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CrashStats

M621 accidents: crash map and statistics

Police recorded 1,121 collisions on the M621 from 1979 to 2025, with 1,689 casualties. Of those crashes, 16 were fatal and 127 serious, and 17 people were killed.

In 2025 there were 29 collisions on the M621, up 123% from 13 in 2024, with 41 casualties.

Live M621 closures, incidents and roadworks are checked every 5 minutes.

Collisions since 1979
1,121
970th highest of 4,923 roads
Casualties
1,689
1.51 per collision
Fatal collisions
16
17 people killed
Serious collisions
127
153 seriously injured
Collisions in 2025
29
Up 123% on 2024
Casualties in 2025
41
Up 116% on 2024

Crash severity on the M621

On the M621, 1.4% of collisions were fatal and 11% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal161.4%
  • Serious12711%
  • Slight97887%

Where the M621 ranks among 4,923 roads

Most collisions
970th
Most casualties
878th
Most fatal collisions
1,181st
Most serious collisions
1,582nd

M621 accidents by year

Collisions on the M621 peaked at 54 in 2006 and were down to 29 in 2025.

Collisions and casualties on the M621, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252941
20241319
20231925
20223143
20212433
20201112
20193454
20183247
20172942
20163963
20153456
20141929
20132236
20122748
20113039
20103650
20092951
20083972
20074063
20065499
20053859
20043555
20033657
20024563
20014871
20004875
19994571
19982940
19971926
19961521
19951622
1994915
19931214
19921821
1991810
199078
19891113
19881214
19871218
19861015
19851115
19841418
198357
198234
1981711
1980914
1979810

When crashes happen on the M621

Friday has the most collisions on the M621 (207), and 3pm to 6pm is the busiest time of day (284).

Collisions by day of the week

  • Monday162 (14%)
  • Tuesday172 (15%)
  • Wednesday179 (16%)
  • Thursday167 (15%)
  • Friday207 (18%)
  • Saturday122 (11%)
  • Sunday112 (10%)

Collisions by time of day

  • Midnight to 3am34 (3%)
  • 3am to 6am26 (2.3%)
  • 6am to 9am208 (19%)
  • 9am to noon166 (15%)
  • Noon to 3pm183 (16%)
  • 3pm to 6pm284 (25%)
  • 6pm to 9pm145 (13%)
  • 9pm to midnight75 (6.7%)

Collisions by month

  • January106 (9.5%)
  • February88 (7.9%)
  • March86 (7.7%)
  • April68 (6.1%)
  • May71 (6.3%)
  • June87 (7.8%)
  • July87 (7.8%)
  • August94 (8.4%)
  • September100 (8.9%)
  • October111 (9.9%)
  • November119 (11%)
  • December104 (9.3%)

Light conditions at the time

  • Daylight822 (73%)
  • Dark, street lights lit275 (25%)
  • Dark, lighting unknown17 (1.5%)
  • Dark, street lights unlit4 (0.4%)
  • Dark, no street lighting3 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in M621 crashes

On the M621, 47% of collisions happened where the speed limit was 70 mph and 64% on a dry road surface.

Speed limit at the scene

  • 20 mph1 (0.1%)
  • 30 mph105 (9.4%)
  • 40 mph43 (3.8%)
  • 50 mph430 (38%)
  • 60 mph11 (1%)
  • 70 mph531 (47%)

Weather at the time

  • Fine, no high winds908 (81%)
  • Raining, no high winds141 (13%)
  • Raining with high winds25 (2.2%)
  • Fine with high winds13 (1.2%)
  • Other32 (2.9%)
  • Not recorded2 (0.2%)

Road surface

  • Dry722 (64%)
  • Wet or damp359 (32%)
  • Frost or ice24 (2.1%)
  • Snow9 (0.8%)
  • Flood over 3cm deep6 (0.5%)
  • Oil or diesel1 (0.1%)

Type of road

  • Dual carriageway808 (72%)
  • One way street or slip road165 (15%)
  • Roundabout75 (6.7%)
  • Single carriageway69 (6.2%)
  • Not recorded4 (0.4%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in M621 crashes

Car occupants make up 85% of the people killed or injured on the M621, followed by van occupants (4.9%).

Casualties by road user

  • Car occupant1,440 (85%)
  • Van occupant82 (4.9%)
  • Motorcyclist66 (3.9%)
  • Goods vehicle occupant (over 3.5 tonnes)32 (1.9%)
  • Pedestrian29 (1.7%)
  • Other vehicle occupant10 (0.6%)
  • Taxi or private hire car occupant10 (0.6%)
  • Other20 (1.2%)

Vehicles involved

  • Car1,903 (82%)
  • Goods vehicle over 3.5 tonnes151 (6.5%)
  • Van or goods vehicle up to 3.5 tonnes149 (6.4%)
  • Motorcycle64 (2.8%)
  • Bus or coach15 (0.6%)
  • Taxi or private hire car13 (0.6%)
  • Other vehicle12 (0.5%)
  • Other14 (0.6%)

Casualties by age

  • 0 to 518 (1.1%)
  • 6 to 1017 (1%)
  • 11 to 1528 (1.7%)
  • 16 to 20146 (8.6%)
  • 21 to 25308 (18%)
  • 26 to 35473 (28%)
  • 36 to 45373 (22%)
  • 46 to 55185 (11%)
  • 56 to 65100 (5.9%)
  • 66 to 7532 (1.9%)
  • Over 758 (0.5%)
  • Not recorded1 (0.1%)

Drivers, passengers and pedestrians

  • Driver or rider1,207 (71%)
  • Passenger453 (27%)
  • Pedestrian29 (1.7%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the M621

Map of the 25 most recent crashes on the M621

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

M621 crashes by council area

Collisions on the M621 were recorded in 2 council areas. Leeds has the most, with 1,107, followed by Kirklees (14).

Collisions on the M621 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stLeeds1,1071,67316126
2ndKirklees141601

M621 crashes by town

Collisions on the M621 were recorded in 4 towns and built-up areas, led by Leeds (529) and Morley, Leeds (20).

Recent crashes on the M621

These are the 25 most recent collisions on the M621, from 25 January to 27 December 2025.

Severity