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CrashStats

A315 accidents: crash map and statistics

Police recorded 16,808 collisions on the A315 from 1979 to 2025, with 19,194 casualties. Of those crashes, 130 were fatal and 2,364 serious, and 135 people were killed.

In 2025 there were 203 collisions on the A315, down 10% from 225 in 2024, with 223 casualties.

Collisions since 1979
16,808
41st highest of 4,923 roads
Casualties
19,194
1.14 per collision
Fatal collisions
130
135 people killed
Serious collisions
2,364
2,502 seriously injured
Collisions in 2025
203
Down 10% on 2024
Casualties in 2025
223
Down 11% on 2024

Crash severity on the A315

On the A315, 0.8% of collisions were fatal and 14% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal1300.8%
  • Serious2,36414%
  • Slight14,31485%

Where the A315 ranks among 4,923 roads

Most collisions
41st
Most casualties
49th
Most fatal collisions
157th
Most serious collisions
55th

A315 accidents by year

Collisions on the A315 peaked at 606 in 1979 and were down to 203 in 2025.

Collisions and casualties on the A315, 1979 to 2025

  • Collisions
  • Collisions in 2025: 203
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025203223
2024225251
2023226245
2022223248
2021230255
2020170193
2019232267
2018267292
2017242289
2016259292
2015262287
2014277305
2013222260
2012233273
2011250275
2010243280
2009244288
2008243277
2007201242
2006231265
2005266308
2004245292
2003323383
2002317360
2001370432
2000385448
1999339401
1998377423
1997434502
1996412492
1995411478
1994447510
1993474548
1992464514
1991466518
1990538605
1989511576
1988478540
1987460511
1986489554
1985503581
1984598676
1983553611
1982553636
1981581651
1980525634
1979606703

When crashes happen on the A315

Friday has the most collisions on the A315 (2,889), and 3pm to 6pm is the busiest time of day (3,952).

Collisions by day of the week

  • Monday2,488 (15%)
  • Tuesday2,587 (15%)
  • Wednesday2,614 (16%)
  • Thursday2,772 (16%)
  • Friday2,889 (17%)
  • Saturday2,053 (12%)
  • Sunday1,405 (8.4%)

Collisions by time of day

  • Midnight to 3am588 (3.5%)
  • 3am to 6am210 (1.2%)
  • 6am to 9am1,882 (11%)
  • 9am to noon2,638 (16%)
  • Noon to 3pm3,160 (19%)
  • 3pm to 6pm3,952 (24%)
  • 6pm to 9pm2,727 (16%)
  • 9pm to midnight1,651 (9.8%)

Collisions by month

  • January1,252 (7.4%)
  • February1,213 (7.2%)
  • March1,335 (7.9%)
  • April1,277 (7.6%)
  • May1,490 (8.9%)
  • June1,529 (9.1%)
  • July1,553 (9.2%)
  • August1,320 (7.9%)
  • September1,483 (8.8%)
  • October1,608 (9.6%)
  • November1,482 (8.8%)
  • December1,266 (7.5%)

Light conditions at the time

  • Daylight12,153 (72%)
  • Dark, street lights lit4,435 (26%)
  • Dark, lighting unknown162 (1%)
  • Dark, street lights unlit47 (0.3%)
  • Dark, no street lighting11 (0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A315 crashes

On the A315, 94% of collisions happened where the speed limit was 30 mph and 79% on a dry road surface.

Speed limit at the scene

  • 20 mph862 (5.1%)
  • 30 mph15,725 (94%)
  • 40 mph178 (1.1%)
  • 50 mph27 (0.2%)
  • 60 mph4 (under 0.1%)
  • 70 mph10 (0.1%)
  • Not recorded2 (under 0.1%)

Weather at the time

  • Fine, no high winds12,765 (76%)
  • Raining, no high winds1,792 (11%)
  • Fine with high winds116 (0.7%)
  • Raining with high winds83 (0.5%)
  • Other1,733 (10%)
  • Not recorded319 (1.9%)

Road surface

  • Dry13,359 (79%)
  • Wet or damp3,262 (19%)
  • Frost or ice50 (0.3%)
  • Snow34 (0.2%)
  • Other5 (under 0.1%)
  • Not recorded98 (0.6%)

Type of road

  • Single carriageway12,459 (74%)
  • Dual carriageway2,103 (13%)
  • One way street or slip road978 (5.8%)
  • Roundabout320 (1.9%)
  • Not recorded948 (5.6%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A315 crashes

Car occupants make up 27% of the people killed or injured on the A315, followed by pedestrians (23%).

Casualties by road user

  • Car occupant5,190 (27%)
  • Pedestrian4,364 (23%)
  • Motorcyclist3,846 (20%)
  • Cyclist3,220 (17%)
  • Bus or coach occupant1,834 (9.6%)
  • Taxi or private hire car occupant335 (1.7%)
  • Other384 (2%)
  • Not recorded21 (0.1%)

Vehicles involved

  • Car15,407 (54%)
  • Motorcycle4,293 (15%)
  • Pedal cycle3,355 (12%)
  • Bus or coach2,296 (8.1%)
  • Van or goods vehicle up to 3.5 tonnes1,457 (5.1%)
  • Taxi or private hire car956 (3.4%)
  • Other625 (2.2%)
  • Not recorded3 (under 0.1%)

Casualties by age

  • 0 to 5260 (1.4%)
  • 6 to 10336 (1.8%)
  • 11 to 15733 (3.8%)
  • 16 to 202,219 (12%)
  • 21 to 252,839 (15%)
  • 26 to 354,564 (24%)
  • 36 to 452,604 (14%)
  • 46 to 551,822 (9.5%)
  • 56 to 651,161 (6%)
  • 66 to 75847 (4.4%)
  • Over 75555 (2.9%)
  • Not recorded1,254 (6.5%)

Drivers, passengers and pedestrians

  • Driver or rider10,846 (57%)
  • Pedestrian4,364 (23%)
  • Passenger3,984 (21%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A315

Map of the 25 most recent crashes on the A315

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

  • 25 crashes
  • Serious
  • Slight

A315 crashes by council area

Collisions on the A315 were recorded in 5 council areas. Hounslow has the most, with 8,728, followed by Kensington and Chelsea (3,448) and Hammersmith and Fulham (3,087).

Collisions on the A315 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHounslow8,72810,242921,233
2ndKensington and Chelsea3,4483,76613451
3rdHammersmith and Fulham3,0873,40215396
4thWestminster1,5181,74910280
5thSpelthorne121602

A315 crashes by town

Collisions on the A315 were recorded in 4 towns and built-up areas, led by Hounslow (7,629) and Kensington and Chelsea (3,038).

Recent crashes on the A315

These are the 25 most recent collisions on the A315, from 15 November to 29 December 2025.

Severity