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CrashStats

B4620 accidents: crash map and statistics

Police recorded 86 collisions on the B4620 from 2000 to 2025, with 115 casualties. Of those crashes, 2 were fatal and 13 serious, and 2 people were killed.

In 2025 there were 2 collisions on the B4620, up 100% from 1 in 2024, with 2 casualties.

Collisions since 2000
86
4,173rd highest of 4,923 roads
Casualties
115
1.34 per collision
Fatal collisions
2
2 people killed
Serious collisions
13
13 seriously injured
Collisions in 2025
2
Up 100% on 2024
Casualties in 2025
2
Up 100% on 2024

Crash severity on the B4620

On the B4620, 2.3% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 2000 to 2025

  • Fatal22.3%
  • Serious1315%
  • Slight7183%

Where the B4620 ranks among 4,923 roads

Most collisions
4,173rd
Most casualties
4,187th
Most fatal collisions
3,485th
Most serious collisions
4,432nd

B4620 accidents by year

Collisions on the B4620 peaked at 7 in 2012 and were down to 2 in 2025.

Collisions and casualties on the B4620, 2000 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202411
202311
202222
202111
202023
201922
201811
201734
201644
201569
201444
201367
2012711
201158
201022
200957
200834
200722
200645
200557
200411
200357
2002611
200135
200034

When crashes happen on the B4620

Sunday has the most collisions on the B4620 (15), and noon to 3pm is the busiest time of day (19).

Collisions by day of the week

  • Monday12 (14%)
  • Tuesday9 (10%)
  • Wednesday14 (16%)
  • Thursday14 (16%)
  • Friday11 (13%)
  • Saturday11 (13%)
  • Sunday15 (17%)

Collisions by time of day

  • Midnight to 3am2 (2.3%)
  • 3am to 6am2 (2.3%)
  • 6am to 9am9 (10%)
  • 9am to noon8 (9.3%)
  • Noon to 3pm19 (22%)
  • 3pm to 6pm19 (22%)
  • 6pm to 9pm19 (22%)
  • 9pm to midnight8 (9.3%)

Collisions by month

  • January10 (12%)
  • February6 (7%)
  • March7 (8.1%)
  • April3 (3.5%)
  • May3 (3.5%)
  • June5 (5.8%)
  • July7 (8.1%)
  • August6 (7%)
  • September13 (15%)
  • October9 (10%)
  • November9 (10%)
  • December8 (9.3%)

Light conditions at the time

  • Daylight59 (69%)
  • Dark, street lights lit26 (30%)
  • Dark, street lights unlit1 (1.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4620 crashes

On the B4620, 81% of collisions happened where the speed limit was 30 mph and 73% on a dry road surface.

Speed limit at the scene

  • 20 mph4 (4.7%)
  • 30 mph70 (81%)
  • 40 mph7 (8.1%)
  • 60 mph5 (5.8%)

Weather at the time

  • Fine, no high winds67 (78%)
  • Raining, no high winds10 (12%)
  • Fine with high winds1 (1.2%)
  • Snowing, no high winds1 (1.2%)
  • Not recorded7 (8.1%)

Road surface

  • Dry63 (73%)
  • Wet or damp23 (27%)

Type of road

  • Single carriageway79 (92%)
  • Roundabout4 (4.7%)
  • Dual carriageway1 (1.2%)
  • One way street or slip road1 (1.2%)
  • Not recorded1 (1.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4620 crashes

Car occupants make up 64% of the people killed or injured on the B4620, followed by cyclists (11%).

Casualties by road user

  • Car occupant74 (64%)
  • Cyclist13 (11%)
  • Motorcyclist11 (9.6%)
  • Pedestrian9 (7.8%)
  • Taxi or private hire car occupant5 (4.3%)
  • Bus or coach occupant2 (1.7%)
  • Van occupant1 (0.9%)

Vehicles involved

  • Car130 (79%)
  • Motorcycle13 (7.9%)
  • Pedal cycle12 (7.3%)
  • Taxi or private hire car4 (2.4%)
  • Van or goods vehicle up to 3.5 tonnes4 (2.4%)
  • Bus or coach2 (1.2%)

Casualties by age

  • 0 to 51 (0.9%)
  • 11 to 154 (3.5%)
  • 16 to 2018 (16%)
  • 21 to 2518 (16%)
  • 26 to 3523 (20%)
  • 36 to 4526 (23%)
  • 46 to 559 (7.8%)
  • 56 to 658 (7%)
  • 66 to 753 (2.6%)
  • Over 755 (4.3%)

Drivers, passengers and pedestrians

  • Driver or rider82 (71%)
  • Passenger24 (21%)
  • Pedestrian9 (7.8%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4620

Map of the 25 most recent crashes on the B4620

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

  • 25 crashes
  • Serious
  • Slight

B4620 crashes by council area

Of the 86 collisions on the B4620, 85 were in Swansea.

Collisions on the B4620 in each area, 2000 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSwansea85114212

B4620 crashes by town

Collisions on the B4620 were recorded in 4 towns and built-up areas, led by Gorseinon (28) and Swansea (22).

Recent crashes on the B4620

These are the 25 most recent collisions on the B4620, from 27 March 2015 to 4 August 2025.

Severity