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CrashStats

A1121 accidents: crash map and statistics

Police recorded 388 collisions on the A1121 from 1979 to 2025, with 647 casualties. Of those crashes, 24 were fatal and 86 serious, and 27 people were killed.

In 2025 there were 2 collisions on the A1121, down 82% from 11 in 2024, with 3 casualties.

Collisions since 1979
388
2,347th highest of 4,923 roads
Casualties
647
1.67 per collision
Fatal collisions
24
27 people killed
Serious collisions
86
127 seriously injured
Collisions in 2025
2
Down 82% on 2024
Casualties in 2025
3
Down 86% on 2024

Crash severity on the A1121

On the A1121, 6.2% of collisions were fatal and 22% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal246.2%
  • Serious8622%
  • Slight27872%

Where the A1121 ranks among 4,923 roads

Most collisions
2,347th
Most casualties
2,027th
Most fatal collisions
836th
Most serious collisions
2,157th

A1121 accidents by year

Collisions on the A1121 peaked at 18 in 1996 and were down to 2 in 2025.

Collisions and casualties on the A1121, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202523
20241121
202378
2022912
2021711
2020713
201948
201867
2017612
201600
201533
201445
2013712
201269
2011916
2010611
2009711
200835
200769
2006712
2005915
20041114
200388
20021016
2001912
2000913
19991016
19981726
19971054
19961828
199536
19941121
19931122
1992912
1991810
19901321
1989816
1988913
19871013
19861116
19851012
198477
1983912
1982912
19811228
19801325
1979711

When crashes happen on the A1121

Friday has the most collisions on the A1121 (76), and 3pm to 6pm is the busiest time of day (97).

Collisions by day of the week

  • Monday67 (17%)
  • Tuesday54 (14%)
  • Wednesday51 (13%)
  • Thursday51 (13%)
  • Friday76 (20%)
  • Saturday45 (12%)
  • Sunday44 (11%)

Collisions by time of day

  • Midnight to 3am8 (2.1%)
  • 3am to 6am11 (2.8%)
  • 6am to 9am60 (15%)
  • 9am to noon65 (17%)
  • Noon to 3pm67 (17%)
  • 3pm to 6pm97 (25%)
  • 6pm to 9pm46 (12%)
  • 9pm to midnight34 (8.8%)

Collisions by month

  • January36 (9.3%)
  • February33 (8.5%)
  • March29 (7.5%)
  • April29 (7.5%)
  • May21 (5.4%)
  • June25 (6.4%)
  • July30 (7.7%)
  • August33 (8.5%)
  • September36 (9.3%)
  • October28 (7.2%)
  • November48 (12%)
  • December40 (10%)

Light conditions at the time

  • Daylight277 (71%)
  • Dark, no street lighting71 (18%)
  • Dark, street lights lit33 (8.5%)
  • Dark, lighting unknown5 (1.3%)
  • Dark, street lights unlit1 (0.3%)
  • Not recorded1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A1121 crashes

On the A1121, 63% of collisions happened where the speed limit was 60 mph and 59% on a dry road surface.

Speed limit at the scene

  • 30 mph37 (9.5%)
  • 40 mph66 (17%)
  • 50 mph3 (0.8%)
  • 60 mph244 (63%)
  • 70 mph38 (9.8%)

Weather at the time

  • Fine, no high winds288 (74%)
  • Raining, no high winds42 (11%)
  • Fog or mist14 (3.6%)
  • Fine with high winds12 (3.1%)
  • Other29 (7.5%)
  • Not recorded3 (0.8%)

Road surface

  • Dry230 (59%)
  • Wet or damp139 (36%)
  • Frost or ice10 (2.6%)
  • Snow6 (1.5%)
  • Flood over 3cm deep1 (0.3%)
  • Not recorded2 (0.5%)

Type of road

  • Single carriageway373 (96%)
  • Roundabout8 (2.1%)
  • Dual carriageway4 (1%)
  • One way street or slip road2 (0.5%)
  • Not recorded1 (0.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A1121 crashes

Car occupants make up 70% of the people killed or injured on the A1121, followed by motorcyclists (9.3%).

Casualties by road user

  • Car occupant452 (70%)
  • Motorcyclist60 (9.3%)
  • Bus or coach occupant47 (7.3%)
  • Cyclist28 (4.3%)
  • Pedestrian23 (3.6%)
  • Van occupant21 (3.2%)
  • Goods vehicle occupant (over 3.5 tonnes)12 (1.9%)
  • Other4 (0.6%)

Vehicles involved

  • Car565 (73%)
  • Goods vehicle over 3.5 tonnes60 (7.7%)
  • Motorcycle57 (7.3%)
  • Van or goods vehicle up to 3.5 tonnes42 (5.4%)
  • Pedal cycle27 (3.5%)
  • Other vehicle11 (1.4%)
  • Other13 (1.7%)
  • Not recorded1 (0.1%)

Casualties by age

  • 0 to 515 (2.3%)
  • 6 to 1014 (2.2%)
  • 11 to 1515 (2.3%)
  • 16 to 20124 (19%)
  • 21 to 2583 (13%)
  • 26 to 35123 (19%)
  • 36 to 4599 (15%)
  • 46 to 5563 (9.7%)
  • 56 to 6551 (7.9%)
  • 66 to 7532 (4.9%)
  • Over 7526 (4%)
  • Not recorded2 (0.3%)

Drivers, passengers and pedestrians

  • Driver or rider398 (62%)
  • Passenger226 (35%)
  • Pedestrian23 (3.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A1121

Map of the 25 most recent crashes on the A1121

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A1121 crashes by council area

Collisions on the A1121 were recorded in 2 council areas. Boston has the most, with 301, followed by North Kesteven (83).

Collisions on the A1121 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBoston3015392359
2ndNorth Kesteven83100125

A1121 crashes by town

Collisions on the A1121 were recorded in 2 towns and built-up areas, led by Sleaford (42) and Boston (23).

Recent crashes on the A1121

These are the 25 most recent collisions on the A1121, from 29 May 2022 to 6 December 2025.

Severity