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CrashStats

B3377 accidents: crash map and statistics

Police recorded 632 collisions on the B3377 from 1979 to 2025, with 746 casualties. Of those crashes, 7 were fatal and 82 serious, and 7 people were killed.

In 2025 there were 7 collisions on the B3377, up 75% from 4 in 2024, with 15 casualties.

Collisions since 1979
632
1,632nd highest of 4,923 roads
Casualties
746
1.18 per collision
Fatal collisions
7
7 people killed
Serious collisions
82
86 seriously injured
Collisions in 2025
7
Up 75% on 2024
Casualties in 2025
15
Up 275% on 2024

Crash severity on the B3377

On the B3377, 1.1% of collisions were fatal and 13% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal71.1%
  • Serious8213%
  • Slight54386%

Where the B3377 ranks among 4,923 roads

Most collisions
1,632nd
Most casualties
1,829th
Most fatal collisions
2,103rd
Most serious collisions
2,236th

B3377 accidents by year

Collisions on the B3377 peaked at 28 in 1989 and were down to 7 in 2025.

Collisions and casualties on the B3377, 1979 to 2025

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025715
202444
202366
202277
202133
202089
201945
201878
20171214
20161316
20151213
20141416
20131317
201258
20111013
20101011
20091618
2008911
20071212
20061316
20051621
200499
20031825
20021516
20011720
20001114
199999
199877
19971720
19962224
19951313
19941013
19931416
19921921
19911721
1990910
19892836
19882023
19872124
19862325
19852426
19841928
19831416
19821314
19811013
19802531
19792729

When crashes happen on the B3377

Thursday has the most collisions on the B3377 (107), and 3pm to 6pm is the busiest time of day (148).

Collisions by day of the week

  • Monday84 (13%)
  • Tuesday104 (16%)
  • Wednesday100 (16%)
  • Thursday107 (17%)
  • Friday101 (16%)
  • Saturday80 (13%)
  • Sunday56 (8.9%)

Collisions by time of day

  • Midnight to 3am11 (1.7%)
  • 3am to 6am11 (1.7%)
  • 6am to 9am86 (14%)
  • 9am to noon76 (12%)
  • Noon to 3pm123 (19%)
  • 3pm to 6pm148 (23%)
  • 6pm to 9pm120 (19%)
  • 9pm to midnight57 (9%)

Collisions by month

  • January53 (8.4%)
  • February42 (6.6%)
  • March51 (8.1%)
  • April48 (7.6%)
  • May50 (7.9%)
  • June49 (7.8%)
  • July52 (8.2%)
  • August47 (7.4%)
  • September61 (9.7%)
  • October80 (13%)
  • November49 (7.8%)
  • December50 (7.9%)

Light conditions at the time

  • Daylight456 (72%)
  • Dark, street lights lit167 (26%)
  • Dark, lighting unknown8 (1.3%)
  • Dark, no street lighting1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B3377 crashes

On the B3377, 93% of collisions happened where the speed limit was 30 mph and 72% on a dry road surface.

Speed limit at the scene

  • 20 mph42 (6.6%)
  • 30 mph585 (93%)
  • 40 mph2 (0.3%)
  • 60 mph3 (0.5%)

Weather at the time

  • Fine, no high winds457 (72%)
  • Raining, no high winds90 (14%)
  • Fine with high winds6 (0.9%)
  • Raining with high winds4 (0.6%)
  • Other63 (10%)
  • Not recorded12 (1.9%)

Road surface

  • Dry455 (72%)
  • Wet or damp167 (26%)
  • Frost or ice5 (0.8%)
  • Snow3 (0.5%)
  • Oil or diesel1 (0.2%)
  • Not recorded1 (0.2%)

Type of road

  • Single carriageway556 (88%)
  • Dual carriageway14 (2.2%)
  • Roundabout13 (2.1%)
  • One way street or slip road3 (0.5%)
  • Not recorded46 (7.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B3377 crashes

Car occupants make up 39% of the people killed or injured on the B3377, followed by pedestrians (27%).

Casualties by road user

  • Car occupant293 (39%)
  • Pedestrian205 (27%)
  • Cyclist109 (15%)
  • Motorcyclist104 (14%)
  • Bus or coach occupant17 (2.3%)
  • Minibus occupant5 (0.7%)
  • Other11 (1.5%)
  • Not recorded2 (0.3%)

Vehicles involved

  • Car730 (68%)
  • Motorcycle113 (11%)
  • Pedal cycle113 (11%)
  • Van or goods vehicle up to 3.5 tonnes56 (5.2%)
  • Bus or coach26 (2.4%)
  • Goods vehicle over 3.5 tonnes14 (1.3%)
  • Other vehicle8 (0.7%)
  • Other10 (0.9%)

Casualties by age

  • 0 to 523 (3.1%)
  • 6 to 1058 (7.8%)
  • 11 to 1570 (9.4%)
  • 16 to 20128 (17%)
  • 21 to 2594 (13%)
  • 26 to 35125 (17%)
  • 36 to 4586 (12%)
  • 46 to 5556 (7.5%)
  • 56 to 6539 (5.2%)
  • 66 to 7520 (2.7%)
  • Over 7518 (2.4%)
  • Not recorded29 (3.9%)

Drivers, passengers and pedestrians

  • Driver or rider421 (56%)
  • Pedestrian205 (27%)
  • Passenger120 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B3377

Map of the 25 most recent crashes on the B3377

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

  • 25 crashes
  • Serious
  • Slight

B3377 crashes by council area

All 632 collisions on the B3377 were in Hounslow.

Collisions on the B3377 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHounslow632746782

B3377 crashes by town

Of the 632 collisions on the B3377, 570 were in the built-up area of Hounslow.

Recent crashes on the B3377

These are the 25 most recent collisions on the B3377, from 22 September 2021 to 10 November 2025.

Severity