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CrashStats

CM4 road accidents: crash map and statistics

Police recorded 2,461 road traffic collisions in the CM4 postcode district, Chelmsford, from 1979 to 2025, and 3,471 people were killed or injured in them. Of those collisions, 50 were fatal and 594 were serious.

In 2025 police recorded 29 collisions, up 16% on 2024 (25).

Collisions since 1979
2,461
1,534th of 2,813 postcode districts, highest first
Casualties
3,471
1.41 per collision
Fatal collisions
50
53 people killed
Serious collisions
594
703 seriously injured
Collisions in 2025
29
Up 16% on 2024
Casualties in 2025
39
Up 8% on 2024

Road collision statistics for CM4

Collisions by severity, 1979 to 2025

  • Fatal502%
  • Serious59424%
  • Slight1,81774%

What the data shows

  • CM4 had 276 collisions from 2016 to 2025, 33% fewer than the 410 from 2006 to 2015.
  • 26% of collisions in CM4 were fatal or serious, against 20% across Great Britain.
  • 263 children under 16 were killed or injured in CM4, 7.7% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 39% of collisions in CM4.

Where CM4 ranks among 2,813 postcode districts

Most collisions
1,534th
Most casualties
1,498th
Most fatal collisions
1,189th
Most serious collisions
1,225th

Collisions by day of the week

  • Monday365 (15%)
  • Tuesday298 (12%)
  • Wednesday343 (14%)
  • Thursday364 (15%)
  • Friday407 (17%)
  • Saturday353 (14%)
  • Sunday331 (13%)

Light conditions

  • Daylight1,691 (69%)
  • Dark, no street lighting546 (22%)
  • Dark, street lights lit196 (8%)
  • Dark, lighting unknown24 (1%)
  • Dark, street lights unlit4 (0.2%)

Type of road

  • Single carriageway1,580 (64%)
  • Dual carriageway726 (30%)
  • Roundabout112 (4.6%)
  • One way street or slip road41 (1.7%)
  • Not recorded2 (0.1%)

Speed limit at the scene

  • 20 mph7 (0.3%)
  • 30 mph448 (18%)
  • 40 mph255 (10%)
  • 50 mph16 (0.7%)
  • 60 mph923 (38%)
  • 70 mph812 (33%)

Weather at the time

  • Fine, no high winds1,918 (78%)
  • Raining, no high winds307 (12%)
  • Fog or mist52 (2.1%)
  • Fine with high winds39 (1.6%)
  • Raining with high winds32 (1.3%)
  • Snowing, no high winds25 (1%)
  • Snowing with high winds4 (0.2%)
  • Other72 (2.9%)
  • Not recorded12 (0.5%)

Who was hurt

  • Car occupant2,503 (72%)
  • Motorcyclist351 (10%)
  • Pedestrian189 (5.4%)
  • Van occupant157 (4.5%)
  • Cyclist136 (3.9%)
  • Goods vehicle occupant (over 3.5 tonnes)62 (1.8%)
  • Bus or coach occupant26 (0.7%)
  • Other vehicle occupant16 (0.5%)
  • Minibus occupant15 (0.4%)
  • Taxi or private hire car occupant10 (0.3%)
  • Other6 (0.2%)

Source: Department for Transport, STATS19 road safety data

CM4 road accidents by year

Collisions and casualties in CM4, 1979 to 2025

Collisions in CM4 peaked at 87 in 1985; 2025 had 29.

  • Collisions
  • Collisions in 2025: 29
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20252939
20242536
20231928
20222839
20213143
20202936
20193038
20182529
20173446
20162640
20153958
20142739
20133238
20123140
20113952
20104466
20093859
20084960
20075774
20065470
20055884
20045779
20035873
20026292
20016687
20005376
19996691
19985873
19976089
19966283
19955384
199473100
19936588
199269103
19916794
19907499
198982126
198879121
198781100
19867194
198587140
198472109
198374118
19826391
19815381
19805386
19795980

Map of recent crashes in CM4

Map of the 24 most recent crashes in CM4

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in CM4

The 24 most recent collisions in CM4 happened between 1 April and 20 December 2025.

Severity

Crashes by road in CM4

The A12 has the most collisions in CM4, 716 of 2,461 (29%), followed by the B1007 (321).

Collisions in CM4 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA127161,03921158
2ndB1007321447564
3rdB1002309409482
4thA414262415978
5thA10165987310
6thA1294501
7thA1764602
8thA10233401
9thA1273300
10thB4143400

Council areas covering CM4

Collisions in CM4 were recorded in 4 council areas. Chelmsford has 1,274 of 2,461 (52%).

Collisions in CM4 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stChelmsford1,2741,87025290
2ndBrentwood9881,28619248
3rdEpping Forest154250646
4thBasildon415709

Towns in CM4

Collisions in CM4 were recorded in 4 towns, led by Ingatestone (295) and Stock (162).