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CrashStats

B4158 accidents: crash map and statistics

Police recorded 94 collisions on the B4158 from 1987 to 2025, with 107 casualties. Of those crashes, 1 was fatal and 19 serious, and 1 person was killed.

In 2025 there were 2 collisions on the B4158, up 100% from 1 in 2024, with 3 casualties.

Collisions since 1987
94
4,094th highest of 4,923 roads
Casualties
107
1.14 per collision
Fatal collisions
1
1 person killed
Serious collisions
19
19 seriously injured
Collisions in 2025
2
Up 100% on 2024
Casualties in 2025
3
Up 200% on 2024

Crash severity on the B4158

On the B4158, 1.1% of collisions were fatal and 20% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1987 to 2025

  • Fatal11.1%
  • Serious1920%
  • Slight7479%

Where the B4158 ranks among 4,923 roads

Most collisions
4,094th
Most casualties
4,248th
Most fatal collisions
3,933rd
Most serious collisions
4,084th

B4158 accidents by year

Collisions on the B4158 peaked at 6 in 2018 and were down to 2 in 2025.

Collisions and casualties on the B4158, 1987 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202523
202411
202300
202222
202111
202000
201955
201868
201757
201600
201522
201444
201322
201234
201133
201011
200922
200822
200700
200622
200511
200433
200344
200200
200144
200055
199967
199856
199738
199633
199511
199444
199344
199222
199122
199011
198922
198800
198711

When crashes happen on the B4158

Friday has the most collisions on the B4158 (24), and 3pm to 6pm is the busiest time of day (27).

Collisions by day of the week

  • Monday18 (19%)
  • Tuesday11 (12%)
  • Wednesday13 (14%)
  • Thursday16 (17%)
  • Friday24 (26%)
  • Saturday7 (7.4%)
  • Sunday5 (5.3%)

Collisions by time of day

  • Midnight to 3am2 (2.1%)
  • 3am to 6am1 (1.1%)
  • 6am to 9am18 (19%)
  • 9am to noon12 (13%)
  • Noon to 3pm15 (16%)
  • 3pm to 6pm27 (29%)
  • 6pm to 9pm14 (15%)
  • 9pm to midnight5 (5.3%)

Collisions by month

  • January7 (7.4%)
  • February8 (8.5%)
  • March3 (3.2%)
  • April8 (8.5%)
  • May6 (6.4%)
  • June8 (8.5%)
  • July8 (8.5%)
  • August4 (4.3%)
  • September13 (14%)
  • October12 (13%)
  • November10 (11%)
  • December7 (7.4%)

Light conditions at the time

  • Daylight67 (71%)
  • Dark, street lights lit24 (26%)
  • Dark, street lights unlit2 (2.1%)
  • Dark, no street lighting1 (1.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4158 crashes

On the B4158, 85% of collisions happened where the speed limit was 30 mph and 60% on a dry road surface.

Speed limit at the scene

  • 30 mph80 (85%)
  • 40 mph10 (11%)
  • 50 mph2 (2.1%)
  • 60 mph2 (2.1%)

Weather at the time

  • Fine, no high winds69 (73%)
  • Raining, no high winds18 (19%)
  • Fog or mist3 (3.2%)
  • Raining with high winds2 (2.1%)
  • Snowing, no high winds1 (1.1%)
  • Not recorded1 (1.1%)

Road surface

  • Dry56 (60%)
  • Wet or damp34 (36%)
  • Frost or ice3 (3.2%)
  • Snow1 (1.1%)

Type of road

  • Single carriageway83 (88%)
  • Roundabout9 (9.6%)
  • Dual carriageway2 (2.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4158 crashes

Car occupants make up 53% of the people killed or injured on the B4158, followed by pedestrians (22%).

Casualties by road user

  • Car occupant57 (53%)
  • Pedestrian24 (22%)
  • Motorcyclist11 (10%)
  • Cyclist10 (9.3%)
  • Van occupant2 (1.9%)
  • Other vehicle occupant1 (0.9%)
  • Taxi or private hire car occupant1 (0.9%)
  • Not recorded1 (0.9%)

Vehicles involved

  • Car131 (77%)
  • Motorcycle12 (7.1%)
  • Pedal cycle10 (5.9%)
  • Van or goods vehicle up to 3.5 tonnes9 (5.3%)
  • Goods vehicle over 3.5 tonnes3 (1.8%)
  • Taxi or private hire car3 (1.8%)
  • Other vehicle1 (0.6%)
  • Personal powered transporter (e-scooter or similar)1 (0.6%)

Casualties by age

  • 6 to 103 (2.8%)
  • 11 to 1516 (15%)
  • 16 to 2017 (16%)
  • 21 to 2512 (11%)
  • 26 to 3526 (24%)
  • 36 to 4512 (11%)
  • 46 to 5512 (11%)
  • 56 to 654 (3.7%)
  • 66 to 752 (1.9%)
  • Over 753 (2.8%)

Drivers, passengers and pedestrians

  • Driver or rider67 (63%)
  • Pedestrian24 (22%)
  • Passenger16 (15%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4158

Map of the 25 most recent crashes on the B4158

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

  • 25 crashes
  • Serious
  • Slight

B4158 crashes by council area

Of the 94 collisions on the B4158, 91 were in Wiltshire.

Collisions on the B4158 in each area, 1987 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stWiltshire91104119

B4158 crashes by town

Of the 94 collisions on the B4158, 87 were in the built-up area of Chippenham, Wiltshire.

Recent crashes on the B4158

These are the 25 most recent collisions on the B4158, from 1 September 2014 to 21 May 2025.

Severity