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CrashStats

B4 accidents: crash map and statistics

Police recorded 56 collisions on the B4 from 1982 to 2022, with 84 casualties. Of those crashes, 6 were fatal and 10 serious, and 7 people were killed.

The last recorded collision on the B4 was on 1 October 2022.

Collisions since 1982
56
4,521st highest of 4,923 roads
Casualties
84
1.50 per collision
Fatal collisions
6
7 people killed
Serious collisions
10
13 seriously injured
Last recorded collision
1 Oct 2022
Busiest year
2017
33 collisions

Crash severity on the B4

On the B4, 11% of collisions were fatal and 18% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1982 to 2022

  • Fatal611%
  • Serious1018%
  • Slight4071%

Where the B4 ranks among 4,923 roads

Most collisions
4,521st
Most casualties
4,443rd
Most fatal collisions
2,299th
Most serious collisions
4,617th

B4 accidents by year

Collisions on the B4 peaked at 33 in 2017, and none have been recorded since 2022.

Collisions and casualties on the B4, 1982 to 2022

  • Collisions
  • Collisions in 2022: 1
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202211
202111
202000
201900
201800
20173348
2016612
201533
201400
201300
201200
201100
201000
200900
200800
200711
200611
200500
200411
200312
200200
200100
200000
199900
199800
199700
199614
199522
199400
199300
199200
199111
199000
198900
198800
198700
198600
198500
198400
198300
198247

When crashes happen on the B4

Friday has the most collisions on the B4 (12), and 3pm to 6pm is the busiest time of day (12).

Collisions by day of the week

  • Monday2 (3.6%)
  • Tuesday10 (18%)
  • Wednesday9 (16%)
  • Thursday7 (13%)
  • Friday12 (21%)
  • Saturday9 (16%)
  • Sunday7 (13%)

Collisions by time of day

  • Midnight to 3am3 (5.4%)
  • 3am to 6am1 (1.8%)
  • 6am to 9am7 (13%)
  • 9am to noon7 (13%)
  • Noon to 3pm11 (20%)
  • 3pm to 6pm12 (21%)
  • 6pm to 9pm10 (18%)
  • 9pm to midnight5 (8.9%)

Collisions by month

  • January4 (7.1%)
  • February6 (11%)
  • March7 (13%)
  • April3 (5.4%)
  • May1 (1.8%)
  • June4 (7.1%)
  • July1 (1.8%)
  • August4 (7.1%)
  • September9 (16%)
  • October12 (21%)
  • November5 (8.9%)

Light conditions at the time

  • Daylight41 (73%)
  • Dark, street lights lit11 (20%)
  • Dark, no street lighting3 (5.4%)
  • Dark, street lights unlit1 (1.8%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4 crashes

On the B4, 73% of collisions happened where the speed limit was 30 mph and 64% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (3.6%)
  • 30 mph41 (73%)
  • 40 mph3 (5.4%)
  • 50 mph1 (1.8%)
  • 60 mph7 (13%)
  • 70 mph2 (3.6%)

Weather at the time

  • Fine, no high winds44 (79%)
  • Raining, no high winds9 (16%)
  • Raining with high winds1 (1.8%)
  • Other1 (1.8%)
  • Not recorded1 (1.8%)

Road surface

  • Dry36 (64%)
  • Wet or damp19 (34%)
  • Flood over 3cm deep1 (1.8%)

Type of road

  • Single carriageway45 (80%)
  • Roundabout6 (11%)
  • Dual carriageway3 (5.4%)
  • One way street or slip road2 (3.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4 crashes

Car occupants make up 61% of the people killed or injured on the B4, followed by pedestrians (12%).

Casualties by road user

  • Car occupant51 (61%)
  • Pedestrian10 (12%)
  • Motorcyclist6 (7.1%)
  • Cyclist5 (6%)
  • Bus or coach occupant4 (4.8%)
  • Goods vehicle occupant (over 3.5 tonnes)4 (4.8%)
  • Taxi or private hire car occupant3 (3.6%)
  • Van occupant1 (1.2%)

Vehicles involved

  • Car76 (71%)
  • Van or goods vehicle up to 3.5 tonnes9 (8.4%)
  • Motorcycle7 (6.5%)
  • Pedal cycle5 (4.7%)
  • Goods vehicle over 3.5 tonnes4 (3.7%)
  • Bus or coach3 (2.8%)
  • Taxi or private hire car3 (2.8%)

Casualties by age

  • 0 to 51 (1.2%)
  • 6 to 104 (4.8%)
  • 11 to 152 (2.4%)
  • 16 to 2010 (12%)
  • 21 to 2516 (19%)
  • 26 to 3515 (18%)
  • 36 to 4511 (13%)
  • 46 to 556 (7.1%)
  • 56 to 656 (7.1%)
  • 66 to 755 (6%)
  • Over 758 (9.5%)

Drivers, passengers and pedestrians

  • Driver or rider50 (60%)
  • Passenger24 (29%)
  • Pedestrian10 (12%)

Source: Department for Transport, STATS19 road safety data

Map of the latest recorded crashes on the B4

Map of the 25 latest recorded crashes on the B4

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4 crashes by council area

Collisions on the B4 were recorded in 4 council areas. Newport has the most, with 19, followed by Caerphilly (15) and Kensington and Chelsea (3).

Collisions on the B4 in each area, 1982 to 2022
RankAreaCollisionsCasualtiesFatalSerious
1stNewport192621
2ndCaerphilly152103
3rdKensington and Chelsea3302
4thMonmouthshire3610

B4 crashes by town

Collisions on the B4 were recorded in 4 towns and built-up areas, led by Newport, Newport (15) and Caerphilly (3).

Latest recorded crashes on the B4

These are the 25 latest recorded collisions on the B4, from 5 June 2017 to 1 October 2022.

Severity