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CrashStats

B487 accidents: crash map and statistics

Police recorded 896 collisions on the B487 from 1979 to 2025, with 1,332 casualties. Of those crashes, 24 were fatal and 197 serious, and 26 people were killed.

In 2025 there were 4 collisions on the B487, down 33% from 6 in 2024, with 6 casualties.

Collisions since 1979
896
1,206th highest of 4,923 roads
Casualties
1,332
1.49 per collision
Fatal collisions
24
26 people killed
Serious collisions
197
246 seriously injured
Collisions in 2025
4
Down 33% on 2024
Casualties in 2025
6
Down 14% on 2024

Crash severity on the B487

On the B487, 2.7% of collisions were fatal and 22% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal242.7%
  • Serious19722%
  • Slight67575%

Where the B487 ranks among 4,923 roads

Most collisions
1,206th
Most casualties
1,109th
Most fatal collisions
836th
Most serious collisions
1,059th

B487 accidents by year

Collisions on the B487 peaked at 37 in 1986 and were down to 4 in 2025.

Collisions and casualties on the B487, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202546
202467
2023913
20221425
2021912
20201314
20191321
20181527
20171424
20161422
20151724
20141219
201368
2012914
20111420
20101321
20092342
20081323
20072335
20062437
20052643
20042136
20031825
20022034
20013447
20002839
19992028
19981624
19972233
19963551
19952024
19942331
19933154
19922633
19912231
19902426
19892331
19883653
19871923
19863747
19852747
19842435
19831525
19821521
19811929
19801625
19791423

When crashes happen on the B487

Tuesday has the most collisions on the B487 (145), and 3pm to 6pm is the busiest time of day (216).

Collisions by day of the week

  • Monday126 (14%)
  • Tuesday145 (16%)
  • Wednesday139 (16%)
  • Thursday139 (16%)
  • Friday141 (16%)
  • Saturday124 (14%)
  • Sunday82 (9.2%)

Collisions by time of day

  • Midnight to 3am27 (3%)
  • 3am to 6am9 (1%)
  • 6am to 9am126 (14%)
  • 9am to noon103 (11%)
  • Noon to 3pm156 (17%)
  • 3pm to 6pm216 (24%)
  • 6pm to 9pm155 (17%)
  • 9pm to midnight104 (12%)

Collisions by month

  • January82 (9.2%)
  • February65 (7.3%)
  • March73 (8.1%)
  • April61 (6.8%)
  • May80 (8.9%)
  • June75 (8.4%)
  • July76 (8.5%)
  • August65 (7.3%)
  • September79 (8.8%)
  • October80 (8.9%)
  • November91 (10%)
  • December69 (7.7%)

Light conditions at the time

  • Daylight611 (68%)
  • Dark, street lights lit205 (23%)
  • Dark, no street lighting54 (6%)
  • Dark, lighting unknown15 (1.7%)
  • Dark, street lights unlit11 (1.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B487 crashes

On the B487, 41% of collisions happened where the speed limit was 30 mph and 59% on a dry road surface.

Speed limit at the scene

  • 30 mph371 (41%)
  • 40 mph274 (31%)
  • 50 mph3 (0.3%)
  • 60 mph248 (28%)

Weather at the time

  • Fine, no high winds668 (75%)
  • Raining, no high winds155 (17%)
  • Fog or mist12 (1.3%)
  • Fine with high winds10 (1.1%)
  • Other36 (4%)
  • Not recorded15 (1.7%)

Road surface

  • Dry525 (59%)
  • Wet or damp347 (39%)
  • Frost or ice18 (2%)
  • Snow2 (0.2%)
  • Not recorded4 (0.4%)

Type of road

  • Single carriageway834 (93%)
  • Roundabout48 (5.4%)
  • Dual carriageway8 (0.9%)
  • One way street or slip road5 (0.6%)
  • Not recorded1 (0.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B487 crashes

Car occupants make up 69% of the people killed or injured on the B487, followed by motorcyclists (9.4%).

Casualties by road user

  • Car occupant916 (69%)
  • Motorcyclist125 (9.4%)
  • Pedestrian121 (9.1%)
  • Cyclist91 (6.8%)
  • Van occupant47 (3.5%)
  • Goods vehicle occupant (over 3.5 tonnes)7 (0.5%)
  • Minibus occupant7 (0.5%)
  • Other18 (1.4%)

Vehicles involved

  • Car1,362 (77%)
  • Motorcycle128 (7.2%)
  • Van or goods vehicle up to 3.5 tonnes99 (5.6%)
  • Pedal cycle93 (5.3%)
  • Goods vehicle over 3.5 tonnes40 (2.3%)
  • Other vehicle13 (0.7%)
  • Bus or coach12 (0.7%)
  • Other21 (1.2%)

Casualties by age

  • 0 to 518 (1.4%)
  • 6 to 1043 (3.2%)
  • 11 to 1574 (5.6%)
  • 16 to 20224 (17%)
  • 21 to 25198 (15%)
  • 26 to 35260 (20%)
  • 36 to 45193 (14%)
  • 46 to 55143 (11%)
  • 56 to 6578 (5.9%)
  • 66 to 7552 (3.9%)
  • Over 7539 (2.9%)
  • Not recorded10 (0.8%)

Drivers, passengers and pedestrians

  • Driver or rider879 (66%)
  • Passenger332 (25%)
  • Pedestrian121 (9.1%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B487

Map of the 25 most recent crashes on the B487

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

B487 crashes by council area

Collisions on the B487 were recorded in 5 council areas. Dacorum has the most, with 565, followed by St Albans (316) and Ceredigion (4).

Collisions on the B487 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stDacorum56579310106
2ndSt Albans3165191488
3rdCeredigion4801
4thNorth Hertfordshire3401
5thPembrokeshire3300

B487 crashes by town

Collisions on the B487 were recorded in 3 towns and built-up areas, led by Hemel Hempstead (541) and Harpenden (40).

Recent crashes on the B487

These are the 25 most recent collisions on the B487, from 13 August 2022 to 21 July 2025.

Severity