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CrashStats

M48 accidents: crash map and statistics

Police recorded 135 collisions on the M48 from 1983 to 2025, with 185 casualties. Of those crashes, 9 were fatal and 19 serious, and 9 people were killed.

In 2025 there were 6 collisions on the M48, down 25% from 8 in 2024, with 6 casualties.

Live M48 closures, incidents and roadworks are checked every 5 minutes.

Collisions since 1983
135
3,721st highest of 4,923 roads
Casualties
185
1.37 per collision
Fatal collisions
9
9 people killed
Serious collisions
19
22 seriously injured
Collisions in 2025
6
Down 25% on 2024
Casualties in 2025
6
Down 25% on 2024

Crash severity on the M48

On the M48, 6.7% of collisions were fatal and 14% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1983 to 2025

  • Fatal96.7%
  • Serious1914%
  • Slight10779%

Where the M48 ranks among 4,923 roads

Most collisions
3,721st
Most casualties
3,706th
Most fatal collisions
1,807th
Most serious collisions
4,084th

M48 accidents by year

Collisions on the M48 peaked at 11 in 2013 and were down to 6 in 2025.

Collisions and casualties on the M48, 1983 to 2025

  • Collisions
  • Collisions in 2025: 6
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202566
202488
202344
202233
202177
202023
201911
201825
201756
201667
201536
201445
20131115
201244
201136
201024
200935
200833
200744
200611
200559
200434
200379
200257
20011119
20001119
199933
199834
199700
199647
199500
199400
199300
199200
199100
199000
198900
198800
198700
198600
198500
198400
198311

When crashes happen on the M48

Monday has the most collisions on the M48 (27), and 3pm to 6pm is the busiest time of day (30).

Collisions by day of the week

  • Monday27 (20%)
  • Tuesday17 (13%)
  • Wednesday15 (11%)
  • Thursday21 (16%)
  • Friday23 (17%)
  • Saturday17 (13%)
  • Sunday15 (11%)

Collisions by time of day

  • Midnight to 3am7 (5.2%)
  • 3am to 6am6 (4.4%)
  • 6am to 9am18 (13%)
  • 9am to noon22 (16%)
  • Noon to 3pm19 (14%)
  • 3pm to 6pm30 (22%)
  • 6pm to 9pm19 (14%)
  • 9pm to midnight14 (10%)

Collisions by month

  • January11 (8.1%)
  • February12 (8.9%)
  • March6 (4.4%)
  • April4 (3%)
  • May20 (15%)
  • June7 (5.2%)
  • July18 (13%)
  • August10 (7.4%)
  • September14 (10%)
  • October9 (6.7%)
  • November12 (8.9%)
  • December12 (8.9%)

Light conditions at the time

  • Daylight95 (70%)
  • Dark, no street lighting24 (18%)
  • Dark, street lights lit12 (8.9%)
  • Dark, lighting unknown4 (3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in M48 crashes

On the M48, 79% of collisions happened where the speed limit was 70 mph and 70% on a dry road surface.

Speed limit at the scene

  • 30 mph8 (5.9%)
  • 40 mph6 (4.4%)
  • 50 mph12 (8.9%)
  • 60 mph2 (1.5%)
  • 70 mph107 (79%)

Weather at the time

  • Fine, no high winds101 (75%)
  • Raining, no high winds18 (13%)
  • Raining with high winds7 (5.2%)
  • Fine with high winds5 (3.7%)
  • Other2 (1.5%)
  • Not recorded2 (1.5%)

Road surface

  • Dry94 (70%)
  • Wet or damp36 (27%)
  • Flood over 3cm deep3 (2.2%)
  • Frost or ice2 (1.5%)

Type of road

  • Dual carriageway110 (81%)
  • One way street or slip road11 (8.1%)
  • Roundabout11 (8.1%)
  • Single carriageway3 (2.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in M48 crashes

Car occupants make up 75% of the people killed or injured on the M48, followed by motorcyclists (14%).

Casualties by road user

  • Car occupant139 (75%)
  • Motorcyclist25 (14%)
  • Pedestrian9 (4.9%)
  • Van occupant6 (3.2%)
  • Goods vehicle occupant (over 3.5 tonnes)5 (2.7%)
  • Cyclist1 (0.5%)

Vehicles involved

  • Car170 (75%)
  • Motorcycle25 (11%)
  • Goods vehicle over 3.5 tonnes17 (7.5%)
  • Van or goods vehicle up to 3.5 tonnes13 (5.7%)
  • Other vehicle1 (0.4%)
  • Pedal cycle1 (0.4%)

Casualties by age

  • 0 to 51 (0.5%)
  • 6 to 104 (2.2%)
  • 11 to 151 (0.5%)
  • 16 to 2024 (13%)
  • 21 to 2523 (12%)
  • 26 to 3546 (25%)
  • 36 to 4527 (15%)
  • 46 to 5537 (20%)
  • 56 to 6516 (8.6%)
  • 66 to 754 (2.2%)
  • Over 752 (1.1%)

Drivers, passengers and pedestrians

  • Driver or rider131 (71%)
  • Passenger45 (24%)
  • Pedestrian9 (4.9%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the M48

Map of the 25 most recent crashes on the M48

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

M48 crashes by council area

Collisions on the M48 were recorded in 2 council areas. Monmouthshire has the most, with 72, followed by South Gloucestershire (56).

Collisions on the M48 in each area, 1983 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stMonmouthshire7293610
2ndSouth Gloucestershire568338

Recent crashes on the M48

These are the 25 most recent collisions on the M48, from 20 August 2021 to 1 November 2025.

Severity