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CrashStats

A503 accidents: crash map and statistics

Police recorded 14,673 collisions on the A503 from 1979 to 2025, with 17,346 casualties. Of those crashes, 142 were fatal and 2,258 serious, and 145 people were killed.

In 2025 there were 158 collisions on the A503, down 15% from 186 in 2024, with 167 casualties.

Collisions since 1979
14,673
48th highest of 4,923 roads
Casualties
17,346
1.18 per collision
Fatal collisions
142
145 people killed
Serious collisions
2,258
2,425 seriously injured
Collisions in 2025
158
Down 15% on 2024
Casualties in 2025
167
Down 20% on 2024

Crash severity on the A503

On the A503, 1% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal1421%
  • Serious2,25815%
  • Slight12,27384%

Where the A503 ranks among 4,923 roads

Most collisions
48th
Most casualties
55th
Most fatal collisions
146th
Most serious collisions
56th

A503 accidents by year

Collisions on the A503 peaked at 452 in 2000 and were down to 158 in 2025.

Collisions and casualties on the A503, 1979 to 2025

  • Collisions
  • Collisions in 2025: 158
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
2025158167
2024186209
2023174195
2022229254
2021242269
2020193215
2019254285
2018238290
2017275345
2016241302
2015278342
2014297351
2013250290
2012254293
2011311393
2010238285
2009256305
2008219258
2007209258
2006213265
2005261290
2004285324
2003356427
2002397463
2001409492
2000452548
1999364430
1998394483
1997411491
1996420473
1995378419
1994363424
1993348403
1992349411
1991371429
1990359413
1989379442
1988365415
1987347418
1986349435
1985337382
1984396472
1983375462
1982397465
1981368443
1980363462
1979365459

When crashes happen on the A503

Friday has the most collisions on the A503 (2,357), and 3pm to 6pm is the busiest time of day (3,025).

Collisions by day of the week

  • Monday2,025 (14%)
  • Tuesday2,217 (15%)
  • Wednesday2,029 (14%)
  • Thursday2,246 (15%)
  • Friday2,357 (16%)
  • Saturday2,156 (15%)
  • Sunday1,643 (11%)

Collisions by time of day

  • Midnight to 3am877 (6%)
  • 3am to 6am418 (2.8%)
  • 6am to 9am1,667 (11%)
  • 9am to noon2,135 (15%)
  • Noon to 3pm2,353 (16%)
  • 3pm to 6pm3,025 (21%)
  • 6pm to 9pm2,462 (17%)
  • 9pm to midnight1,736 (12%)

Collisions by month

  • January1,104 (7.5%)
  • February1,070 (7.3%)
  • March1,237 (8.4%)
  • April1,157 (7.9%)
  • May1,330 (9.1%)
  • June1,302 (8.9%)
  • July1,309 (8.9%)
  • August1,184 (8.1%)
  • September1,274 (8.7%)
  • October1,351 (9.2%)
  • November1,240 (8.5%)
  • December1,115 (7.6%)

Light conditions at the time

  • Daylight9,788 (67%)
  • Dark, street lights lit4,674 (32%)
  • Dark, lighting unknown174 (1.2%)
  • Dark, street lights unlit27 (0.2%)
  • Dark, no street lighting10 (0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A503 crashes

On the A503, 91% of collisions happened where the speed limit was 30 mph and 78% on a dry road surface.

Speed limit at the scene

  • 20 mph1,123 (7.7%)
  • 30 mph13,405 (91%)
  • 40 mph117 (0.8%)
  • 50 mph23 (0.2%)
  • 60 mph3 (under 0.1%)
  • 70 mph2 (under 0.1%)

Weather at the time

  • Fine, no high winds11,297 (77%)
  • Raining, no high winds1,770 (12%)
  • Fine with high winds119 (0.8%)
  • Raining with high winds74 (0.5%)
  • Other1,165 (7.9%)
  • Not recorded248 (1.7%)

Road surface

  • Dry11,416 (78%)
  • Wet or damp3,070 (21%)
  • Frost or ice56 (0.4%)
  • Snow35 (0.2%)
  • Other8 (0.1%)
  • Not recorded88 (0.6%)

Type of road

  • Single carriageway9,632 (66%)
  • One way street or slip road2,525 (17%)
  • Dual carriageway1,842 (13%)
  • Roundabout10 (0.1%)
  • Not recorded664 (4.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A503 crashes

Car occupants make up 36% of the people killed or injured on the A503, followed by pedestrians (23%).

Casualties by road user

  • Car occupant6,242 (36%)
  • Pedestrian3,995 (23%)
  • Motorcyclist3,221 (19%)
  • Cyclist1,880 (11%)
  • Bus or coach occupant1,246 (7.2%)
  • Van occupant343 (2%)
  • Other394 (2.3%)
  • Not recorded25 (0.1%)

Vehicles involved

  • Car15,394 (61%)
  • Motorcycle3,646 (14%)
  • Pedal cycle1,961 (7.8%)
  • Bus or coach1,564 (6.2%)
  • Van or goods vehicle up to 3.5 tonnes1,537 (6.1%)
  • Taxi or private hire car510 (2%)
  • Other683 (2.7%)
  • Not recorded2 (under 0.1%)

Casualties by age

  • 0 to 5276 (1.6%)
  • 6 to 10360 (2.1%)
  • 11 to 15586 (3.4%)
  • 16 to 201,744 (10%)
  • 21 to 252,604 (15%)
  • 26 to 354,532 (26%)
  • 36 to 452,627 (15%)
  • 46 to 551,671 (9.6%)
  • 56 to 65948 (5.5%)
  • 66 to 75555 (3.2%)
  • Over 75334 (1.9%)
  • Not recorded1,109 (6.4%)

Drivers, passengers and pedestrians

  • Driver or rider9,479 (55%)
  • Pedestrian3,995 (23%)
  • Passenger3,872 (22%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A503

Map of the 25 most recent crashes on the A503

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A503 crashes by council area

Collisions on the A503 were recorded in 5 council areas. Islington has the most, with 4,004, followed by Haringey (3,086) and Waltham Forest (2,865).

Collisions on the A503 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stIslington4,0044,65749623
2ndHaringey3,0863,62623396
3rdWaltham Forest2,8653,49332437
4thCamden2,6383,07615428
5thHackney2,0692,47923373

A503 crashes by town

Collisions on the A503 were recorded in 5 towns and built-up areas, led by Haringey (3,326) and Islington (3,257).

Recent crashes on the A503

These are the 25 most recent collisions on the A503, from 3 November to 30 December 2025.

Severity