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CrashStats

B4511 accidents: crash map and statistics

Police recorded 108 collisions on the B4511 from 1979 to 2025, with 176 casualties. Of those crashes, 3 were fatal and 21 serious, and 3 people were killed.

In 2025 there was 1 collision on the B4511, down 50% from 2 in 2024, with 1 casualty.

Collisions since 1979
108
3,960th highest of 4,923 roads
Casualties
176
1.63 per collision
Fatal collisions
3
3 people killed
Serious collisions
21
25 seriously injured
Collisions in 2025
1
Down 50% on 2024
Casualties in 2025
1
Down 50% on 2024

Crash severity on the B4511

On the B4511, 2.8% of collisions were fatal and 19% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal32.8%
  • Serious2119%
  • Slight8478%

Where the B4511 ranks among 4,923 roads

Most collisions
3,960th
Most casualties
3,766th
Most fatal collisions
3,114th
Most serious collisions
3,992nd

B4511 accidents by year

Collisions on the B4511 peaked at 7 in 1988 and were down to 1 in 2025.

Collisions and casualties on the B4511, 1979 to 2025

  • Collisions
  • Collisions in 2025: 1
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202511
202422
202336
202211
202133
202000
201911
201813
201700
201623
201512
201400
201311
201200
201100
201012
200900
200800
200722
200647
200536
200449
200333
200245
200137
2000513
199945
199845
199755
199622
199535
199412
199336
199200
199100
199033
198922
198878
198711
198611
1985518
198412
198344
198235
198147
198045
1979613

When crashes happen on the B4511

Saturday has the most collisions on the B4511 (19), and 3pm to 6pm is the busiest time of day (27).

Collisions by day of the week

  • Monday18 (17%)
  • Tuesday14 (13%)
  • Wednesday9 (8.3%)
  • Thursday17 (16%)
  • Friday17 (16%)
  • Saturday19 (18%)
  • Sunday14 (13%)

Collisions by time of day

  • Midnight to 3am1 (0.9%)
  • 3am to 6am2 (1.9%)
  • 6am to 9am12 (11%)
  • 9am to noon13 (12%)
  • Noon to 3pm13 (12%)
  • 3pm to 6pm27 (25%)
  • 6pm to 9pm24 (22%)
  • 9pm to midnight16 (15%)

Collisions by month

  • January7 (6.5%)
  • February5 (4.6%)
  • March10 (9.3%)
  • April10 (9.3%)
  • May6 (5.6%)
  • June12 (11%)
  • July10 (9.3%)
  • August7 (6.5%)
  • September11 (10%)
  • October11 (10%)
  • November12 (11%)
  • December7 (6.5%)

Light conditions at the time

  • Daylight76 (70%)
  • Dark, street lights lit25 (23%)
  • Dark, no street lighting3 (2.8%)
  • Dark, lighting unknown2 (1.9%)
  • Dark, street lights unlit2 (1.9%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4511 crashes

On the B4511, 88% of collisions happened where the speed limit was 30 mph and 59% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (2.8%)
  • 30 mph95 (88%)
  • 40 mph1 (0.9%)
  • 50 mph1 (0.9%)
  • 60 mph7 (6.5%)
  • 70 mph1 (0.9%)

Weather at the time

  • Fine, no high winds73 (68%)
  • Raining, no high winds24 (22%)
  • Raining with high winds4 (3.7%)
  • Snowing, no high winds3 (2.8%)
  • Other2 (1.9%)
  • Not recorded2 (1.9%)

Road surface

  • Dry64 (59%)
  • Wet or damp40 (37%)
  • Snow2 (1.9%)
  • Flood over 3cm deep1 (0.9%)
  • Frost or ice1 (0.9%)

Type of road

  • Single carriageway96 (89%)
  • Roundabout11 (10%)
  • Dual carriageway1 (0.9%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4511 crashes

Car occupants make up 59% of the people killed or injured on the B4511, followed by pedestrians (14%).

Casualties by road user

  • Car occupant104 (59%)
  • Pedestrian25 (14%)
  • Minibus occupant15 (8.5%)
  • Motorcyclist12 (6.8%)
  • Cyclist10 (5.7%)
  • Bus or coach occupant3 (1.7%)
  • Other6 (3.4%)
  • Not recorded1 (0.6%)

Vehicles involved

  • Car146 (78%)
  • Motorcycle12 (6.4%)
  • Pedal cycle10 (5.3%)
  • Van or goods vehicle up to 3.5 tonnes8 (4.3%)
  • Bus or coach4 (2.1%)
  • Goods vehicle over 3.5 tonnes3 (1.6%)
  • Minibus2 (1.1%)
  • Other3 (1.6%)

Casualties by age

  • 0 to 56 (3.4%)
  • 6 to 106 (3.4%)
  • 11 to 1517 (9.7%)
  • 16 to 2043 (24%)
  • 21 to 2521 (12%)
  • 26 to 3527 (15%)
  • 36 to 4520 (11%)
  • 46 to 5522 (13%)
  • 56 to 656 (3.4%)
  • 66 to 754 (2.3%)
  • Over 753 (1.7%)
  • Not recorded1 (0.6%)

Drivers, passengers and pedestrians

  • Driver or rider84 (48%)
  • Passenger67 (38%)
  • Pedestrian25 (14%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4511

Map of the 25 most recent crashes on the B4511

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4511 crashes by council area

Of the 108 collisions on the B4511, 106 were in Caerphilly.

Collisions on the B4511 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stCaerphilly106174320

B4511 crashes by town

Of the 108 collisions on the B4511, 28 were in the built-up area of Aberbargoed.

Recent crashes on the B4511

These are the 25 most recent collisions on the B4511, from 27 July 2005 to 24 April 2025.

Severity