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CrashStats

B3157 accidents: crash map and statistics

Police recorded 1,657 collisions on the B3157 from 1979 to 2025, with 2,362 casualties. Of those crashes, 43 were fatal and 356 serious, and 49 people were killed.

In 2025 there were 15 collisions on the B3157, down 25% from 20 in 2024, with 18 casualties.

Collisions since 1979
1,657
685th highest of 4,923 roads
Casualties
2,362
1.43 per collision
Fatal collisions
43
49 people killed
Serious collisions
356
453 seriously injured
Collisions in 2025
15
Down 25% on 2024
Casualties in 2025
18
Down 25% on 2024

Crash severity on the B3157

On the B3157, 2.6% of collisions were fatal and 21% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal432.6%
  • Serious35621%
  • Slight1,25876%

Where the B3157 ranks among 4,923 roads

Most collisions
685th
Most casualties
652nd
Most fatal collisions
488th
Most serious collisions
607th

B3157 accidents by year

Collisions on the B3157 peaked at 66 in 1984 and were down to 15 in 2025.

Collisions and casualties on the B3157, 1979 to 2025

  • Collisions
  • Collisions in 2025: 15
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20251518
20242024
20231925
2022910
20211821
20201328
20191416
20181317
20171416
20162026
20151619
20141519
20132022
20122431
20113148
20102844
20092538
20082845
20073349
20062636
20053656
20044671
20034564
20024054
20013751
20005480
19994570
19984586
19973646
19965485
19954769
19943757
19934467
19925682
19913858
19904971
19893966
19884563
19874152
19864350
19855369
19846683
19833849
19824046
19816695
19805993
19795777

When crashes happen on the B3157

Friday has the most collisions on the B3157 (275), and 3pm to 6pm is the busiest time of day (419).

Collisions by day of the week

  • Monday233 (14%)
  • Tuesday235 (14%)
  • Wednesday220 (13%)
  • Thursday233 (14%)
  • Friday275 (17%)
  • Saturday255 (15%)
  • Sunday206 (12%)

Collisions by time of day

  • Midnight to 3am55 (3.3%)
  • 3am to 6am21 (1.3%)
  • 6am to 9am213 (13%)
  • 9am to noon240 (14%)
  • Noon to 3pm308 (19%)
  • 3pm to 6pm419 (25%)
  • 6pm to 9pm269 (16%)
  • 9pm to midnight132 (8%)

Collisions by month

  • January105 (6.3%)
  • February98 (5.9%)
  • March117 (7.1%)
  • April139 (8.4%)
  • May136 (8.2%)
  • June147 (8.9%)
  • July151 (9.1%)
  • August185 (11%)
  • September155 (9.4%)
  • October144 (8.7%)
  • November137 (8.3%)
  • December143 (8.6%)

Light conditions at the time

  • Daylight1,265 (76%)
  • Dark, street lights lit201 (12%)
  • Dark, no street lighting124 (7.5%)
  • Dark, street lights unlit60 (3.6%)
  • Dark, lighting unknown7 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B3157 crashes

On the B3157, 54% of collisions happened where the speed limit was 30 mph and 68% on a dry road surface.

Speed limit at the scene

  • 20 mph3 (0.2%)
  • 30 mph898 (54%)
  • 40 mph120 (7.2%)
  • 50 mph175 (11%)
  • 60 mph459 (28%)
  • 70 mph2 (0.1%)

Weather at the time

  • Fine, no high winds1,338 (81%)
  • Raining, no high winds201 (12%)
  • Fog or mist32 (1.9%)
  • Fine with high winds28 (1.7%)
  • Other49 (3%)
  • Not recorded9 (0.5%)

Road surface

  • Dry1,119 (68%)
  • Wet or damp509 (31%)
  • Frost or ice22 (1.3%)
  • Snow4 (0.2%)
  • Flood over 3cm deep3 (0.2%)

Type of road

  • Single carriageway1,605 (97%)
  • Roundabout43 (2.6%)
  • One way street or slip road5 (0.3%)
  • Dual carriageway3 (0.2%)
  • Not recorded1 (0.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B3157 crashes

Car occupants make up 58% of the people killed or injured on the B3157, followed by motorcyclists (18%).

Casualties by road user

  • Car occupant1,365 (58%)
  • Motorcyclist432 (18%)
  • Pedestrian224 (9.5%)
  • Cyclist209 (8.8%)
  • Van occupant53 (2.2%)
  • Bus or coach occupant21 (0.9%)
  • Other vehicle occupant20 (0.8%)
  • Other38 (1.6%)

Vehicles involved

  • Car2,023 (67%)
  • Motorcycle441 (15%)
  • Pedal cycle220 (7.3%)
  • Van or goods vehicle up to 3.5 tonnes140 (4.7%)
  • Goods vehicle over 3.5 tonnes64 (2.1%)
  • Other vehicle37 (1.2%)
  • Bus or coach28 (0.9%)
  • Other49 (1.6%)

Casualties by age

  • 0 to 549 (2.1%)
  • 6 to 1075 (3.2%)
  • 11 to 15172 (7.3%)
  • 16 to 20547 (23%)
  • 21 to 25289 (12%)
  • 26 to 35355 (15%)
  • 36 to 45286 (12%)
  • 46 to 55195 (8.3%)
  • 56 to 65180 (7.6%)
  • 66 to 75125 (5.3%)
  • Over 7584 (3.6%)
  • Not recorded5 (0.2%)

Drivers, passengers and pedestrians

  • Driver or rider1,472 (62%)
  • Passenger666 (28%)
  • Pedestrian224 (9.5%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B3157

Map of the 25 most recent crashes on the B3157

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B3157 crashes by council area

Collisions on the B3157 were recorded in 2 council areas. Dorset has the most, with 1,649, followed by Somerset (5).

Collisions on the B3157 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stDorset1,6492,35243356
2ndSomerset5700

B3157 crashes by town

Collisions on the B3157 were recorded in 4 towns and built-up areas, led by Weymouth (548) and Bridport (211).

Recent crashes on the B3157

These are the 25 most recent collisions on the B3157, from 10 June 2024 to 19 December 2025.

Severity