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CrashStats

B4042 accidents: crash map and statistics

Police recorded 512 collisions on the B4042 from 1979 to 2025, with 737 casualties. Of those crashes, 10 were fatal and 118 serious, and 10 people were killed.

In 2025 there were 5 collisions on the B4042, up 25% from 4 in 2024, with 7 casualties.

Collisions since 1979
512
1,930th highest of 4,923 roads
Casualties
737
1.44 per collision
Fatal collisions
10
10 people killed
Serious collisions
118
139 seriously injured
Collisions in 2025
5
Up 25% on 2024
Casualties in 2025
7
Down 13% on 2024

Crash severity on the B4042

On the B4042, 2% of collisions were fatal and 23% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal102%
  • Serious11823%
  • Slight38475%

Where the B4042 ranks among 4,923 roads

Most collisions
1,930th
Most casualties
1,845th
Most fatal collisions
1,701st
Most serious collisions
1,673rd

B4042 accidents by year

Collisions on the B4042 peaked at 22 in 1992 and were down to 5 in 2025.

Collisions and casualties on the B4042, 1979 to 2025

  • Collisions
  • Collisions in 2025: 5
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202557
202448
2023715
20221114
202157
202034
201944
2018911
20171113
20161319
2015714
20141012
2013712
201248
201156
201046
2009712
200857
200768
2006818
20051927
20041922
20031620
20021722
2001912
2000916
19991619
19981215
19971015
19961014
1995915
19941421
19931012
19922241
19911518
19902028
1989815
1988913
19871419
19861925
1985913
19841421
19831216
19822131
19811723
19801425
19791314

When crashes happen on the B4042

Thursday has the most collisions on the B4042 (85), and 3pm to 6pm is the busiest time of day (98).

Collisions by day of the week

  • Monday81 (16%)
  • Tuesday79 (15%)
  • Wednesday64 (13%)
  • Thursday85 (17%)
  • Friday73 (14%)
  • Saturday66 (13%)
  • Sunday64 (13%)

Collisions by time of day

  • Midnight to 3am18 (3.5%)
  • 3am to 6am10 (2%)
  • 6am to 9am89 (17%)
  • 9am to noon75 (15%)
  • Noon to 3pm77 (15%)
  • 3pm to 6pm98 (19%)
  • 6pm to 9pm91 (18%)
  • 9pm to midnight54 (11%)

Collisions by month

  • January41 (8%)
  • February35 (6.8%)
  • March41 (8%)
  • April28 (5.5%)
  • May36 (7%)
  • June62 (12%)
  • July44 (8.6%)
  • August39 (7.6%)
  • September41 (8%)
  • October47 (9.2%)
  • November45 (8.8%)
  • December53 (10%)

Light conditions at the time

  • Daylight357 (70%)
  • Dark, no street lighting133 (26%)
  • Dark, street lights lit20 (3.9%)
  • Dark, lighting unknown1 (0.2%)
  • Dark, street lights unlit1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4042 crashes

On the B4042, 63% of collisions happened where the speed limit was 60 mph and 57% on a dry road surface.

Speed limit at the scene

  • 20 mph2 (0.4%)
  • 30 mph57 (11%)
  • 40 mph56 (11%)
  • 50 mph55 (11%)
  • 60 mph324 (63%)
  • 70 mph18 (3.5%)

Weather at the time

  • Fine, no high winds374 (73%)
  • Raining, no high winds85 (17%)
  • Fog or mist17 (3.3%)
  • Raining with high winds16 (3.1%)
  • Other16 (3.1%)
  • Not recorded4 (0.8%)

Road surface

  • Dry292 (57%)
  • Wet or damp188 (37%)
  • Frost or ice24 (4.7%)
  • Flood over 3cm deep5 (1%)
  • Snow2 (0.4%)
  • Mud1 (0.2%)

Type of road

  • Single carriageway490 (96%)
  • One way street or slip road9 (1.8%)
  • Roundabout9 (1.8%)
  • Dual carriageway4 (0.8%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4042 crashes

Car occupants make up 71% of the people killed or injured on the B4042, followed by motorcyclists (13%).

Casualties by road user

  • Car occupant524 (71%)
  • Motorcyclist95 (13%)
  • Van occupant40 (5.4%)
  • Pedestrian31 (4.2%)
  • Cyclist25 (3.4%)
  • Goods vehicle occupant (over 3.5 tonnes)9 (1.2%)
  • Bus or coach occupant6 (0.8%)
  • Other7 (0.9%)

Vehicles involved

  • Car670 (70%)
  • Motorcycle95 (10%)
  • Van or goods vehicle up to 3.5 tonnes89 (9.3%)
  • Goods vehicle over 3.5 tonnes37 (3.9%)
  • Pedal cycle30 (3.1%)
  • Other vehicle19 (2%)
  • Bus or coach4 (0.4%)
  • Other9 (0.9%)

Casualties by age

  • 0 to 59 (1.2%)
  • 6 to 1015 (2%)
  • 11 to 1515 (2%)
  • 16 to 20174 (24%)
  • 21 to 25114 (15%)
  • 26 to 35124 (17%)
  • 36 to 45103 (14%)
  • 46 to 5582 (11%)
  • 56 to 6563 (8.5%)
  • 66 to 7522 (3%)
  • Over 7516 (2.2%)

Drivers, passengers and pedestrians

  • Driver or rider552 (75%)
  • Passenger154 (21%)
  • Pedestrian31 (4.2%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4042

Map of the 25 most recent crashes on the B4042

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

  • 25 crashes
  • Serious
  • Slight

B4042 crashes by council area

Of the 512 collisions on the B4042, 511 were in Wiltshire.

Collisions on the B4042 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWiltshire51173310118

B4042 crashes by town

Collisions on the B4042 were recorded in 2 towns and built-up areas, led by Malmesbury (48) and Royal Wootton Bassett (10).

Recent crashes on the B4042

These are the 25 most recent collisions on the B4042, from 16 March 2022 to 25 November 2025.

Severity