions in 2025
9
Up 80% on 2024
Casualties in 2025
16
Up 220% on 2024

Crash severity on the A4421

On the A4421, 2.9% of collisions were fatal and 17% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 2000 to 2025

  • Fatal82.9%
  • Serious4617%
  • Slight22280%

Where the A4421 ranks among 4,923 roads

Most collisions
2,814th
Most casualties
2,781st
Most fatal collisions
1,937th
Most serious collisions
3,090th

A4421 accidents by year

Collisions on the A4421 peaked at 22 in 2000 and were down to 9 in 2025.

Collisions and casualties on the A4421, 2000 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025916
202455
202335
202257
202138
202024
201989
201879
20171117
2016710
20151723
2014915
20131520
20121319
20111215
2010811
20091518
20081318
20071117
20061517
20051522
20041011
20031114
20021425
20011619
20002232

When crashes happen on the A4421

Wednesday has the most collisions on the A4421 (48), and 3pm to 6pm is the busiest time of day (64).

Collisions by day of the week

  • Monday39 (14%)
  • Tuesday38 (14%)
  • Wednesday48 (17%)
  • Thursday38 (14%)
  • Friday40 (14%)
  • Saturday40 (14%)
  • Sunday33 (12%)

Collisions by time of day

  • Midnight to 3am8 (2.9%)
  • 3am to 6am10 (3.6%)
  • 6am to 9am46 (17%)
  • 9am to noon43 (16%)
  • Noon to 3pm57 (21%)
  • 3pm to 6pm64 (23%)
  • 6pm to 9pm42 (15%)
  • 9pm to midnight6 (2.2%)

Collisions by month

  • January25 (9.1%)
  • February18 (6.5%)
  • March16 (5.8%)
  • April22 (8%)
  • May21 (7.6%)
  • June24 (8.7%)
  • July22 (8%)
  • August25 (9.1%)
  • September17 (6.2%)
  • October34 (12%)
  • November28 (10%)
  • December24 (8.7%)

Light conditions at the time

  • Daylight196 (71%)
  • Dark, no street lighting50 (18%)
  • Dark, street lights lit28 (10%)
  • Dark, lighting unknown2 (0.7%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4421 crashes

On the A4421, 70% of collisions happened where the speed limit was 50 mph and 60% on a dry road surface.

Speed limit at the scene

  • 30 mph4 (1.4%)
  • 40 mph23 (8.3%)
  • 50 mph192 (70%)
  • 60 mph57 (21%)

Weather at the time

  • Fine, no high winds219 (79%)
  • Raining, no high winds50 (18%)
  • Fine with high winds1 (0.4%)
  • Fog or mist1 (0.4%)
  • Other5 (1.8%)

Road surface

  • Dry166 (60%)
  • Wet or damp103 (37%)
  • Flood over 3cm deep3 (1.1%)
  • Frost or ice3 (1.1%)
  • Snow1 (0.4%)

Type of road

  • Single carriageway224 (81%)
  • Roundabout45 (16%)
  • Dual carriageway7 (2.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4421 crashes

Car occupants make up 75% of the people killed or injured on the A4421, followed by motorcyclists (9.6%).

Casualties by road user

  • Car occupant291 (75%)
  • Motorcyclist37 (9.6%)
  • Van occupant21 (5.4%)
  • Cyclist17 (4.4%)
  • Goods vehicle occupant (over 3.5 tonnes)10 (2.6%)
  • Pedestrian4 (1%)
  • Other vehicle occupant2 (0.5%)
  • Other4 (1%)

Vehicles involved

  • Car406 (76%)
  • Motorcycle38 (7.1%)
  • Van or goods vehicle up to 3.5 tonnes33 (6.1%)
  • Goods vehicle over 3.5 tonnes31 (5.8%)
  • Pedal cycle18 (3.4%)
  • Bus or coach3 (0.6%)
  • Other vehicle3 (0.6%)
  • Other5 (0.9%)

Casualties by age

  • 0 to 53 (0.8%)
  • 6 to 107 (1.8%)
  • 11 to 156 (1.6%)
  • 16 to 2036 (9.3%)
  • 21 to 2553 (14%)
  • 26 to 3583 (22%)
  • 36 to 4573 (19%)
  • 46 to 5558 (15%)
  • 56 to 6537 (9.6%)
  • 66 to 7511 (2.8%)
  • Over 7511 (2.8%)
  • Not recorded8 (2.1%)

Drivers, passengers and pedestrians

  • Driver or rider301 (78%)
  • Passenger81 (21%)
  • Pedestrian4 (1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4421

Map of the 25 most recent crashes on the A4421

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4421 crashes by council area

Of the 276 collisions on the A4421, 275 were in Cherwell.

Collisions on the A4421 in each area, 2000 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stCherwell275385845

A4421 crashes by town

Of the 276 collisions on the A4421, 30 were in the built-up area of Bicester.

Recent crashes on the A4421

These are the 25 most recent collisions on the A4421, from 29 May 2021 to 21 November 2025.

Severity