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CrashStats

A1099 accidents: crash map and statistics

Police recorded 557 collisions on the A1099 from 1979 to 2025, with 657 casualties. Of those crashes, 4 were fatal and 105 serious, and 4 people were killed.

In 2025 there were 9 collisions on the A1099, up 29% from 7 in 2024, with 11 casualties.

Collisions since 1979
557
1,801st highest of 4,923 roads
Casualties
657
1.18 per collision
Fatal collisions
4
4 people killed
Serious collisions
105
106 seriously injured
Collisions in 2025
9
Up 29% on 2024
Casualties in 2025
11
Up 38% on 2024

Crash severity on the A1099

On the A1099, 0.7% of collisions were fatal and 19% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal40.7%
  • Serious10519%
  • Slight44880%

Where the A1099 ranks among 4,923 roads

Most collisions
1,801st
Most casualties
2,010th
Most fatal collisions
2,815th
Most serious collisions
1,833rd

A1099 accidents by year

Collisions on the A1099 peaked at 25 in 1993 and were down to 9 in 2025.

Collisions and casualties on the A1099, 1979 to 2025

  • Collisions
  • Collisions in 2025: 9
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025911
202478
202367
202278
202133
202022
201946
201822
201755
201644
201544
2014910
201377
20121010
20111718
20101012
2009712
20081415
20071415
20062122
20051519
20041720
20031417
20021724
200167
20001215
19991517
19982123
19971314
19961315
19951417
19941925
19932528
1992911
19911114
19901011
19891011
19882025
19871718
19861921
19852024
19841314
19831218
19821522
19811924
19801215
197977

When crashes happen on the A1099

Friday has the most collisions on the A1099 (110), and 3pm to 6pm is the busiest time of day (125).

Collisions by day of the week

  • Monday73 (13%)
  • Tuesday82 (15%)
  • Wednesday92 (17%)
  • Thursday75 (13%)
  • Friday110 (20%)
  • Saturday81 (15%)
  • Sunday44 (7.9%)

Collisions by time of day

  • Midnight to 3am22 (3.9%)
  • 3am to 6am6 (1.1%)
  • 6am to 9am44 (7.9%)
  • 9am to noon90 (16%)
  • Noon to 3pm108 (19%)
  • 3pm to 6pm125 (22%)
  • 6pm to 9pm92 (17%)
  • 9pm to midnight70 (13%)

Collisions by month

  • January46 (8.3%)
  • February51 (9.2%)
  • March55 (9.9%)
  • April39 (7%)
  • May48 (8.6%)
  • June39 (7%)
  • July50 (9%)
  • August42 (7.5%)
  • September38 (6.8%)
  • October41 (7.4%)
  • November52 (9.3%)
  • December56 (10%)

Light conditions at the time

  • Daylight363 (65%)
  • Dark, street lights lit190 (34%)
  • Dark, lighting unknown3 (0.5%)
  • Dark, street lights unlit1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A1099 crashes

On the A1099, 94% of collisions happened where the speed limit was 30 mph and 69% on a dry road surface.

Speed limit at the scene

  • 20 mph6 (1.1%)
  • 30 mph524 (94%)
  • 40 mph25 (4.5%)
  • 50 mph1 (0.2%)
  • 60 mph1 (0.2%)

Weather at the time

  • Fine, no high winds438 (79%)
  • Raining, no high winds86 (15%)
  • Raining with high winds6 (1.1%)
  • Fine with high winds5 (0.9%)
  • Other20 (3.6%)
  • Not recorded2 (0.4%)

Road surface

  • Dry384 (69%)
  • Wet or damp170 (31%)
  • Snow2 (0.4%)
  • Not recorded1 (0.2%)

Type of road

  • Single carriageway422 (76%)
  • Roundabout73 (13%)
  • One way street or slip road37 (6.6%)
  • Dual carriageway24 (4.3%)
  • Not recorded1 (0.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A1099 crashes

Car occupants make up 41% of the people killed or injured on the A1099, followed by pedestrians (21%).

Casualties by road user

  • Car occupant271 (41%)
  • Pedestrian135 (21%)
  • Motorcyclist117 (18%)
  • Cyclist99 (15%)
  • Bus or coach occupant13 (2%)
  • Taxi or private hire car occupant6 (0.9%)
  • Other14 (2.1%)
  • Not recorded2 (0.3%)

Vehicles involved

  • Car687 (68%)
  • Motorcycle121 (12%)
  • Pedal cycle105 (10%)
  • Van or goods vehicle up to 3.5 tonnes32 (3.2%)
  • Bus or coach24 (2.4%)
  • Taxi or private hire car18 (1.8%)
  • Goods vehicle over 3.5 tonnes16 (1.6%)
  • Other11 (1.1%)

Casualties by age

  • 0 to 510 (1.5%)
  • 6 to 108 (1.2%)
  • 11 to 1527 (4.1%)
  • 16 to 20165 (25%)
  • 21 to 25101 (15%)
  • 26 to 35112 (17%)
  • 36 to 4587 (13%)
  • 46 to 5551 (7.8%)
  • 56 to 6538 (5.8%)
  • 66 to 7518 (2.7%)
  • Over 7514 (2.1%)
  • Not recorded26 (4%)

Drivers, passengers and pedestrians

  • Driver or rider395 (60%)
  • Pedestrian135 (21%)
  • Passenger127 (19%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A1099

Map of the 25 most recent crashes on the A1099

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

  • 25 crashes
  • Serious
  • Slight

A1099 crashes by council area

All 557 collisions on the A1099 were in Chelmsford.

Collisions on the A1099 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stChelmsford5576574105

A1099 crashes by town

Of the 557 collisions on the A1099, 535 were in the built-up area of Chelmsford.

Recent crashes on the A1099

These are the 25 most recent collisions on the A1099, from 9 July 2022 to 28 December 2025.

Severity