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CrashStats

B4066 accidents: crash map and statistics

Police recorded 579 collisions on the B4066 from 1979 to 2025, with 827 casualties. Of those crashes, 26 were fatal and 164 serious, and 31 people were killed.

In 2025 there were 4 collisions on the B4066, down 43% from 7 in 2024, with 4 casualties.

Collisions since 1979
579
1,742nd highest of 4,923 roads
Casualties
827
1.43 per collision
Fatal collisions
26
31 people killed
Serious collisions
164
197 seriously injured
Collisions in 2025
4
Down 43% on 2024
Casualties in 2025
4
Down 67% on 2024

Crash severity on the B4066

On the B4066, 4.5% of collisions were fatal and 28% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal264.5%
  • Serious16428%
  • Slight38967%

Where the B4066 ranks among 4,923 roads

Most collisions
1,742nd
Most casualties
1,676th
Most fatal collisions
771st
Most serious collisions
1,270th

B4066 accidents by year

Collisions on the B4066 peaked at 28 in 1981 and were down to 4 in 2025.

Collisions and casualties on the B4066, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202544
2024712
202379
20221114
20211015
20201116
201934
201868
2017611
2016914
2015715
201479
201335
2012814
201135
2010510
2009810
2008713
20071320
20061015
20051721
20041519
20031314
20021012
20011218
20001725
19991625
19981321
19971424
19961016
19951320
1994612
19931930
19921118
19911216
19901829
19891123
19881516
19872230
19861115
19852231
19841927
19832126
19822631
19812837
19801719
19792629

When crashes happen on the B4066

Wednesday has the most collisions on the B4066 (95), and 3pm to 6pm is the busiest time of day (147).

Collisions by day of the week

  • Monday83 (14%)
  • Tuesday75 (13%)
  • Wednesday95 (16%)
  • Thursday73 (13%)
  • Friday94 (16%)
  • Saturday87 (15%)
  • Sunday72 (12%)

Collisions by time of day

  • Midnight to 3am27 (4.7%)
  • 3am to 6am10 (1.7%)
  • 6am to 9am72 (12%)
  • 9am to noon57 (9.8%)
  • Noon to 3pm97 (17%)
  • 3pm to 6pm147 (25%)
  • 6pm to 9pm93 (16%)
  • 9pm to midnight76 (13%)

Collisions by month

  • January37 (6.4%)
  • February39 (6.7%)
  • March49 (8.5%)
  • April50 (8.6%)
  • May53 (9.2%)
  • June42 (7.3%)
  • July53 (9.2%)
  • August43 (7.4%)
  • September44 (7.6%)
  • October55 (9.5%)
  • November61 (11%)
  • December53 (9.2%)

Light conditions at the time

  • Daylight395 (68%)
  • Dark, no street lighting100 (17%)
  • Dark, street lights lit64 (11%)
  • Dark, lighting unknown17 (2.9%)
  • Dark, street lights unlit3 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4066 crashes

On the B4066, 52% of collisions happened where the speed limit was 60 mph and 64% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (0.3%)
  • 30 mph165 (28%)
  • 40 mph68 (12%)
  • 50 mph23 (4%)
  • 60 mph301 (52%)
  • 70 mph20 (3.5%)

Weather at the time

  • Fine, no high winds454 (78%)
  • Raining, no high winds76 (13%)
  • Fog or mist10 (1.7%)
  • Fine with high winds9 (1.6%)
  • Other22 (3.8%)
  • Not recorded8 (1.4%)

Road surface

  • Dry372 (64%)
  • Wet or damp183 (32%)
  • Frost or ice19 (3.3%)
  • Snow3 (0.5%)
  • Flood over 3cm deep1 (0.2%)
  • Mud1 (0.2%)

Type of road

  • Single carriageway555 (96%)
  • Roundabout16 (2.8%)
  • One way street or slip road3 (0.5%)
  • Dual carriageway2 (0.3%)
  • Not recorded3 (0.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4066 crashes

Car occupants make up 68% of the people killed or injured on the B4066, followed by motorcyclists (16%).

Casualties by road user

  • Car occupant563 (68%)
  • Motorcyclist131 (16%)
  • Pedestrian48 (5.8%)
  • Cyclist37 (4.5%)
  • Van occupant20 (2.4%)
  • Bus or coach occupant10 (1.2%)
  • Goods vehicle occupant (over 3.5 tonnes)9 (1.1%)
  • Other9 (1.1%)

Vehicles involved

  • Car743 (73%)
  • Motorcycle133 (13%)
  • Van or goods vehicle up to 3.5 tonnes45 (4.4%)
  • Pedal cycle39 (3.8%)
  • Goods vehicle over 3.5 tonnes22 (2.2%)
  • Other vehicle18 (1.8%)
  • Bus or coach7 (0.7%)
  • Other9 (0.9%)

Casualties by age

  • 0 to 513 (1.6%)
  • 6 to 1023 (2.8%)
  • 11 to 1523 (2.8%)
  • 16 to 20244 (30%)
  • 21 to 25119 (14%)
  • 26 to 35118 (14%)
  • 36 to 4594 (11%)
  • 46 to 5586 (10%)
  • 56 to 6549 (5.9%)
  • 66 to 7534 (4.1%)
  • Over 7524 (2.9%)

Drivers, passengers and pedestrians

  • Driver or rider549 (66%)
  • Passenger230 (28%)
  • Pedestrian48 (5.8%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4066

Map of the 25 most recent crashes on the B4066

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4066 crashes by council area

Collisions on the B4066 were recorded in 2 council areas. Stroud has the most, with 570, followed by South Gloucestershire (7).

Collisions on the B4066 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stStroud57081423164
2ndSouth Gloucestershire71120

B4066 crashes by town

Collisions on the B4066 were recorded in 4 towns and built-up areas, led by Dursley (45) and Cam (34).

Recent crashes on the B4066

These are the 25 most recent collisions on the B4066, from 15 May 2022 to 28 August 2025.

Severity