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CrashStats

A4109 accidents: crash map and statistics

Police recorded 521 collisions on the A4109 from 1979 to 2025, with 858 casualties. Of those crashes, 23 were fatal and 95 serious, and 25 people were killed.

In 2025 there were 2 collisions on the A4109, up 100% from 1 in 2024, with 2 casualties.

Collisions since 1979
521
1,903rd highest of 4,923 roads
Casualties
858
1.65 per collision
Fatal collisions
23
25 people killed
Serious collisions
95
138 seriously injured
Collisions in 2025
2
Up 100% on 2024
Casualties in 2025
2
Up 100% on 2024

Crash severity on the A4109

On the A4109, 4.4% of collisions were fatal and 18% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal234.4%
  • Serious9518%
  • Slight40377%

Where the A4109 ranks among 4,923 roads

Most collisions
1,903rd
Most casualties
1,625th
Most fatal collisions
870th
Most serious collisions
2,003rd

A4109 accidents by year

Collisions on the A4109 peaked at 26 in 1987 and were down to 2 in 2025.

Collisions and casualties on the A4109, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202411
202336
202212
2021611
202000
201968
201889
20171222
201666
2015911
2014614
20131524
2012812
201134
201068
2009613
2008711
20071021
2006914
20051430
20041328
20031216
20022036
20011219
20001121
199956
19981223
19971443
19961322
19951221
19941018
19931722
19921425
19912028
19901619
19892141
19881625
19872637
19861826
19851321
19841519
19831725
1982712
19811417
19801321
19792238

When crashes happen on the A4109

Saturday has the most collisions on the A4109 (93), and 3pm to 6pm is the busiest time of day (111).

Collisions by day of the week

  • Monday75 (14%)
  • Tuesday68 (13%)
  • Wednesday66 (13%)
  • Thursday55 (11%)
  • Friday81 (16%)
  • Saturday93 (18%)
  • Sunday83 (16%)

Collisions by time of day

  • Midnight to 3am30 (5.8%)
  • 3am to 6am24 (4.6%)
  • 6am to 9am58 (11%)
  • 9am to noon62 (12%)
  • Noon to 3pm84 (16%)
  • 3pm to 6pm111 (21%)
  • 6pm to 9pm87 (17%)
  • 9pm to midnight65 (12%)

Collisions by month

  • January39 (7.5%)
  • February40 (7.7%)
  • March43 (8.3%)
  • April47 (9%)
  • May48 (9.2%)
  • June50 (9.6%)
  • July54 (10%)
  • August39 (7.5%)
  • September40 (7.7%)
  • October34 (6.5%)
  • November44 (8.4%)
  • December43 (8.3%)

Light conditions at the time

  • Daylight349 (67%)
  • Dark, street lights lit83 (16%)
  • Dark, no street lighting71 (14%)
  • Dark, lighting unknown8 (1.5%)
  • Dark, street lights unlit8 (1.5%)
  • Not recorded2 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4109 crashes

On the A4109, 50% of collisions happened where the speed limit was 30 mph and 57% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (0.4%)
  • 30 mph263 (50%)
  • 40 mph35 (6.7%)
  • 50 mph2 (0.4%)
  • 60 mph217 (42%)
  • 70 mph2 (0.4%)

Weather at the time

  • Fine, no high winds375 (72%)
  • Raining, no high winds84 (16%)
  • Raining with high winds23 (4.4%)
  • Fine with high winds11 (2.1%)
  • Other18 (3.5%)
  • Not recorded10 (1.9%)

Road surface

  • Dry297 (57%)
  • Wet or damp184 (35%)
  • Frost or ice27 (5.2%)
  • Flood over 3cm deep8 (1.5%)
  • Other3 (0.6%)
  • Not recorded2 (0.4%)

Type of road

  • Single carriageway509 (98%)
  • One way street or slip road5 (1%)
  • Dual carriageway4 (0.8%)
  • Roundabout3 (0.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4109 crashes

Car occupants make up 78% of the people killed or injured on the A4109, followed by motorcyclists (5.8%).

Casualties by road user

  • Car occupant670 (78%)
  • Motorcyclist50 (5.8%)
  • Pedestrian47 (5.5%)
  • Bus or coach occupant38 (4.4%)
  • Van occupant24 (2.8%)
  • Cyclist17 (2%)
  • Goods vehicle occupant (over 3.5 tonnes)7 (0.8%)
  • Other5 (0.6%)

Vehicles involved

  • Car701 (79%)
  • Motorcycle46 (5.2%)
  • Van or goods vehicle up to 3.5 tonnes40 (4.5%)
  • Goods vehicle over 3.5 tonnes34 (3.8%)
  • Bus or coach30 (3.4%)
  • Pedal cycle17 (1.9%)
  • Other vehicle9 (1%)
  • Other10 (1.1%)

Casualties by age

  • 0 to 518 (2.1%)
  • 6 to 1022 (2.6%)
  • 11 to 1541 (4.8%)
  • 16 to 20191 (22%)
  • 21 to 25119 (14%)
  • 26 to 35162 (19%)
  • 36 to 45117 (14%)
  • 46 to 5593 (11%)
  • 56 to 6546 (5.4%)
  • 66 to 7534 (4%)
  • Over 7515 (1.7%)

Drivers, passengers and pedestrians

  • Driver or rider489 (57%)
  • Passenger322 (38%)
  • Pedestrian47 (5.5%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4109

Map of the 25 most recent crashes on the A4109

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4109 crashes by council area

Collisions on the A4109 were recorded in 2 council areas. Neath Port Talbot has the most, with 515, followed by Powys (3).

Collisions on the A4109 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stNeath Port Talbot5158512395
2ndPowys3400

A4109 crashes by town

Collisions on the A4109 were recorded in 2 towns and built-up areas, led by Glyn-neath (28) and Neath (3).

Recent crashes on the A4109

These are the 25 most recent collisions on the A4109, from 21 May 2018 to 9 July 2025.

Severity