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CrashStats

B158 accidents: crash map and statistics

Police recorded 929 collisions on the B158 from 1979 to 2025, with 1,307 casualties. Of those crashes, 11 were fatal and 215 serious, and 11 people were killed.

In 2025 there were 6 collisions on the B158, down 25% from 8 in 2024, with 13 casualties.

Collisions since 1979
929
1,170th highest of 4,923 roads
Casualties
1,307
1.41 per collision
Fatal collisions
11
11 people killed
Serious collisions
215
261 seriously injured
Collisions in 2025
6
Down 25% on 2024
Casualties in 2025
13
Down 28% on 2024

Crash severity on the B158

On the B158, 1.2% of collisions were fatal and 23% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal111.2%
  • Serious21523%
  • Slight70376%

Where the B158 ranks among 4,923 roads

Most collisions
1,170th
Most casualties
1,131st
Most fatal collisions
1,595th
Most serious collisions
989th

B158 accidents by year

Collisions on the B158 peaked at 37 in 1980 and were down to 6 in 2025.

Collisions and casualties on the B158, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025613
2024818
202346
2022911
202188
20201012
2019711
20181218
2017810
20161523
20151319
20141517
20131419
20121417
20111519
20102126
200978
20082338
20071619
20061823
20051925
20043651
20032029
20022541
20012940
20002548
19992031
19982742
19973250
19963652
19951625
19942840
19932635
19923244
19911824
19902331
19892739
19881719
19872737
19863647
19851821
19842026
19832430
19822127
19811320
19803753
19793445

When crashes happen on the B158

Friday has the most collisions on the B158 (155), and 3pm to 6pm is the busiest time of day (239).

Collisions by day of the week

  • Monday130 (14%)
  • Tuesday137 (15%)
  • Wednesday120 (13%)
  • Thursday131 (14%)
  • Friday155 (17%)
  • Saturday142 (15%)
  • Sunday114 (12%)

Collisions by time of day

  • Midnight to 3am36 (3.9%)
  • 3am to 6am15 (1.6%)
  • 6am to 9am148 (16%)
  • 9am to noon137 (15%)
  • Noon to 3pm152 (16%)
  • 3pm to 6pm239 (26%)
  • 6pm to 9pm115 (12%)
  • 9pm to midnight87 (9.4%)

Collisions by month

  • January104 (11%)
  • February81 (8.7%)
  • March65 (7%)
  • April56 (6%)
  • May65 (7%)
  • June80 (8.6%)
  • July80 (8.6%)
  • August59 (6.4%)
  • September75 (8.1%)
  • October68 (7.3%)
  • November105 (11%)
  • December91 (9.8%)

Light conditions at the time

  • Daylight674 (73%)
  • Dark, no street lighting148 (16%)
  • Dark, street lights lit97 (10%)
  • Dark, lighting unknown5 (0.5%)
  • Dark, street lights unlit5 (0.5%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B158 crashes

On the B158, 56% of collisions happened where the speed limit was 60 mph and 50% on a dry road surface.

Speed limit at the scene

  • 30 mph383 (41%)
  • 40 mph17 (1.8%)
  • 50 mph5 (0.5%)
  • 60 mph519 (56%)
  • 70 mph5 (0.5%)

Weather at the time

  • Fine, no high winds716 (77%)
  • Raining, no high winds139 (15%)
  • Fine with high winds17 (1.8%)
  • Fog or mist14 (1.5%)
  • Other37 (4%)
  • Not recorded6 (0.6%)

Road surface

  • Dry463 (50%)
  • Wet or damp417 (45%)
  • Frost or ice31 (3.3%)
  • Snow8 (0.9%)
  • Other5 (0.5%)
  • Not recorded5 (0.5%)

Type of road

  • Single carriageway899 (97%)
  • Roundabout29 (3.1%)
  • One way street or slip road1 (0.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B158 crashes

Car occupants make up 72% of the people killed or injured on the B158, followed by motorcyclists (11%).

Casualties by road user

  • Car occupant946 (72%)
  • Motorcyclist139 (11%)
  • Pedestrian111 (8.5%)
  • Cyclist54 (4.1%)
  • Van occupant33 (2.5%)
  • Goods vehicle occupant (over 3.5 tonnes)12 (0.9%)
  • Bus or coach occupant4 (0.3%)
  • Other8 (0.6%)

Vehicles involved

  • Car1,252 (76%)
  • Motorcycle147 (9%)
  • Van or goods vehicle up to 3.5 tonnes84 (5.1%)
  • Pedal cycle63 (3.8%)
  • Goods vehicle over 3.5 tonnes52 (3.2%)
  • Bus or coach15 (0.9%)
  • Other vehicle15 (0.9%)
  • Other10 (0.6%)

Casualties by age

  • 0 to 530 (2.3%)
  • 6 to 1028 (2.1%)
  • 11 to 1551 (3.9%)
  • 16 to 20296 (23%)
  • 21 to 25190 (15%)
  • 26 to 35231 (18%)
  • 36 to 45177 (14%)
  • 46 to 55130 (9.9%)
  • 56 to 6581 (6.2%)
  • 66 to 7554 (4.1%)
  • Over 7531 (2.4%)
  • Not recorded8 (0.6%)

Drivers, passengers and pedestrians

  • Driver or rider895 (68%)
  • Passenger301 (23%)
  • Pedestrian111 (8.5%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B158

Map of the 25 most recent crashes on the B158

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B158 crashes by council area

Collisions on the B158 were recorded in 3 council areas. East Hertfordshire has the most, with 669, followed by Welwyn Hatfield (255) and Hertsmere (3).

Collisions on the B158 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stEast Hertfordshire6699338149
2ndWelwyn Hatfield255365366
3rdHertsmere3600

B158 crashes by town

Collisions on the B158 were recorded in 2 towns and built-up areas, led by Hertford (327) and Brookmans Park (18).

Recent crashes on the B158

These are the 25 most recent collisions on the B158, from 6 June 2022 to 28 December 2025.

Severity