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CrashStats

B4509 accidents: crash map and statistics

Police recorded 158 collisions on the B4509 from 1979 to 2025, with 226 casualties. Of those crashes, 3 were fatal and 43 serious, and 3 people were killed.

In 2025 there were 3 collisions on the B4509, up 200% from 1 in 2024, with 3 casualties.

Collisions since 1979
158
3,531st highest of 4,923 roads
Casualties
226
1.43 per collision
Fatal collisions
3
3 people killed
Serious collisions
43
52 seriously injured
Collisions in 2025
3
Up 200% on 2024
Casualties in 2025
3
Up 200% on 2024

Crash severity on the B4509

On the B4509, 1.9% of collisions were fatal and 27% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal31.9%
  • Serious4327%
  • Slight11271%

Where the B4509 ranks among 4,923 roads

Most collisions
3,531st
Most casualties
3,472nd
Most fatal collisions
3,114th
Most serious collisions
3,175th

B4509 accidents by year

Collisions on the B4509 peaked at 11 in 2004 and were down to 3 in 2025.

Collisions and casualties on the B4509, 1979 to 2025

  • Collisions
  • Collisions in 2025: 3
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202533
202411
202322
202235
202122
202000
201900
201824
201758
201613
201523
201400
201312
201247
201146
201045
200956
200845
200735
200656
200536
20041114
200367
2002817
200144
200059
199967
199811
199746
199658
199533
199436
199344
199223
199133
199012
198923
198822
198736
198679
198534
198434
198322
198268
198135
198047
197933

When crashes happen on the B4509

Wednesday has the most collisions on the B4509 (30), and 3pm to 6pm is the busiest time of day (52).

Collisions by day of the week

  • Monday22 (14%)
  • Tuesday21 (13%)
  • Wednesday30 (19%)
  • Thursday18 (11%)
  • Friday21 (13%)
  • Saturday24 (15%)
  • Sunday22 (14%)

Collisions by time of day

  • Midnight to 3am4 (2.5%)
  • 3am to 6am2 (1.3%)
  • 6am to 9am24 (15%)
  • 9am to noon23 (15%)
  • Noon to 3pm13 (8.2%)
  • 3pm to 6pm52 (33%)
  • 6pm to 9pm28 (18%)
  • 9pm to midnight12 (7.6%)

Collisions by month

  • January16 (10%)
  • February11 (7%)
  • March12 (7.6%)
  • April17 (11%)
  • May8 (5.1%)
  • June18 (11%)
  • July7 (4.4%)
  • August13 (8.2%)
  • September16 (10%)
  • October10 (6.3%)
  • November13 (8.2%)
  • December17 (11%)

Light conditions at the time

  • Daylight108 (68%)
  • Dark, no street lighting41 (26%)
  • Dark, street lights lit5 (3.2%)
  • Dark, lighting unknown4 (2.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4509 crashes

On the B4509, 48% of collisions happened where the speed limit was 60 mph and 56% on a dry road surface.

Speed limit at the scene

  • 30 mph16 (10%)
  • 40 mph53 (34%)
  • 50 mph7 (4.4%)
  • 60 mph76 (48%)
  • 70 mph6 (3.8%)

Weather at the time

  • Fine, no high winds112 (71%)
  • Raining, no high winds28 (18%)
  • Raining with high winds6 (3.8%)
  • Fine with high winds1 (0.6%)
  • Other10 (6.3%)
  • Not recorded1 (0.6%)

Road surface

  • Dry88 (56%)
  • Wet or damp64 (41%)
  • Frost or ice4 (2.5%)
  • Flood over 3cm deep1 (0.6%)
  • Oil or diesel1 (0.6%)

Type of road

  • Single carriageway156 (99%)
  • Dual carriageway2 (1.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4509 crashes

Car occupants make up 82% of the people killed or injured on the B4509, followed by motorcyclists (12%).

Casualties by road user

  • Car occupant185 (82%)
  • Motorcyclist27 (12%)
  • Pedestrian4 (1.8%)
  • Van occupant4 (1.8%)
  • Cyclist3 (1.3%)
  • Goods vehicle occupant (over 3.5 tonnes)1 (0.4%)
  • Minibus occupant1 (0.4%)
  • Other vehicle occupant1 (0.4%)

Vehicles involved

  • Car244 (79%)
  • Motorcycle27 (8.7%)
  • Goods vehicle over 3.5 tonnes16 (5.2%)
  • Van or goods vehicle up to 3.5 tonnes10 (3.2%)
  • Minibus3 (1%)
  • Other vehicle3 (1%)
  • Other5 (1.6%)
  • Not recorded1 (0.3%)

Casualties by age

  • 0 to 53 (1.3%)
  • 6 to 104 (1.8%)
  • 11 to 154 (1.8%)
  • 16 to 2038 (17%)
  • 21 to 2531 (14%)
  • 26 to 3549 (22%)
  • 36 to 4539 (17%)
  • 46 to 5528 (12%)
  • 56 to 6515 (6.6%)
  • 66 to 7513 (5.8%)
  • Over 752 (0.9%)

Drivers, passengers and pedestrians

  • Driver or rider166 (73%)
  • Passenger56 (25%)
  • Pedestrian4 (1.8%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4509

Map of the 25 most recent crashes on the B4509

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

  • 25 crashes
  • Serious
  • Slight

B4509 crashes by council area

Collisions on the B4509 were recorded in 2 council areas. South Gloucestershire has the most, with 143, followed by Stroud (15).

Collisions on the B4509 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSouth Gloucestershire143206336
2ndStroud152007

Recent crashes on the B4509

These are the 25 most recent collisions on the B4509, from 26 August 2012 to 29 June 2025.

Severity