Skip to main content
CrashStats

A509 accidents: crash map and statistics

Police recorded 3,698 collisions on the A509 from 1979 to 2025, with 5,198 casualties. Of those crashes, 69 were fatal and 795 serious, and 72 people were killed.

In 2025 there were 37 collisions on the A509, down 3% from 38 in 2024, with 43 casualties.

Collisions since 1979
3,698
304th highest of 4,923 roads
Casualties
5,198
1.41 per collision
Fatal collisions
69
72 people killed
Serious collisions
795
1,005 seriously injured
Collisions in 2025
37
Down 3% on 2024
Casualties in 2025
43
Down 10% on 2024

Crash severity on the A509

On the A509, 1.9% of collisions were fatal and 21% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal691.9%
  • Serious79521%
  • Slight2,83477%

Where the A509 ranks among 4,923 roads

Most collisions
304th
Most casualties
289th
Most fatal collisions
303rd
Most serious collisions
243rd

A509 accidents by year

Collisions on the A509 peaked at 129 in 1998 and were down to 37 in 2025.

Collisions and casualties on the A509, 1979 to 2025

  • Collisions
  • Collisions in 2025: 37
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253743
20243848
20233951
20224764
20213349
20204049
20194862
20186891
20174665
20165274
20156191
20145881
20135076
20124872
20116192
201080103
200985119
200872108
200781118
200675104
20057194
200477115
200393124
200294142
2001114162
2000115163
1999105140
1998129212
1997116167
1996115170
199597140
199490131
199395155
19927491
199181117
199085124
1989110153
1988122167
1987123152
1986125162
198584105
198492119
198387127
198297134
198170104
19805478
19796490

When crashes happen on the A509

Friday has the most collisions on the A509 (661), and 3pm to 6pm is the busiest time of day (835).

Collisions by day of the week

  • Monday504 (14%)
  • Tuesday524 (14%)
  • Wednesday546 (15%)
  • Thursday539 (15%)
  • Friday661 (18%)
  • Saturday504 (14%)
  • Sunday420 (11%)

Collisions by time of day

  • Midnight to 3am143 (3.9%)
  • 3am to 6am89 (2.4%)
  • 6am to 9am563 (15%)
  • 9am to noon539 (15%)
  • Noon to 3pm672 (18%)
  • 3pm to 6pm835 (23%)
  • 6pm to 9pm514 (14%)
  • 9pm to midnight343 (9.3%)

Collisions by month

  • January282 (7.6%)
  • February268 (7.2%)
  • March268 (7.2%)
  • April230 (6.2%)
  • May297 (8%)
  • June309 (8.4%)
  • July328 (8.9%)
  • August311 (8.4%)
  • September317 (8.6%)
  • October361 (9.8%)
  • November392 (11%)
  • December335 (9.1%)

Light conditions at the time

  • Daylight2,596 (70%)
  • Dark, street lights lit675 (18%)
  • Dark, no street lighting330 (8.9%)
  • Dark, lighting unknown74 (2%)
  • Dark, street lights unlit22 (0.6%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A509 crashes

On the A509, 44% of collisions happened where the speed limit was 60 mph and 62% on a dry road surface.

Speed limit at the scene

  • 30 mph792 (21%)
  • 40 mph347 (9.4%)
  • 50 mph36 (1%)
  • 60 mph1,640 (44%)
  • 70 mph883 (24%)

Weather at the time

  • Fine, no high winds2,901 (78%)
  • Raining, no high winds480 (13%)
  • Fine with high winds70 (1.9%)
  • Fog or mist50 (1.4%)
  • Other146 (3.9%)
  • Not recorded51 (1.4%)

Road surface

  • Dry2,293 (62%)
  • Wet or damp1,249 (34%)
  • Frost or ice103 (2.8%)
  • Snow26 (0.7%)
  • Flood over 3cm deep6 (0.2%)
  • Not recorded21 (0.6%)

Type of road

  • Single carriageway2,006 (54%)
  • Roundabout907 (25%)
  • Dual carriageway685 (19%)
  • One way street or slip road95 (2.6%)
  • Not recorded5 (0.1%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A509 crashes

Car occupants make up 73% of the people killed or injured on the A509, followed by motorcyclists (12%).

Casualties by road user

  • Car occupant3,780 (73%)
  • Motorcyclist637 (12%)
  • Pedestrian252 (4.8%)
  • Cyclist205 (3.9%)
  • Van occupant139 (2.7%)
  • Goods vehicle occupant (over 3.5 tonnes)83 (1.6%)
  • Bus or coach occupant48 (0.9%)
  • Other54 (1%)

Vehicles involved

  • Car5,546 (76%)
  • Motorcycle632 (8.7%)
  • Goods vehicle over 3.5 tonnes388 (5.3%)
  • Van or goods vehicle up to 3.5 tonnes319 (4.4%)
  • Pedal cycle212 (2.9%)
  • Bus or coach54 (0.7%)
  • Other103 (1.4%)
  • Not recorded3 (under 0.1%)

Casualties by age

  • 0 to 596 (1.8%)
  • 6 to 10121 (2.3%)
  • 11 to 15182 (3.5%)
  • 16 to 20847 (16%)
  • 21 to 25724 (14%)
  • 26 to 351,143 (22%)
  • 36 to 45832 (16%)
  • 46 to 55556 (11%)
  • 56 to 65358 (6.9%)
  • 66 to 75163 (3.1%)
  • Over 75103 (2%)
  • Not recorded73 (1.4%)

Drivers, passengers and pedestrians

  • Driver or rider3,510 (68%)
  • Passenger1,436 (28%)
  • Pedestrian252 (4.8%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A509

Map of the 25 most recent crashes on the A509

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

  • 25 crashes
  • Serious
  • Slight

A509 crashes by council area

Collisions on the A509 were recorded in 4 council areas. Milton Keynes has the most, with 1,942, followed by North Northamptonshire (1,746) and Camden (5).

Collisions on the A509 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stMilton Keynes1,9422,69531250
2ndNorth Northamptonshire1,7462,49238543
3rdCamden5602
4thWest Northamptonshire4400

A509 crashes by town

Collisions on the A509 were recorded in 7 towns and built-up areas, led by Wellingborough (361) and Olney (216).

Recent crashes on the A509

These are the 25 most recent collisions on the A509, from 1 March to 17 December 2025.

Severity