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CrashStats

A109 accidents: crash map and statistics

Police recorded 4,587 collisions on the A109 from 1979 to 2025, with 5,617 casualties. Of those crashes, 44 were fatal and 592 serious, and 50 people were killed.

In 2025 there were 57 collisions on the A109, down 22% from 73 in 2024, with 64 casualties.

Collisions since 1979
4,587
229th highest of 4,923 roads
Casualties
5,617
1.22 per collision
Fatal collisions
44
50 people killed
Serious collisions
592
644 seriously injured
Collisions in 2025
57
Down 22% on 2024
Casualties in 2025
64
Down 26% on 2024

Crash severity on the A109

On the A109, 1% of collisions were fatal and 13% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal441%
  • Serious59213%
  • Slight3,95186%

Where the A109 ranks among 4,923 roads

Most collisions
229th
Most casualties
264th
Most fatal collisions
468th
Most serious collisions
342nd

A109 accidents by year

Collisions on the A109 peaked at 148 in 1987 and were down to 57 in 2025.

Collisions and casualties on the A109, 1979 to 2025

  • Collisions
  • Collisions in 2025: 57
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20255764
20247386
20237590
20225971
20218089
20206883
20196887
20186976
201785110
20167683
201593118
201482108
20135558
20128192
20117996
201094111
20097398
20084964
200772102
200681101
200596108
200499117
2003115153
2002128155
2001121137
2000125154
1999104119
199887109
199798124
19967989
1995122138
1994118145
1993105122
199298114
1991118148
1990140169
1989117145
1988125150
1987148191
1986106137
1985110133
1984117137
1983120144
1982115142
1981135182
1980130167
1979142201

When crashes happen on the A109

Friday has the most collisions on the A109 (740), and 3pm to 6pm is the busiest time of day (998).

Collisions by day of the week

  • Monday577 (13%)
  • Tuesday686 (15%)
  • Wednesday657 (14%)
  • Thursday666 (15%)
  • Friday740 (16%)
  • Saturday721 (16%)
  • Sunday540 (12%)

Collisions by time of day

  • Midnight to 3am194 (4.2%)
  • 3am to 6am98 (2.1%)
  • 6am to 9am534 (12%)
  • 9am to noon637 (14%)
  • Noon to 3pm772 (17%)
  • 3pm to 6pm998 (22%)
  • 6pm to 9pm799 (17%)
  • 9pm to midnight555 (12%)

Collisions by month

  • January374 (8.2%)
  • February356 (7.8%)
  • March389 (8.5%)
  • April343 (7.5%)
  • May391 (8.5%)
  • June356 (7.8%)
  • July404 (8.8%)
  • August325 (7.1%)
  • September373 (8.1%)
  • October437 (9.5%)
  • November410 (8.9%)
  • December429 (9.4%)

Light conditions at the time

  • Daylight3,058 (67%)
  • Dark, street lights lit1,464 (32%)
  • Dark, lighting unknown45 (1%)
  • Dark, street lights unlit18 (0.4%)
  • Dark, no street lighting2 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A109 crashes

On the A109, 91% of collisions happened where the speed limit was 30 mph and 73% on a dry road surface.

Speed limit at the scene

  • 20 mph251 (5.5%)
  • 30 mph4,173 (91%)
  • 40 mph148 (3.2%)
  • 50 mph13 (0.3%)
  • 60 mph1 (under 0.1%)
  • 70 mph1 (under 0.1%)

Weather at the time

  • Fine, no high winds3,384 (74%)
  • Raining, no high winds632 (14%)
  • Fine with high winds32 (0.7%)
  • Raining with high winds27 (0.6%)
  • Other427 (9.3%)
  • Not recorded85 (1.9%)

Road surface

  • Dry3,345 (73%)
  • Wet or damp1,142 (25%)
  • Frost or ice32 (0.7%)
  • Snow19 (0.4%)
  • Other4 (0.1%)
  • Not recorded45 (1%)

Type of road

  • Single carriageway3,609 (79%)
  • Dual carriageway503 (11%)
  • Roundabout121 (2.6%)
  • One way street or slip road54 (1.2%)
  • Not recorded300 (6.5%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A109 crashes

Car occupants make up 51% of the people killed or injured on the A109, followed by pedestrians (22%).

Casualties by road user

  • Car occupant2,872 (51%)
  • Pedestrian1,216 (22%)
  • Motorcyclist681 (12%)
  • Cyclist353 (6.3%)
  • Bus or coach occupant310 (5.5%)
  • Van occupant110 (2%)
  • Other69 (1.2%)
  • Not recorded6 (0.1%)

Vehicles involved

  • Car5,753 (73%)
  • Motorcycle759 (9.6%)
  • Van or goods vehicle up to 3.5 tonnes471 (5.9%)
  • Pedal cycle362 (4.6%)
  • Bus or coach344 (4.3%)
  • Goods vehicle over 3.5 tonnes114 (1.4%)
  • Taxi or private hire car57 (0.7%)
  • Other68 (0.9%)

Casualties by age

  • 0 to 5112 (2%)
  • 6 to 10179 (3.2%)
  • 11 to 15278 (4.9%)
  • 16 to 20693 (12%)
  • 21 to 25776 (14%)
  • 26 to 351,230 (22%)
  • 36 to 45779 (14%)
  • 46 to 55564 (10%)
  • 56 to 65317 (5.6%)
  • 66 to 75221 (3.9%)
  • Over 75136 (2.4%)
  • Not recorded332 (5.9%)

Drivers, passengers and pedestrians

  • Driver or rider2,990 (53%)
  • Passenger1,411 (25%)
  • Pedestrian1,216 (22%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A109

Map of the 25 most recent crashes on the A109

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

  • 25 crashes
  • Serious
  • Slight

A109 crashes by council area

Collisions on the A109 were recorded in 3 council areas. Haringey has the most, with 3,433, followed by Barnet (693) and Enfield (456).

Collisions on the A109 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stHaringey3,4334,18134438
2ndBarnet693822697
3rdEnfield456608456

A109 crashes by town

Collisions on the A109 were recorded in 3 towns and built-up areas, led by Haringey (2,995) and Barnet (634).

Recent crashes on the A109

These are the 25 most recent collisions on the A109, from 13 July to 18 December 2025.

Severity