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CrashStats

B4245 accidents: crash map and statistics

Police recorded 751 collisions on the B4245 from 1979 to 2025, with 1,080 casualties. Of those crashes, 18 were fatal and 157 serious, and 19 people were killed.

In 2025 there were 6 collisions on the B4245, up 100% from 3 in 2024, with 12 casualties.

Collisions since 1979
751
1,420th highest of 4,923 roads
Casualties
1,080
1.44 per collision
Fatal collisions
18
19 people killed
Serious collisions
157
200 seriously injured
Collisions in 2025
6
Up 100% on 2024
Casualties in 2025
12
Up 140% on 2024

Crash severity on the B4245

On the B4245, 2.4% of collisions were fatal and 21% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal182.4%
  • Serious15721%
  • Slight57677%

Where the B4245 ranks among 4,923 roads

Most collisions
1,420th
Most casualties
1,345th
Most fatal collisions
1,081st
Most serious collisions
1,324th

B4245 accidents by year

Collisions on the B4245 peaked at 35 in 2000 and were down to 6 in 2025.

Collisions and casualties on the B4245, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025612
202435
202357
202233
202135
2020913
20191217
201878
2017612
20161221
2015910
201448
2013811
20121012
2011917
201089
200955
20081014
20071114
200644
20051930
20042532
20033348
20022742
20011528
20003547
19993347
19981729
19972636
19963446
19952349
19941827
19932433
19921419
19911624
19902433
19891722
19882128
19872539
19862940
19852230
19842023
19831616
19821629
19811818
19802031
19792027

When crashes happen on the B4245

Thursday has the most collisions on the B4245 (144), and 3pm to 6pm is the busiest time of day (192).

Collisions by day of the week

  • Monday119 (16%)
  • Tuesday88 (12%)
  • Wednesday114 (15%)
  • Thursday144 (19%)
  • Friday106 (14%)
  • Saturday102 (14%)
  • Sunday78 (10%)

Collisions by time of day

  • Midnight to 3am26 (3.5%)
  • 3am to 6am17 (2.3%)
  • 6am to 9am98 (13%)
  • 9am to noon108 (14%)
  • Noon to 3pm125 (17%)
  • 3pm to 6pm192 (26%)
  • 6pm to 9pm105 (14%)
  • 9pm to midnight80 (11%)

Collisions by month

  • January74 (9.9%)
  • February54 (7.2%)
  • March64 (8.5%)
  • April60 (8%)
  • May63 (8.4%)
  • June51 (6.8%)
  • July71 (9.5%)
  • August55 (7.3%)
  • September70 (9.3%)
  • October63 (8.4%)
  • November68 (9.1%)
  • December58 (7.7%)

Light conditions at the time

  • Daylight541 (72%)
  • Dark, street lights lit115 (15%)
  • Dark, no street lighting81 (11%)
  • Dark, lighting unknown10 (1.3%)
  • Dark, street lights unlit4 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4245 crashes

On the B4245, 46% of collisions happened where the speed limit was 30 mph and 63% on a dry road surface.

Speed limit at the scene

  • 20 mph6 (0.8%)
  • 30 mph347 (46%)
  • 40 mph103 (14%)
  • 50 mph3 (0.4%)
  • 60 mph283 (38%)
  • 70 mph9 (1.2%)

Weather at the time

  • Fine, no high winds575 (77%)
  • Raining, no high winds105 (14%)
  • Raining with high winds11 (1.5%)
  • Fog or mist9 (1.2%)
  • Other44 (5.9%)
  • Not recorded7 (0.9%)

Road surface

  • Dry473 (63%)
  • Wet or damp246 (33%)
  • Frost or ice24 (3.2%)
  • Snow4 (0.5%)
  • Flood over 3cm deep2 (0.3%)
  • Oil or diesel2 (0.3%)

Type of road

  • Single carriageway697 (93%)
  • Roundabout39 (5.2%)
  • One way street or slip road15 (2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4245 crashes

Car occupants make up 65% of the people killed or injured on the B4245, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant697 (65%)
  • Motorcyclist152 (14%)
  • Pedestrian80 (7.4%)
  • Cyclist64 (5.9%)
  • Goods vehicle occupant (over 3.5 tonnes)24 (2.2%)
  • Van occupant23 (2.1%)
  • Bus or coach occupant20 (1.9%)
  • Other20 (1.9%)

Vehicles involved

  • Car965 (72%)
  • Motorcycle149 (11%)
  • Pedal cycle65 (4.9%)
  • Goods vehicle over 3.5 tonnes52 (3.9%)
  • Van or goods vehicle up to 3.5 tonnes48 (3.6%)
  • Other vehicle24 (1.8%)
  • Bus or coach19 (1.4%)
  • Other17 (1.3%)

Casualties by age

  • 0 to 528 (2.6%)
  • 6 to 1036 (3.3%)
  • 11 to 1561 (5.6%)
  • 16 to 20209 (19%)
  • 21 to 25186 (17%)
  • 26 to 35200 (19%)
  • 36 to 45137 (13%)
  • 46 to 5598 (9.1%)
  • 56 to 6556 (5.2%)
  • 66 to 7538 (3.5%)
  • Over 7525 (2.3%)
  • Not recorded6 (0.6%)

Drivers, passengers and pedestrians

  • Driver or rider691 (64%)
  • Passenger309 (29%)
  • Pedestrian80 (7.4%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4245

Map of the 25 most recent crashes on the B4245

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B4245 crashes by council area

Collisions on the B4245 were recorded in 2 council areas. Monmouthshire has the most, with 677, followed by Newport (68).

Collisions on the B4245 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stMonmouthshire67796914138
2ndNewport68104419

B4245 crashes by town

Collisions on the B4245 were recorded in 3 towns and built-up areas, led by Caldicot (211) and Undy and Magor (107).

Recent crashes on the B4245

These are the 25 most recent collisions on the B4245, from 18 July 2020 to 13 December 2025.

Severity