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CrashStats

A4320 accidents: crash map and statistics

Police recorded 542 collisions on the A4320 from 1979 to 2025, with 666 casualties. Of those crashes, 6 were fatal and 70 serious, and 7 people were killed.

In 2025 there were 12 collisions on the A4320, down 37% from 19 in 2024, with 13 casualties.

Collisions since 1979
542
1,846th highest of 4,923 roads
Casualties
666
1.23 per collision
Fatal collisions
6
7 people killed
Serious collisions
70
71 seriously injured
Collisions in 2025
12
Down 37% on 2024
Casualties in 2025
13
Down 43% on 2024

Crash severity on the A4320

On the A4320, 1.1% of collisions were fatal and 13% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal61.1%
  • Serious7013%
  • Slight46686%

Where the A4320 ranks among 4,923 roads

Most collisions
1,846th
Most casualties
1,991st
Most fatal collisions
2,299th
Most serious collisions
2,482nd

A4320 accidents by year

Collisions on the A4320 peaked at 23 in 2001 and were down to 12 in 2025.

Collisions and casualties on the A4320, 1979 to 2025

  • Collisions
  • Collisions in 2025: 12
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251213
20241923
20231010
20221219
20211414
20201115
201966
20181519
201768
20161316
201567
20141516
20131214
20121113
20111116
20101619
20091014
200855
20072128
20062023
20051722
20042228
20032128
20021314
20012327
20001525
19991723
19981620
199788
199689
199555
1994814
199366
199258
19911621
1990810
198999
1988811
198745
19861213
19851212
198479
19831111
19821214
198155
198055
197946

When crashes happen on the A4320

Friday has the most collisions on the A4320 (95), and 3pm to 6pm is the busiest time of day (127).

Collisions by day of the week

  • Monday69 (13%)
  • Tuesday77 (14%)
  • Wednesday82 (15%)
  • Thursday80 (15%)
  • Friday95 (18%)
  • Saturday82 (15%)
  • Sunday57 (11%)

Collisions by time of day

  • Midnight to 3am17 (3.1%)
  • 3am to 6am16 (3%)
  • 6am to 9am64 (12%)
  • 9am to noon71 (13%)
  • Noon to 3pm103 (19%)
  • 3pm to 6pm127 (23%)
  • 6pm to 9pm74 (14%)
  • 9pm to midnight70 (13%)

Collisions by month

  • January63 (12%)
  • February31 (5.7%)
  • March38 (7%)
  • April42 (7.7%)
  • May40 (7.4%)
  • June38 (7%)
  • July50 (9.2%)
  • August39 (7.2%)
  • September48 (8.9%)
  • October48 (8.9%)
  • November56 (10%)
  • December49 (9%)

Light conditions at the time

  • Daylight376 (69%)
  • Dark, street lights lit157 (29%)
  • Dark, lighting unknown5 (0.9%)
  • Dark, no street lighting2 (0.4%)
  • Dark, street lights unlit2 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4320 crashes

On the A4320, 64% of collisions happened where the speed limit was 30 mph and 68% on a dry road surface.

Speed limit at the scene

  • 20 mph12 (2.2%)
  • 30 mph347 (64%)
  • 40 mph67 (12%)
  • 50 mph111 (20%)
  • 60 mph5 (0.9%)

Weather at the time

  • Fine, no high winds411 (76%)
  • Raining, no high winds79 (15%)
  • Raining with high winds8 (1.5%)
  • Fine with high winds5 (0.9%)
  • Other28 (5.2%)
  • Not recorded11 (2%)

Road surface

  • Dry371 (68%)
  • Wet or damp163 (30%)
  • Frost or ice5 (0.9%)
  • Flood over 3cm deep1 (0.2%)
  • Snow1 (0.2%)
  • Not recorded1 (0.2%)

Type of road

  • Dual carriageway298 (55%)
  • Roundabout194 (36%)
  • Single carriageway40 (7.4%)
  • One way street or slip road9 (1.7%)
  • Not recorded1 (0.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4320 crashes

Car occupants make up 61% of the people killed or injured on the A4320, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant404 (61%)
  • Motorcyclist95 (14%)
  • Cyclist68 (10%)
  • Pedestrian61 (9.2%)
  • Van occupant16 (2.4%)
  • Bus or coach occupant8 (1.2%)
  • Other12 (1.8%)
  • Not recorded2 (0.3%)

Vehicles involved

  • Car757 (73%)
  • Motorcycle100 (9.7%)
  • Pedal cycle69 (6.7%)
  • Van or goods vehicle up to 3.5 tonnes45 (4.4%)
  • Goods vehicle over 3.5 tonnes32 (3.1%)
  • Other vehicle12 (1.2%)
  • Taxi or private hire car9 (0.9%)
  • Other10 (1%)

Casualties by age

  • 0 to 59 (1.4%)
  • 6 to 1015 (2.3%)
  • 11 to 1521 (3.2%)
  • 16 to 2079 (12%)
  • 21 to 25102 (15%)
  • 26 to 35189 (28%)
  • 36 to 45114 (17%)
  • 46 to 5570 (11%)
  • 56 to 6536 (5.4%)
  • 66 to 7519 (2.9%)
  • Over 759 (1.4%)
  • Not recorded3 (0.5%)

Drivers, passengers and pedestrians

  • Driver or rider464 (70%)
  • Passenger141 (21%)
  • Pedestrian61 (9.2%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4320

Map of the 25 most recent crashes on the A4320

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4320 crashes by council area

Collisions on the A4320 were recorded in 2 council areas. Bristol has the most, with 535, followed by South Gloucestershire (5).

Collisions on the A4320 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBristol535654669
2ndSouth Gloucestershire5700

A4320 crashes by town

Of the 542 collisions on the A4320, 528 were in the built-up area of Bristol.

Recent crashes on the A4320

These are the 25 most recent collisions on the A4320, from 24 May 2024 to 1 November 2025.

Severity