Skip to main content
CrashStats

A121 accidents: crash map and statistics

Police recorded 4,102 collisions on the A121 from 1979 to 2025, with 5,374 casualties. Of those crashes, 55 were fatal and 689 serious, and 58 people were killed.

In 2025 there were 35 collisions on the A121, down 20% from 44 in 2024, with 43 casualties.

Collisions since 1979
4,102
263rd highest of 4,923 roads
Casualties
5,374
1.31 per collision
Fatal collisions
55
58 people killed
Serious collisions
689
812 seriously injured
Collisions in 2025
35
Down 20% on 2024
Casualties in 2025
43
Down 28% on 2024

Crash severity on the A121

On the A121, 1.3% of collisions were fatal and 17% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal551.3%
  • Serious68917%
  • Slight3,35882%

Where the A121 ranks among 4,923 roads

Most collisions
263rd
Most casualties
276th
Most fatal collisions
382nd
Most serious collisions
289th

A121 accidents by year

Collisions on the A121 peaked at 217 in 1981 and were down to 35 in 2025.

Collisions and casualties on the A121, 1979 to 2025

  • Collisions
  • Collisions in 2025: 35
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253543
20244460
20233344
20224163
20213753
20202529
20192741
20182529
20173143
20163143
20155161
20145678
20133858
20125670
20114364
20104962
20094554
20085474
20075480
20065070
200570101
200466100
20034867
20027297
20017196
200082109
19996987
199887110
1997122149
1996121152
199595120
1994108136
1993106142
1992110137
1991126162
1990131178
1989146183
1988124162
1987149183
1986129161
1985151190
1984163209
1983132178
1982206279
1981217288
1980196257
1979180222

When crashes happen on the A121

Friday has the most collisions on the A121 (679), and 3pm to 6pm is the busiest time of day (856).

Collisions by day of the week

  • Monday584 (14%)
  • Tuesday555 (14%)
  • Wednesday572 (14%)
  • Thursday605 (15%)
  • Friday679 (17%)
  • Saturday621 (15%)
  • Sunday486 (12%)

Collisions by time of day

  • Midnight to 3am172 (4.2%)
  • 3am to 6am91 (2.2%)
  • 6am to 9am510 (12%)
  • 9am to noon578 (14%)
  • Noon to 3pm717 (17%)
  • 3pm to 6pm856 (21%)
  • 6pm to 9pm652 (16%)
  • 9pm to midnight526 (13%)

Collisions by month

  • January378 (9.2%)
  • February319 (7.8%)
  • March347 (8.5%)
  • April304 (7.4%)
  • May296 (7.2%)
  • June333 (8.1%)
  • July330 (8%)
  • August330 (8%)
  • September358 (8.7%)
  • October344 (8.4%)
  • November365 (8.9%)
  • December398 (9.7%)

Light conditions at the time

  • Daylight2,795 (68%)
  • Dark, street lights lit1,098 (27%)
  • Dark, no street lighting159 (3.9%)
  • Dark, lighting unknown33 (0.8%)
  • Dark, street lights unlit16 (0.4%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A121 crashes

On the A121, 73% of collisions happened where the speed limit was 30 mph and 66% on a dry road surface.

Speed limit at the scene

  • 20 mph6 (0.1%)
  • 30 mph2,981 (73%)
  • 40 mph660 (16%)
  • 50 mph16 (0.4%)
  • 60 mph392 (9.6%)
  • 70 mph46 (1.1%)
  • Not recorded1 (under 0.1%)

Weather at the time

  • Fine, no high winds2,779 (68%)
  • Raining, no high winds643 (16%)
  • Fine with high winds41 (1%)
  • Raining with high winds38 (0.9%)
  • Other571 (14%)
  • Not recorded30 (0.7%)

Road surface

  • Dry2,708 (66%)
  • Wet or damp1,315 (32%)
  • Frost or ice47 (1.1%)
  • Snow20 (0.5%)
  • Flood over 3cm deep5 (0.1%)
  • Not recorded7 (0.2%)

Type of road

  • Single carriageway2,726 (66%)
  • Dual carriageway485 (12%)
  • Roundabout416 (10%)
  • One way street or slip road69 (1.7%)
  • Not recorded406 (9.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A121 crashes

Car occupants make up 62% of the people killed or injured on the A121, followed by motorcyclists (13%).

Casualties by road user

  • Car occupant3,311 (62%)
  • Motorcyclist678 (13%)
  • Pedestrian660 (12%)
  • Cyclist331 (6.2%)
  • Van occupant169 (3.1%)
  • Bus or coach occupant148 (2.8%)
  • Other76 (1.4%)
  • Not recorded1 (under 0.1%)

Vehicles involved

  • Car5,614 (74%)
  • Motorcycle708 (9.4%)
  • Van or goods vehicle up to 3.5 tonnes426 (5.6%)
  • Pedal cycle339 (4.5%)
  • Bus or coach194 (2.6%)
  • Goods vehicle over 3.5 tonnes184 (2.4%)
  • Other97 (1.3%)
  • Not recorded1 (under 0.1%)

Casualties by age

  • 0 to 578 (1.5%)
  • 6 to 10122 (2.3%)
  • 11 to 15256 (4.8%)
  • 16 to 201,063 (20%)
  • 21 to 25710 (13%)
  • 26 to 35986 (18%)
  • 36 to 45653 (12%)
  • 46 to 55499 (9.3%)
  • 56 to 65368 (6.8%)
  • 66 to 75224 (4.2%)
  • Over 75165 (3.1%)
  • Not recorded250 (4.7%)

Drivers, passengers and pedestrians

  • Driver or rider3,293 (61%)
  • Passenger1,421 (26%)
  • Pedestrian660 (12%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A121

Map of the 25 most recent crashes on the A121

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

  • 25 crashes
  • Serious
  • Slight

A121 crashes by council area

Collisions on the A121 were recorded in 8 council areas. Epping Forest has the most, with 2,522, followed by Broxbourne (1,400) and Redbridge (85).

Collisions on the A121 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stEpping Forest2,5223,37834420
2ndBroxbourne1,4001,75920235
3rdRedbridge85121113
4thWelwyn Hatfield4960013
5thHertsmere182205
6thEnfield121403
7thCity of London6700
8thWaltham Forest3400

A121 crashes by town

Collisions on the A121 were recorded in 11 towns and built-up areas, led by Loughton (812) and Waltham Cross (723).

Recent crashes on the A121

These are the 25 most recent collisions on the A121, from 8 April to 17 December 2025.

Severity