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CrashStats

B491 accidents: crash map and statistics

Police recorded 288 collisions on the B491 from 1979 to 2025, with 321 casualties. Of those crashes, 3 were fatal and 45 serious, and 3 people were killed.

In 2025 there were 4 collisions on the B491, down 33% from 6 in 2024, with 4 casualties.

Collisions since 1979
288
2,753rd highest of 4,923 roads
Casualties
321
1.11 per collision
Fatal collisions
3
3 people killed
Serious collisions
45
53 seriously injured
Collisions in 2025
4
Down 33% on 2024
Casualties in 2025
4
Down 33% on 2024

Crash severity on the B491

On the B491, 1% of collisions were fatal and 16% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal31%
  • Serious4516%
  • Slight24083%

Where the B491 ranks among 4,923 roads

Most collisions
2,753rd
Most casualties
3,032nd
Most fatal collisions
3,114th
Most serious collisions
3,115th

B491 accidents by year

Collisions on the B491 peaked at 19 in 1984 and were down to 4 in 2025.

Collisions and casualties on the B491, 1979 to 2025

  • Collisions
  • Collisions in 2025: 4
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202544
202466
202377
202222
202133
202022
201922
201834
201799
201633
201522
201444
201322
201255
201144
201011
200933
200833
200711
200634
200533
200456
200344
200233
200133
200045
199944
19981010
19971212
1996612
199588
199477
199388
199288
19911213
19901013
198955
198866
1987910
198677
19851011
19841930
19831414
19821112
198177
19801417
19791012

When crashes happen on the B491

Friday has the most collisions on the B491 (53), and 3pm to 6pm is the busiest time of day (69).

Collisions by day of the week

  • Monday36 (13%)
  • Tuesday40 (14%)
  • Wednesday43 (15%)
  • Thursday40 (14%)
  • Friday53 (18%)
  • Saturday46 (16%)
  • Sunday30 (10%)

Collisions by time of day

  • Midnight to 3am13 (4.5%)
  • 3am to 6am1 (0.3%)
  • 6am to 9am28 (9.7%)
  • 9am to noon48 (17%)
  • Noon to 3pm50 (17%)
  • 3pm to 6pm69 (24%)
  • 6pm to 9pm51 (18%)
  • 9pm to midnight28 (9.7%)

Collisions by month

  • January22 (7.6%)
  • February28 (9.7%)
  • March22 (7.6%)
  • April16 (5.6%)
  • May28 (9.7%)
  • June29 (10%)
  • July17 (5.9%)
  • August20 (6.9%)
  • September29 (10%)
  • October23 (8%)
  • November27 (9.4%)
  • December27 (9.4%)

Light conditions at the time

  • Daylight201 (70%)
  • Dark, street lights lit83 (29%)
  • Dark, lighting unknown3 (1%)
  • Dark, street lights unlit1 (0.3%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B491 crashes

On the B491, 90% of collisions happened where the speed limit was 30 mph and 76% on a dry road surface.

Speed limit at the scene

  • 20 mph30 (10%)
  • 30 mph258 (90%)

Weather at the time

  • Fine, no high winds217 (75%)
  • Raining, no high winds42 (15%)
  • Raining with high winds1 (0.3%)
  • Other26 (9%)
  • Not recorded2 (0.7%)

Road surface

  • Dry219 (76%)
  • Wet or damp65 (23%)
  • Frost or ice2 (0.7%)
  • Not recorded2 (0.7%)

Type of road

  • Single carriageway253 (88%)
  • Roundabout13 (4.5%)
  • Dual carriageway2 (0.7%)
  • One way street or slip road1 (0.3%)
  • Not recorded19 (6.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B491 crashes

Car occupants make up 29% of the people killed or injured on the B491, followed by pedestrians (28%).

Casualties by road user

  • Car occupant94 (29%)
  • Pedestrian91 (28%)
  • Cyclist54 (17%)
  • Motorcyclist49 (15%)
  • Bus or coach occupant26 (8.1%)
  • Van occupant5 (1.6%)
  • Other vehicle occupant2 (0.6%)

Vehicles involved

  • Car285 (61%)
  • Motorcycle58 (12%)
  • Pedal cycle56 (12%)
  • Bus or coach37 (7.9%)
  • Van or goods vehicle up to 3.5 tonnes20 (4.3%)
  • Goods vehicle over 3.5 tonnes4 (0.9%)
  • Taxi or private hire car4 (0.9%)
  • Other vehicle3 (0.6%)

Casualties by age

  • 0 to 513 (4%)
  • 6 to 1010 (3.1%)
  • 11 to 1511 (3.4%)
  • 16 to 2020 (6.2%)
  • 21 to 2547 (15%)
  • 26 to 3571 (22%)
  • 36 to 4540 (12%)
  • 46 to 5537 (12%)
  • 56 to 6526 (8.1%)
  • 66 to 7515 (4.7%)
  • Over 7512 (3.7%)
  • Not recorded19 (5.9%)

Drivers, passengers and pedestrians

  • Driver or rider164 (51%)
  • Pedestrian91 (28%)
  • Passenger66 (21%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B491

Map of the 25 most recent crashes on the B491

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

  • 25 crashes
  • Serious
  • Slight

B491 crashes by council area

Collisions on the B491 were recorded in 2 council areas. Ealing has the most, with 174, followed by Hounslow (113).

Collisions on the B491 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stEaling174207327
2ndHounslow113113017

B491 crashes by town

Collisions on the B491 were recorded in 2 towns and built-up areas, led by Ealing (143) and Hounslow (70).

Recent crashes on the B491

These are the 25 most recent collisions on the B491, from 5 October 2019 to 22 August 2025.

Severity