Skip to main content
CrashStats

B5109 accidents: crash map and statistics

Police recorded 498 collisions on the B5109 from 1979 to 2025, with 664 casualties. Of those crashes, 8 were fatal and 109 serious, and 8 people were killed.

In 2025 there were 3 collisions on the B5109, level with 2024, with 3 casualties.

Collisions since 1979
498
1,978th highest of 4,923 roads
Casualties
664
1.33 per collision
Fatal collisions
8
8 people killed
Serious collisions
109
131 seriously injured
Collisions in 2025
3
Level with 2024
Casualties in 2025
3
Level with 2024

Crash severity on the B5109

On the B5109, 1.6% of collisions were fatal and 22% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal81.6%
  • Serious10922%
  • Slight38177%

Where the B5109 ranks among 4,923 roads

Most collisions
1,978th
Most casualties
1,997th
Most fatal collisions
1,937th
Most serious collisions
1,774th

B5109 accidents by year

Collisions on the B5109 peaked at 21 in 1982 and were down to 3 in 2025.

Collisions and casualties on the B5109, 1979 to 2025

  • Collisions
  • Collisions in 2025: 3
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202533
202433
202344
202225
202122
202046
201957
201868
201769
201656
201533
201489
201357
201267
201156
201066
200989
20081018
20071011
20061214
200589
2004913
20031316
20021217
20011315
20001220
19991621
19981217
19971420
19961624
19951419
19941221
19931113
19921418
19911421
19901521
19891927
19881417
19871315
19861628
19851418
19841823
19831617
19822130
19811926
19801818
19791217

When crashes happen on the B5109

Friday has the most collisions on the B5109 (91), and 3pm to 6pm is the busiest time of day (145).

Collisions by day of the week

  • Monday68 (14%)
  • Tuesday70 (14%)
  • Wednesday65 (13%)
  • Thursday78 (16%)
  • Friday91 (18%)
  • Saturday75 (15%)
  • Sunday51 (10%)

Collisions by time of day

  • Midnight to 3am23 (4.6%)
  • 3am to 6am3 (0.6%)
  • 6am to 9am43 (8.6%)
  • 9am to noon74 (15%)
  • Noon to 3pm84 (17%)
  • 3pm to 6pm145 (29%)
  • 6pm to 9pm71 (14%)
  • 9pm to midnight55 (11%)

Collisions by month

  • January36 (7.2%)
  • February48 (9.6%)
  • March37 (7.4%)
  • April35 (7%)
  • May44 (8.8%)
  • June53 (11%)
  • July40 (8%)
  • August50 (10%)
  • September41 (8.2%)
  • October41 (8.2%)
  • November31 (6.2%)
  • December42 (8.4%)

Light conditions at the time

  • Daylight361 (72%)
  • Dark, no street lighting76 (15%)
  • Dark, street lights lit52 (10%)
  • Dark, lighting unknown8 (1.6%)
  • Dark, street lights unlit1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B5109 crashes

On the B5109, 49% of collisions happened where the speed limit was 60 mph and 59% on a dry road surface.

Speed limit at the scene

  • 20 mph5 (1%)
  • 30 mph217 (44%)
  • 40 mph17 (3.4%)
  • 50 mph1 (0.2%)
  • 60 mph245 (49%)
  • 70 mph13 (2.6%)

Weather at the time

  • Fine, no high winds355 (71%)
  • Raining, no high winds76 (15%)
  • Raining with high winds20 (4%)
  • Fine with high winds15 (3%)
  • Other29 (5.8%)
  • Not recorded3 (0.6%)

Road surface

  • Dry296 (59%)
  • Wet or damp188 (38%)
  • Frost or ice7 (1.4%)
  • Flood over 3cm deep4 (0.8%)
  • Snow3 (0.6%)

Type of road

  • Single carriageway468 (94%)
  • One way street or slip road20 (4%)
  • Dual carriageway5 (1%)
  • Roundabout1 (0.2%)
  • Not recorded4 (0.8%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B5109 crashes

Car occupants make up 63% of the people killed or injured on the B5109, followed by pedestrians (16%).

Casualties by road user

  • Car occupant416 (63%)
  • Pedestrian106 (16%)
  • Motorcyclist78 (12%)
  • Cyclist33 (5%)
  • Van occupant16 (2.4%)
  • Bus or coach occupant5 (0.8%)
  • Goods vehicle occupant (over 3.5 tonnes)3 (0.5%)
  • Other7 (1.1%)

Vehicles involved

  • Car602 (75%)
  • Motorcycle76 (9.5%)
  • Pedal cycle33 (4.1%)
  • Van or goods vehicle up to 3.5 tonnes25 (3.1%)
  • Goods vehicle over 3.5 tonnes21 (2.6%)
  • Bus or coach17 (2.1%)
  • Other vehicle10 (1.3%)
  • Other14 (1.8%)

Casualties by age

  • 0 to 515 (2.3%)
  • 6 to 1031 (4.7%)
  • 11 to 1551 (7.7%)
  • 16 to 20172 (26%)
  • 21 to 2592 (14%)
  • 26 to 3596 (14%)
  • 36 to 4574 (11%)
  • 46 to 5547 (7.1%)
  • 56 to 6532 (4.8%)
  • 66 to 7533 (5%)
  • Over 7516 (2.4%)
  • Not recorded5 (0.8%)

Drivers, passengers and pedestrians

  • Driver or rider397 (60%)
  • Passenger161 (24%)
  • Pedestrian106 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B5109

Map of the 25 most recent crashes on the B5109

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

  • 25 crashes
  • Serious
  • Slight

B5109 crashes by council area

Of the 498 collisions on the B5109, 496 were in Isle of Anglesey.

Collisions on the B5109 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stIsle of Anglesey4966608108

B5109 crashes by town

Of the 498 collisions on the B5109, 139 were in the built-up area of Llangefni.

Recent crashes on the B5109

These are the 25 most recent collisions on the B5109, from 15 September 2018 to 13 September 2025.

Severity