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CrashStats

B4121 accidents: crash map and statistics

Police recorded 1,033 collisions on the B4121 from 1979 to 2025, with 1,433 casualties. Of those crashes, 14 were fatal and 190 serious, and 14 people were killed.

In 2025 there were 18 collisions on the B4121, down 25% from 24 in 2024, with 22 casualties.

Collisions since 1979
1,033
1,064th highest of 4,923 roads
Casualties
1,433
1.39 per collision
Fatal collisions
14
14 people killed
Serious collisions
190
225 seriously injured
Collisions in 2025
18
Down 25% on 2024
Casualties in 2025
22
Down 37% on 2024

Crash severity on the B4121

On the B4121, 1.4% of collisions were fatal and 18% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal141.4%
  • Serious19018%
  • Slight82980%

Where the B4121 ranks among 4,923 roads

Most collisions
1,064th
Most casualties
1,034th
Most fatal collisions
1,329th
Most serious collisions
1,093rd

B4121 accidents by year

Collisions on the B4121 peaked at 40 in 2007 and were down to 18 in 2025.

Collisions and casualties on the B4121, 1979 to 2025

  • Collisions
  • Collisions in 2025: 18
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251822
20242435
20231930
20221926
20211733
20201825
20192032
20182638
20172129
20163039
20152741
20143343
20132836
20122944
20112734
20103752
20093753
20082837
20074052
20063239
20053539
20042025
20031618
20022226
20011722
20002027
19992633
19981826
19971618
19961014
19951723
19941729
19932130
199277
19911723
19902133
19892233
19881422
19871925
19861928
19851825
19841933
19831627
19822231
19811919
19802138
19791419

When crashes happen on the B4121

Friday has the most collisions on the B4121 (169), and 3pm to 6pm is the busiest time of day (254).

Collisions by day of the week

  • Monday132 (13%)
  • Tuesday164 (16%)
  • Wednesday152 (15%)
  • Thursday160 (15%)
  • Friday169 (16%)
  • Saturday145 (14%)
  • Sunday111 (11%)

Collisions by time of day

  • Midnight to 3am38 (3.7%)
  • 3am to 6am24 (2.3%)
  • 6am to 9am140 (14%)
  • 9am to noon155 (15%)
  • Noon to 3pm182 (18%)
  • 3pm to 6pm254 (25%)
  • 6pm to 9pm146 (14%)
  • 9pm to midnight94 (9.1%)

Collisions by month

  • January89 (8.6%)
  • February72 (7%)
  • March83 (8%)
  • April68 (6.6%)
  • May80 (7.7%)
  • June83 (8%)
  • July74 (7.2%)
  • August79 (7.6%)
  • September106 (10%)
  • October117 (11%)
  • November92 (8.9%)
  • December90 (8.7%)

Light conditions at the time

  • Daylight743 (72%)
  • Dark, street lights lit279 (27%)
  • Dark, lighting unknown5 (0.5%)
  • Dark, street lights unlit5 (0.5%)
  • Dark, no street lighting1 (0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4121 crashes

On the B4121, 78% of collisions happened where the speed limit was 30 mph and 62% on a dry road surface.

Speed limit at the scene

  • 20 mph5 (0.5%)
  • 30 mph810 (78%)
  • 40 mph217 (21%)
  • 50 mph1 (0.1%)

Weather at the time

  • Fine, no high winds727 (70%)
  • Raining, no high winds183 (18%)
  • Fine with high winds12 (1.2%)
  • Raining with high winds12 (1.2%)
  • Other73 (7.1%)
  • Not recorded26 (2.5%)

Road surface

  • Dry643 (62%)
  • Wet or damp367 (36%)
  • Frost or ice16 (1.5%)
  • Snow3 (0.3%)
  • Flood over 3cm deep1 (0.1%)
  • Not recorded3 (0.3%)

Type of road

  • Single carriageway608 (59%)
  • Dual carriageway366 (35%)
  • Roundabout54 (5.2%)
  • One way street or slip road2 (0.2%)
  • Not recorded3 (0.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4121 crashes

Car occupants make up 62% of the people killed or injured on the B4121, followed by pedestrians (14%).

Casualties by road user

  • Car occupant887 (62%)
  • Pedestrian204 (14%)
  • Motorcyclist153 (11%)
  • Cyclist69 (4.8%)
  • Van occupant44 (3.1%)
  • Bus or coach occupant36 (2.5%)
  • Other37 (2.6%)
  • Not recorded3 (0.2%)

Vehicles involved

  • Car1,464 (77%)
  • Motorcycle161 (8.5%)
  • Van or goods vehicle up to 3.5 tonnes94 (4.9%)
  • Pedal cycle70 (3.7%)
  • Bus or coach38 (2%)
  • Goods vehicle over 3.5 tonnes33 (1.7%)
  • Other38 (2%)
  • Not recorded3 (0.2%)

Casualties by age

  • 0 to 533 (2.3%)
  • 6 to 1046 (3.2%)
  • 11 to 1590 (6.3%)
  • 16 to 20201 (14%)
  • 21 to 25201 (14%)
  • 26 to 35288 (20%)
  • 36 to 45218 (15%)
  • 46 to 55140 (9.8%)
  • 56 to 6592 (6.4%)
  • 66 to 7554 (3.8%)
  • Over 7536 (2.5%)
  • Not recorded34 (2.4%)

Drivers, passengers and pedestrians

  • Driver or rider825 (58%)
  • Passenger404 (28%)
  • Pedestrian204 (14%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4121

Map of the 25 most recent crashes on the B4121

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

  • 25 crashes
  • Serious
  • Slight

B4121 crashes by council area

All 1,033 collisions on the B4121 were in Birmingham.

Collisions on the B4121 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBirmingham1,0331,43314190

B4121 crashes by town

Of the 1,033 collisions on the B4121, 905 were in the built-up area of Birmingham.

Recent crashes on the B4121

These are the 25 most recent collisions on the B4121, from 22 August 2024 to 26 December 2025.

Severity