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CrashStats

B4501 accidents: crash map and statistics

Police recorded 139 collisions on the B4501 from 1979 to 2025, with 214 casualties. Of those crashes, 5 were fatal and 41 serious, and 5 people were killed.

In 2025 there were 2 collisions on the B4501, up 100% from 1 in 2024, with 2 casualties.

Collisions since 1979
139
3,682nd highest of 4,923 roads
Casualties
214
1.54 per collision
Fatal collisions
5
5 people killed
Serious collisions
41
44 seriously injured
Collisions in 2025
2
Up 100% on 2024
Casualties in 2025
2
Level with 2024

Crash severity on the B4501

On the B4501, 3.6% of collisions were fatal and 29% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal53.6%
  • Serious4129%
  • Slight9367%

Where the B4501 ranks among 4,923 roads

Most collisions
3,682nd
Most casualties
3,532nd
Most fatal collisions
2,545th
Most serious collisions
3,235th

B4501 accidents by year

Collisions on the B4501 peaked at 8 in 2010 and were down to 2 in 2025.

Collisions and casualties on the B4501, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202412
202300
202211
202169
202000
201938
201812
201735
201611
2015613
201412
201322
201233
201146
201088
200924
200833
200746
200600
200533
200439
200333
200223
200112
200055
199946
199812
199713
199637
199544
199444
199345
199257
199137
199038
198948
198833
198746
198600
198533
198435
198345
1982510
1981410
198022
197977

When crashes happen on the B4501

Sunday has the most collisions on the B4501 (30), and noon to 3pm is the busiest time of day (37).

Collisions by day of the week

  • Monday21 (15%)
  • Tuesday16 (12%)
  • Wednesday20 (14%)
  • Thursday15 (11%)
  • Friday15 (11%)
  • Saturday22 (16%)
  • Sunday30 (22%)

Collisions by time of day

  • Midnight to 3am10 (7.2%)
  • 3am to 6am1 (0.7%)
  • 6am to 9am10 (7.2%)
  • 9am to noon24 (17%)
  • Noon to 3pm37 (27%)
  • 3pm to 6pm34 (24%)
  • 6pm to 9pm14 (10%)
  • 9pm to midnight9 (6.5%)

Collisions by month

  • January8 (5.8%)
  • February4 (2.9%)
  • March9 (6.5%)
  • April11 (7.9%)
  • May15 (11%)
  • June14 (10%)
  • July17 (12%)
  • August16 (12%)
  • September12 (8.6%)
  • October13 (9.4%)
  • November12 (8.6%)
  • December8 (5.8%)

Light conditions at the time

  • Daylight113 (81%)
  • Dark, no street lighting19 (14%)
  • Dark, street lights lit6 (4.3%)
  • Dark, lighting unknown1 (0.7%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4501 crashes

On the B4501, 76% of collisions happened where the speed limit was 60 mph and 59% on a dry road surface.

Speed limit at the scene

  • 30 mph27 (19%)
  • 40 mph1 (0.7%)
  • 60 mph106 (76%)
  • 70 mph5 (3.6%)

Weather at the time

  • Fine, no high winds96 (69%)
  • Raining, no high winds22 (16%)
  • Snowing, no high winds6 (4.3%)
  • Raining with high winds3 (2.2%)
  • Snowing with high winds2 (1.4%)
  • Other10 (7.2%)

Road surface

  • Dry82 (59%)
  • Wet or damp47 (34%)
  • Snow7 (5%)
  • Frost or ice3 (2.2%)

Type of road

  • Single carriageway131 (94%)
  • One way street or slip road6 (4.3%)
  • Dual carriageway1 (0.7%)
  • Roundabout1 (0.7%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4501 crashes

Car occupants make up 68% of the people killed or injured on the B4501, followed by motorcyclists (19%).

Casualties by road user

  • Car occupant145 (68%)
  • Motorcyclist40 (19%)
  • Pedestrian11 (5.1%)
  • Goods vehicle occupant (over 3.5 tonnes)7 (3.3%)
  • Van occupant5 (2.3%)
  • Bus or coach occupant4 (1.9%)
  • Cyclist2 (0.9%)

Vehicles involved

  • Car152 (68%)
  • Motorcycle43 (19%)
  • Goods vehicle over 3.5 tonnes13 (5.8%)
  • Van or goods vehicle up to 3.5 tonnes5 (2.2%)
  • Bus or coach4 (1.8%)
  • Agricultural vehicle3 (1.3%)
  • Other vehicle2 (0.9%)
  • Other3 (1.3%)

Casualties by age

  • 0 to 52 (0.9%)
  • 6 to 103 (1.4%)
  • 11 to 1511 (5.1%)
  • 16 to 2048 (22%)
  • 21 to 2535 (16%)
  • 26 to 3538 (18%)
  • 36 to 4537 (17%)
  • 46 to 5511 (5.1%)
  • 56 to 6518 (8.4%)
  • 66 to 756 (2.8%)
  • Over 755 (2.3%)

Drivers, passengers and pedestrians

  • Driver or rider130 (61%)
  • Passenger73 (34%)
  • Pedestrian11 (5.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4501

Map of the 25 most recent crashes on the B4501

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4501 crashes by council area

Collisions on the B4501 were recorded in 3 council areas. Conwy has the most, with 67, followed by Denbighshire (46) and Gwynedd (26).

Collisions on the B4501 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stConwy67110422
2ndDenbighshire4668116
3rdGwynedd263603

B4501 crashes by town

Of the 139 collisions on the B4501, 13 were in the built-up area of Denbigh.

Recent crashes on the B4501

These are the 25 most recent collisions on the B4501, from 27 October 2014 to 2 June 2025.

Severity