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CrashStats

A4118 accidents: crash map and statistics

Police recorded 1,942 collisions on the A4118 from 1979 to 2025, with 2,696 casualties. Of those crashes, 31 were fatal and 234 serious, and 33 people were killed.

In 2025 there were 7 collisions on the A4118, down 30% from 10 in 2024, with 7 casualties.

Collisions since 1979
1,942
594th highest of 4,923 roads
Casualties
2,696
1.39 per collision
Fatal collisions
31
33 people killed
Serious collisions
234
274 seriously injured
Collisions in 2025
7
Down 30% on 2024
Casualties in 2025
7
Down 42% on 2024

Crash severity on the A4118

On the A4118, 1.6% of collisions were fatal and 12% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal311.6%
  • Serious23412%
  • Slight1,67786%

Where the A4118 ranks among 4,923 roads

Most collisions
594th
Most casualties
588th
Most fatal collisions
662nd
Most serious collisions
912th

A4118 accidents by year

Collisions on the A4118 peaked at 91 in 1989 and were down to 7 in 2025.

Collisions and casualties on the A4118, 1979 to 2025

  • Collisions
  • Collisions in 2025: 7
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202577
20241012
20231517
2022912
202157
20201214
20192327
20181726
20172131
20162533
20153653
20144357
20133950
20123749
20113962
20103341
20093141
20083452
20073759
20065896
20055073
20044061
20034262
20024863
20013343
20005178
1999916
19982638
19971826
19961725
19954771
19945265
199374112
199265123
19917597
199084110
198991110
19886484
19876378
19867083
19855266
19845070
19834260
19826592
19816690
19806783
19795071

When crashes happen on the A4118

Friday has the most collisions on the A4118 (320), and 3pm to 6pm is the busiest time of day (501).

Collisions by day of the week

  • Monday268 (14%)
  • Tuesday258 (13%)
  • Wednesday269 (14%)
  • Thursday290 (15%)
  • Friday320 (16%)
  • Saturday299 (15%)
  • Sunday238 (12%)

Collisions by time of day

  • Midnight to 3am115 (5.9%)
  • 3am to 6am40 (2.1%)
  • 6am to 9am150 (7.7%)
  • 9am to noon233 (12%)
  • Noon to 3pm336 (17%)
  • 3pm to 6pm501 (26%)
  • 6pm to 9pm317 (16%)
  • 9pm to midnight250 (13%)

Collisions by month

  • January145 (7.5%)
  • February150 (7.7%)
  • March168 (8.7%)
  • April145 (7.5%)
  • May177 (9.1%)
  • June155 (8%)
  • July184 (9.5%)
  • August173 (8.9%)
  • September168 (8.7%)
  • October152 (7.8%)
  • November160 (8.2%)
  • December165 (8.5%)

Light conditions at the time

  • Daylight1,289 (66%)
  • Dark, street lights lit451 (23%)
  • Dark, no street lighting134 (6.9%)
  • Dark, street lights unlit35 (1.8%)
  • Dark, lighting unknown22 (1.1%)
  • Not recorded11 (0.6%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4118 crashes

On the A4118, 81% of collisions happened where the speed limit was 30 mph and 67% on a dry road surface.

Speed limit at the scene

  • 20 mph12 (0.6%)
  • 30 mph1,565 (81%)
  • 40 mph94 (4.8%)
  • 50 mph5 (0.3%)
  • 60 mph266 (14%)

Weather at the time

  • Fine, no high winds1,488 (77%)
  • Raining, no high winds293 (15%)
  • Raining with high winds46 (2.4%)
  • Fine with high winds29 (1.5%)
  • Other24 (1.2%)
  • Not recorded62 (3.2%)

Road surface

  • Dry1,300 (67%)
  • Wet or damp597 (31%)
  • Frost or ice28 (1.4%)
  • Flood over 3cm deep4 (0.2%)
  • Snow2 (0.1%)
  • Not recorded11 (0.6%)

Type of road

  • Single carriageway1,648 (85%)
  • Dual carriageway237 (12%)
  • Roundabout24 (1.2%)
  • One way street or slip road22 (1.1%)
  • Not recorded11 (0.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4118 crashes

Car occupants make up 62% of the people killed or injured on the A4118, followed by pedestrians (15%).

Casualties by road user

  • Car occupant1,678 (62%)
  • Pedestrian391 (15%)
  • Motorcyclist292 (11%)
  • Cyclist127 (4.7%)
  • Bus or coach occupant87 (3.2%)
  • Taxi or private hire car occupant52 (1.9%)
  • Van occupant42 (1.6%)
  • Other27 (1%)

Vehicles involved

  • Car2,703 (78%)
  • Motorcycle297 (8.5%)
  • Pedal cycle132 (3.8%)
  • Van or goods vehicle up to 3.5 tonnes127 (3.6%)
  • Taxi or private hire car77 (2.2%)
  • Bus or coach64 (1.8%)
  • Other70 (2%)
  • Not recorded10 (0.3%)

Casualties by age

  • 0 to 539 (1.4%)
  • 6 to 1054 (2%)
  • 11 to 15142 (5.3%)
  • 16 to 20655 (24%)
  • 21 to 25400 (15%)
  • 26 to 35427 (16%)
  • 36 to 45329 (12%)
  • 46 to 55248 (9.2%)
  • 56 to 65185 (6.9%)
  • 66 to 75118 (4.4%)
  • Over 7594 (3.5%)
  • Not recorded5 (0.2%)

Drivers, passengers and pedestrians

  • Driver or rider1,425 (53%)
  • Passenger880 (33%)
  • Pedestrian391 (15%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4118

Map of the 25 most recent crashes on the A4118

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

  • 25 crashes
  • Serious
  • Slight

A4118 crashes by council area

Collisions on the A4118 were recorded in 2 council areas. Swansea has the most, with 1,934, followed by Carmarthenshire (3).

Collisions on the A4118 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSwansea1,9342,68330233
2ndCarmarthenshire3500

A4118 crashes by town

Collisions on the A4118 were recorded in 2 towns and built-up areas, led by Swansea (1,346) and Bishopston (4).

Recent crashes on the A4118

These are the 25 most recent collisions on the A4118, from 29 May 2023 to 21 August 2025.

Severity