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CrashStats

B121 accidents: crash map and statistics

Police recorded 242 collisions on the B121 from 1979 to 2025, with 278 casualties. Of those crashes, none were fatal and 32 were serious.

In 2025 there were 7 collisions on the B121, up 17% from 6 in 2024, with 7 casualties.

Collisions since 1979
242
2,996th highest of 4,923 roads
Casualties
278
1.15 per collision
Fatal collisions
0
No one killed
Serious collisions
32
34 seriously injured
Collisions in 2025
7
Up 17% on 2024
Casualties in 2025
7
Level with 2024

Crash severity on the B121

None of the 242 collisions on the B121 were fatal, and 13% were serious (18% across Great Britain).

Collisions by severity, 1979 to 2025

  • Fatal00%
  • Serious3213%
  • Slight21087%

Where the B121 ranks among 4,923 roads

Most collisions
2,996th
Most casualties
3,215th
Most fatal collisions
4,444th
Most serious collisions
3,541st

B121 accidents by year

Collisions on the B121 peaked at 14 in 1986 and were down to 7 in 2025.

Collisions and casualties on the B121, 1979 to 2025

  • Collisions
  • Collisions in 2025: 7
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202577
202467
202399
202245
202156
202055
201999
201833
201744
201623
201544
201445
201389
201211
201178
201033
200945
200834
200722
200611
200535
200488
200333
200214
200148
200044
199944
199822
199744
199678
199555
19941112
199344
199277
199133
199033
198978
19881011
198788
19861418
198566
1984910
198366
198246
1981611
198034
197956

When crashes happen on the B121

Wednesday has the most collisions on the B121 (39), and 3pm to 6pm is the busiest time of day (63).

Collisions by day of the week

  • Monday36 (15%)
  • Tuesday31 (13%)
  • Wednesday39 (16%)
  • Thursday35 (14%)
  • Friday34 (14%)
  • Saturday33 (14%)
  • Sunday34 (14%)

Collisions by time of day

  • Midnight to 3am4 (1.7%)
  • 3am to 6am2 (0.8%)
  • 6am to 9am17 (7%)
  • 9am to noon33 (14%)
  • Noon to 3pm50 (21%)
  • 3pm to 6pm63 (26%)
  • 6pm to 9pm45 (19%)
  • 9pm to midnight28 (12%)

Collisions by month

  • January25 (10%)
  • February20 (8.3%)
  • March18 (7.4%)
  • April22 (9.1%)
  • May24 (9.9%)
  • June22 (9.1%)
  • July19 (7.9%)
  • August14 (5.8%)
  • September20 (8.3%)
  • October18 (7.4%)
  • November26 (11%)
  • December14 (5.8%)

Light conditions at the time

  • Daylight177 (73%)
  • Dark, street lights lit60 (25%)
  • Dark, lighting unknown2 (0.8%)
  • Dark, street lights unlit2 (0.8%)
  • Dark, no street lighting1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B121 crashes

On the B121, 80% of collisions happened where the speed limit was 30 mph and 74% on a dry road surface.

Speed limit at the scene

  • 20 mph44 (18%)
  • 30 mph193 (80%)
  • 40 mph2 (0.8%)
  • 60 mph3 (1.2%)

Weather at the time

  • Fine, no high winds188 (78%)
  • Raining, no high winds26 (11%)
  • Fine with high winds3 (1.2%)
  • Raining with high winds3 (1.2%)
  • Other20 (8.3%)
  • Not recorded2 (0.8%)

Road surface

  • Dry180 (74%)
  • Wet or damp57 (24%)
  • Frost or ice2 (0.8%)
  • Not recorded3 (1.2%)

Type of road

  • Single carriageway172 (71%)
  • Roundabout36 (15%)
  • One way street or slip road10 (4.1%)
  • Dual carriageway9 (3.7%)
  • Not recorded15 (6.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B121 crashes

Car occupants make up 43% of the people killed or injured on the B121, followed by pedestrians (23%).

Casualties by road user

  • Car occupant119 (43%)
  • Pedestrian65 (23%)
  • Cyclist54 (19%)
  • Motorcyclist28 (10%)
  • Taxi or private hire car occupant4 (1.4%)
  • Van occupant4 (1.4%)
  • Other3 (1.1%)
  • Not recorded1 (0.4%)

Vehicles involved

  • Car283 (68%)
  • Pedal cycle54 (13%)
  • Motorcycle35 (8.4%)
  • Van or goods vehicle up to 3.5 tonnes22 (5.3%)
  • Taxi or private hire car8 (1.9%)
  • Goods vehicle over 3.5 tonnes7 (1.7%)
  • Bus or coach2 (0.5%)
  • Other4 (1%)

Casualties by age

  • 0 to 54 (1.4%)
  • 6 to 1013 (4.7%)
  • 11 to 1521 (7.6%)
  • 16 to 2038 (14%)
  • 21 to 2546 (17%)
  • 26 to 3565 (23%)
  • 36 to 4531 (11%)
  • 46 to 5523 (8.3%)
  • 56 to 659 (3.2%)
  • 66 to 754 (1.4%)
  • Over 756 (2.2%)
  • Not recorded18 (6.5%)

Drivers, passengers and pedestrians

  • Driver or rider157 (56%)
  • Pedestrian65 (23%)
  • Passenger56 (20%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B121

Map of the 25 most recent crashes on the B121

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

  • 25 crashes
  • Serious
  • Slight

B121 crashes by council area

Collisions on the B121 were recorded in 2 council areas. Tower Hamlets has the most, with 219, followed by Broxbourne (19).

Collisions on the B121 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stTower Hamlets219253029
2ndBroxbourne192103

B121 crashes by town

Collisions on the B121 were recorded in 3 towns and built-up areas, led by Tower Hamlets (205) and Cheshunt (11).

Recent crashes on the B121

These are the 25 most recent collisions on the B121, from 9 May 2022 to 17 December 2025.

Severity