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CrashStats

HP11 road accidents: crash map and statistics

Police recorded 4,514 road traffic collisions in the HP11 postcode district, Buckinghamshire, from 1979 to 2025, and 5,799 people were killed or injured in them. Of those collisions, 44 were fatal and 616 were serious.

In 2025 police recorded 61 collisions, up 2% on 2024 (60).

Collisions since 1979
4,514
700th highest of 2,813 postcode districts
Casualties
5,799
1.28 per collision
Fatal collisions
44
48 people killed
Serious collisions
616
679 seriously injured
Collisions in 2025
61
Up 2% on 2024
Casualties in 2025
83
Up 22% on 2024

Road collision statistics for HP11

Collisions by severity, 1979 to 2025

  • Fatal441%
  • Serious61614%
  • Slight3,85485%

What the data shows

  • HP11 had 538 collisions from 2016 to 2025, 34% fewer than the 812 from 2006 to 2015.
  • 15% of collisions in HP11 were fatal or serious, against 20% across Great Britain.
  • 600 children under 16 were killed or injured in HP11, 11% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 31% of collisions in HP11.

Where HP11 ranks among 2,813 postcode districts

Most collisions
700th
Most casualties
755th
Most fatal collisions
1,376th
Most serious collisions
1,157th

Collisions by day of the week

  • Monday670 (15%)
  • Tuesday677 (15%)
  • Wednesday646 (14%)
  • Thursday683 (15%)
  • Friday791 (18%)
  • Saturday613 (14%)
  • Sunday434 (9.6%)

Light conditions

  • Daylight3,201 (71%)
  • Dark, street lights lit1,118 (25%)
  • Dark, no street lighting107 (2.4%)
  • Dark, lighting unknown67 (1.5%)
  • Dark, street lights unlit16 (0.4%)
  • Not recorded5 (0.1%)

Type of road

  • Single carriageway2,723 (60%)
  • Dual carriageway807 (18%)
  • Roundabout752 (17%)
  • One way street or slip road220 (4.9%)
  • Not recorded12 (0.3%)

Speed limit at the scene

  • 20 mph1 (under 0.1%)
  • 30 mph3,518 (78%)
  • 40 mph320 (7.1%)
  • 50 mph8 (0.2%)
  • 60 mph240 (5.3%)
  • 70 mph427 (9.5%)

Weather at the time

  • Fine, no high winds3,602 (80%)
  • Raining, no high winds593 (13%)
  • Fine with high winds48 (1.1%)
  • Raining with high winds36 (0.8%)
  • Fog or mist27 (0.6%)
  • Snowing, no high winds21 (0.5%)
  • Snowing with high winds3 (0.1%)
  • Other129 (2.9%)
  • Not recorded55 (1.2%)

Who was hurt

  • Car occupant3,341 (58%)
  • Pedestrian1,001 (17%)
  • Motorcyclist745 (13%)
  • Cyclist379 (6.5%)
  • Van occupant126 (2.2%)
  • Bus or coach occupant114 (2%)
  • Taxi or private hire car occupant33 (0.6%)
  • Goods vehicle occupant (over 3.5 tonnes)31 (0.5%)
  • Other vehicle occupant15 (0.3%)
  • Minibus occupant10 (0.2%)
  • Other2 (under 0.1%)
  • Not recorded2 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

HP11 road accidents by year

Collisions and casualties in HP11, 1979 to 2025

Collisions in HP11 peaked at 152 in 1984; 2025 had 61.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20256183
20246068
20234958
20226884
20213947
20203242
20195262
20185976
20175071
20166888
20156486
20148094
20136495
20127796
201192120
201083121
200976109
200897127
200793121
200686113
200596133
2004117141
2003111146
2002121150
2001108151
2000110152
1999123165
1998102134
1997120179
1996129152
1995115154
1994106149
1993114139
1992123155
1991114138
1990124155
1989111135
1988120147
1987143190
1986114147
1985149189
1984152188
1983123148
1982123141
1981110135
19806977
1979117148

Map of recent crashes in HP11

Map of the 24 most recent crashes in HP11

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

  • 24 crashes
  • Serious
  • Slight

Recent road crashes in HP11

The 24 most recent collisions in HP11 happened between 8 August and 22 December 2025.

Severity

Crashes by road in HP11

The A40 has the most collisions in HP11, 1,615 of 4,514 (36%), followed by the A404 (693).

Collisions in HP11 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA401,6152,03612241
2ndA404693903379
3rdM403786291155
4thA401082105213
5thA4128273107

Council area for HP11

HP11 is in Buckinghamshire, where police recorded 72,942 collisions from 1979 to 2025. HP11 accounts for 6.2% of them.

Towns in HP11

Collisions in HP11 were recorded in 2 towns, led by High Wycombe (3,811) and Bourne End and Flackwell Heath (8).