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CrashStats

A4311 accidents: crash map and statistics

Police recorded 1,091 collisions on the A4311 from 1984 to 2025, with 1,352 casualties. Of those crashes, 8 were fatal and 156 serious, and 8 people were killed.

In 2025 there were 18 collisions on the A4311, down 18% from 22 in 2024, with 28 casualties.

Collisions since 1984
1,091
998th highest of 4,923 roads
Casualties
1,352
1.24 per collision
Fatal collisions
8
8 people killed
Serious collisions
156
160 seriously injured
Collisions in 2025
18
Down 18% on 2024
Casualties in 2025
28
Up 17% on 2024

Crash severity on the A4311

On the A4311, 0.7% of collisions were fatal and 14% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1984 to 2025

  • Fatal80.7%
  • Serious15614%
  • Slight92785%

Where the A4311 ranks among 4,923 roads

Most collisions
998th
Most casualties
1,095th
Most fatal collisions
1,937th
Most serious collisions
1,331st

A4311 accidents by year

Collisions on the A4311 peaked at 41 in 1988 and were down to 18 in 2025.

Collisions and casualties on the A4311, 1984 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251828
20242224
20233147
20222632
20211318
20201419
20192025
20181821
20171215
20162229
20153040
20142026
20131417
20122230
20112226
20102432
20092839
20082632
20073448
20062530
20051519
20043951
20032833
20022836
20013647
20003948
19994048
19982534
19972328
19962833
19953844
19942528
19932730
19922530
19913134
19902328
19892325
19884147
19873443
19863742
19851919
19842627

When crashes happen on the A4311

Thursday has the most collisions on the A4311 (186), and 3pm to 6pm is the busiest time of day (256).

Collisions by day of the week

  • Monday158 (14%)
  • Tuesday171 (16%)
  • Wednesday154 (14%)
  • Thursday186 (17%)
  • Friday183 (17%)
  • Saturday150 (14%)
  • Sunday89 (8.2%)

Collisions by time of day

  • Midnight to 3am28 (2.6%)
  • 3am to 6am20 (1.8%)
  • 6am to 9am176 (16%)
  • 9am to noon130 (12%)
  • Noon to 3pm192 (18%)
  • 3pm to 6pm256 (23%)
  • 6pm to 9pm177 (16%)
  • 9pm to midnight112 (10%)

Collisions by month

  • January106 (9.7%)
  • February70 (6.4%)
  • March92 (8.4%)
  • April78 (7.1%)
  • May65 (6%)
  • June82 (7.5%)
  • July108 (9.9%)
  • August74 (6.8%)
  • September93 (8.5%)
  • October104 (9.5%)
  • November118 (11%)
  • December101 (9.3%)

Light conditions at the time

  • Daylight748 (69%)
  • Dark, street lights lit321 (29%)
  • Dark, street lights unlit12 (1.1%)
  • Dark, no street lighting10 (0.9%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4311 crashes

On the A4311, 55% of collisions happened where the speed limit was 30 mph and 67% on a dry road surface.

Speed limit at the scene

  • 20 mph1 (0.1%)
  • 30 mph596 (55%)
  • 40 mph464 (43%)
  • 50 mph1 (0.1%)
  • 60 mph29 (2.7%)

Weather at the time

  • Fine, no high winds863 (79%)
  • Raining, no high winds149 (14%)
  • Raining with high winds23 (2.1%)
  • Fine with high winds20 (1.8%)
  • Other20 (1.8%)
  • Not recorded16 (1.5%)

Road surface

  • Dry732 (67%)
  • Wet or damp340 (31%)
  • Frost or ice13 (1.2%)
  • Snow2 (0.2%)
  • Other3 (0.3%)
  • Not recorded1 (0.1%)

Type of road

  • Single carriageway556 (51%)
  • Roundabout392 (36%)
  • Dual carriageway139 (13%)
  • One way street or slip road4 (0.4%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4311 crashes

Car occupants make up 48% of the people killed or injured on the A4311, followed by motorcyclists (21%).

Casualties by road user

  • Car occupant653 (48%)
  • Motorcyclist282 (21%)
  • Cyclist190 (14%)
  • Pedestrian130 (9.6%)
  • Bus or coach occupant41 (3%)
  • Van occupant22 (1.6%)
  • Other33 (2.4%)
  • Not recorded1 (0.1%)

Vehicles involved

  • Car1,318 (64%)
  • Motorcycle288 (14%)
  • Pedal cycle199 (9.6%)
  • Van or goods vehicle up to 3.5 tonnes114 (5.5%)
  • Bus or coach49 (2.4%)
  • Goods vehicle over 3.5 tonnes48 (2.3%)
  • Taxi or private hire car23 (1.1%)
  • Other28 (1.4%)

Casualties by age

  • 0 to 520 (1.5%)
  • 6 to 1034 (2.5%)
  • 11 to 1570 (5.2%)
  • 16 to 20240 (18%)
  • 21 to 25192 (14%)
  • 26 to 35303 (22%)
  • 36 to 45191 (14%)
  • 46 to 55148 (11%)
  • 56 to 6587 (6.4%)
  • 66 to 7536 (2.7%)
  • Over 7527 (2%)
  • Not recorded4 (0.3%)

Drivers, passengers and pedestrians

  • Driver or rider954 (71%)
  • Passenger268 (20%)
  • Pedestrian130 (9.6%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4311

Map of the 25 most recent crashes on the A4311

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

  • 25 crashes
  • Serious
  • Slight

A4311 crashes by council area

Of the 1,091 collisions on the A4311, 1,090 were in Swindon.

Collisions on the A4311 in each area, 1984 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSwindon1,0901,3518155

A4311 crashes by town

Collisions on the A4311 were recorded in 2 towns and built-up areas, led by Swindon, Swindon (607) and Stratton St Margaret (174).

Recent crashes on the A4311

These are the 25 most recent collisions on the A4311, from 30 October 2024 to 28 December 2025.

Severity