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CrashStats

B458 accidents: crash map and statistics

Police recorded 176 collisions on the B458 from 1979 to 2025, with 204 casualties. Of those crashes, 2 were fatal and 26 serious, and 2 people were killed.

In 2025 there were 2 collisions on the B458, up from none in 2024, with 2 casualties.

Collisions since 1979
176
3,404th highest of 4,923 roads
Casualties
204
1.16 per collision
Fatal collisions
2
2 people killed
Serious collisions
26
26 seriously injured
Collisions in 2025
2
Up from none in 2024
Casualties in 2025
2
Up from none in 2024

Crash severity on the B458

On the B458, 1.1% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal21.1%
  • Serious2615%
  • Slight14884%

Where the B458 ranks among 4,923 roads

Most collisions
3,404th
Most casualties
3,593rd
Most fatal collisions
3,485th
Most serious collisions
3,773rd

B458 accidents by year

Collisions on the B458 peaked at 12 in 1987 and were down to 2 in 2025.

Collisions and casualties on the B458, 1979 to 2025

  • Collisions
  • Collisions in 2025: 2
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202522
202400
202300
202222
202111
202011
201944
201844
201700
201600
201500
2014710
201333
201233
201166
201011
200922
200822
200711
200634
200522
200422
200389
200256
200177
200055
199911
199823
1997911
199622
199589
199422
199366
199245
199144
199099
198999
198856
19871213
19861014
19851013
1984711
198314
198223
198100
198011
197911

When crashes happen on the B458

Tuesday has the most collisions on the B458 (33), and 3pm to 6pm is the busiest time of day (52).

Collisions by day of the week

  • Monday23 (13%)
  • Tuesday33 (19%)
  • Wednesday23 (13%)
  • Thursday30 (17%)
  • Friday30 (17%)
  • Saturday30 (17%)
  • Sunday7 (4%)

Collisions by time of day

  • Midnight to 3am2 (1.1%)
  • 3am to 6am2 (1.1%)
  • 6am to 9am7 (4%)
  • 9am to noon34 (19%)
  • Noon to 3pm42 (24%)
  • 3pm to 6pm52 (30%)
  • 6pm to 9pm23 (13%)
  • 9pm to midnight14 (8%)

Collisions by month

  • January9 (5.1%)
  • February11 (6.3%)
  • March11 (6.3%)
  • April15 (8.5%)
  • May12 (6.8%)
  • June22 (13%)
  • July18 (10%)
  • August19 (11%)
  • September16 (9.1%)
  • October17 (9.7%)
  • November18 (10%)
  • December8 (4.5%)

Light conditions at the time

  • Daylight142 (81%)
  • Dark, street lights lit32 (18%)
  • Dark, lighting unknown1 (0.6%)
  • Dark, street lights unlit1 (0.6%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B458 crashes

On the B458, 95% of collisions happened where the speed limit was 30 mph and 82% on a dry road surface.

Speed limit at the scene

  • 10 mph1 (0.6%)
  • 20 mph4 (2.3%)
  • 30 mph168 (95%)
  • 40 mph2 (1.1%)
  • 60 mph1 (0.6%)

Weather at the time

  • Fine, no high winds152 (86%)
  • Raining, no high winds19 (11%)
  • Raining with high winds1 (0.6%)
  • Other2 (1.1%)
  • Not recorded2 (1.1%)

Road surface

  • Dry144 (82%)
  • Wet or damp31 (18%)
  • Frost or ice1 (0.6%)

Type of road

  • Single carriageway100 (57%)
  • One way street or slip road67 (38%)
  • Dual carriageway7 (4%)
  • Not recorded2 (1.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B458 crashes

Pedestrians make up 36% of the people killed or injured on the B458, followed by bus or coach occupants (26%).

Casualties by road user

  • Pedestrian73 (36%)
  • Bus or coach occupant54 (26%)
  • Car occupant40 (20%)
  • Motorcyclist19 (9.3%)
  • Cyclist10 (4.9%)
  • Taxi or private hire car occupant4 (2%)
  • Van occupant2 (1%)
  • Other2 (1%)

Vehicles involved

  • Car95 (41%)
  • Bus or coach84 (36%)
  • Motorcycle19 (8.2%)
  • Pedal cycle12 (5.2%)
  • Van or goods vehicle up to 3.5 tonnes10 (4.3%)
  • Taxi or private hire car7 (3%)
  • Goods vehicle over 3.5 tonnes5 (2.1%)
  • Minibus1 (0.4%)

Casualties by age

  • 0 to 51 (0.5%)
  • 6 to 104 (2%)
  • 11 to 1516 (7.8%)
  • 16 to 2025 (12%)
  • 21 to 2524 (12%)
  • 26 to 3526 (13%)
  • 36 to 4526 (13%)
  • 46 to 5518 (8.8%)
  • 56 to 6514 (6.9%)
  • 66 to 7518 (8.8%)
  • Over 7523 (11%)
  • Not recorded9 (4.4%)

Drivers, passengers and pedestrians

  • Passenger74 (36%)
  • Pedestrian73 (36%)
  • Driver or rider57 (28%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B458

Map of the 25 most recent crashes on the B458

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

  • 25 crashes
  • Serious
  • Slight

B458 crashes by council area

Of the 176 collisions on the B458, 170 were in Harrow.

Collisions on the B458 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHarrow170196226

B458 crashes by town

Of the 176 collisions on the B458, 170 were in the built-up area of Harrow.

Recent crashes on the B458

These are the 25 most recent collisions on the B458, from 18 September 2012 to 6 May 2025.

Severity