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CrashStats

HP18 road accidents: crash map and statistics

Police recorded 2,427 road traffic collisions in the HP18 postcode district, Buckinghamshire, from 1979 to 2025, and 3,697 people were killed or injured in them. Of those collisions, 69 were fatal and 518 were serious.

In 2025 police recorded 31 collisions, up from 16 in 2024.

Collisions since 1979
2,427
1,554th of 2,813 postcode districts, highest first
Casualties
3,697
1.52 per collision
Fatal collisions
69
78 people killed
Serious collisions
518
661 seriously injured
Collisions in 2025
31
16 in 2024
Casualties in 2025
48
Up 100% on 2024

Road collision statistics for HP18

Collisions by severity, 1979 to 2025

  • Fatal692.8%
  • Serious51821%
  • Slight1,84076%

What the data shows

  • HP18 had 297 collisions from 2016 to 2025, 38% fewer than the 477 from 2006 to 2015.
  • 24% of collisions in HP18 were fatal or serious, against 20% across Great Britain.
  • 320 children under 16 were killed or injured in HP18, 8.8% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 41% of collisions in HP18.

Where HP18 ranks among 2,813 postcode districts

Most collisions
1,554th
Most casualties
1,417th
Most fatal collisions
702nd
Most serious collisions
1,435th

Collisions by day of the week

  • Monday316 (13%)
  • Tuesday348 (14%)
  • Wednesday362 (15%)
  • Thursday390 (16%)
  • Friday360 (15%)
  • Saturday358 (15%)
  • Sunday293 (12%)

Light conditions

  • Daylight1,721 (71%)
  • Dark, no street lighting567 (23%)
  • Dark, street lights lit95 (3.9%)
  • Dark, lighting unknown32 (1.3%)
  • Dark, street lights unlit8 (0.3%)
  • Not recorded4 (0.2%)

Type of road

  • Single carriageway2,130 (88%)
  • Dual carriageway262 (11%)
  • Roundabout14 (0.6%)
  • One way street or slip road6 (0.2%)
  • Not recorded15 (0.6%)

Speed limit at the scene

  • 30 mph413 (17%)
  • 40 mph40 (1.6%)
  • 50 mph36 (1.5%)
  • 60 mph1,705 (70%)
  • 70 mph233 (9.6%)

Weather at the time

  • Fine, no high winds1,913 (79%)
  • Raining, no high winds252 (10%)
  • Fog or mist52 (2.1%)
  • Fine with high winds46 (1.9%)
  • Raining with high winds29 (1.2%)
  • Snowing, no high winds8 (0.3%)
  • Snowing with high winds4 (0.2%)
  • Other104 (4.3%)
  • Not recorded19 (0.8%)

Who was hurt

  • Car occupant2,776 (75%)
  • Motorcyclist337 (9.1%)
  • Van occupant160 (4.3%)
  • Pedestrian126 (3.4%)
  • Cyclist111 (3%)
  • Goods vehicle occupant (over 3.5 tonnes)82 (2.2%)
  • Bus or coach occupant46 (1.2%)
  • Minibus occupant22 (0.6%)
  • Other vehicle occupant20 (0.5%)
  • Taxi or private hire car occupant10 (0.3%)
  • Other6 (0.2%)
  • Not recorded1 (under 0.1%)

Source: Department for Transport, STATS19 road safety data

HP18 road accidents by year

Collisions and casualties in HP18, 1979 to 2025

Collisions in HP18 peaked at 91 in 2006; 2025 had 31.

  • Collisions
  • Collisions in 2025
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253148
20241624
20232943
20222431
20212740
20203451
20193654
20183552
20172746
20163858
20154466
20144477
20133955
20124467
20114163
20103169
20094770
20084569
20075165
200691136
200563102
20046896
200379114
200277115
200177125
200075109
199971102
199882129
199774113
199665101
19955194
199479119
19935599
199280129
19915478
19906493
19895795
19887198
19875176
19865581
19854771
19846294
19835680
19824060
19812944
19803045
19794151

Map of recent crashes in HP18

Map of the 24 most recent crashes in HP18

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

  • 24 crashes
  • Fatal
  • Serious
  • Slight

Recent road crashes in HP18

The 24 most recent collisions in HP18 happened between 31 March and 21 December 2025.

Severity

Crashes by road in HP18

The A41 has the most collisions in HP18, 813 of 2,427 (33%), followed by the B4011 (393).

Collisions in HP18 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA418131,36029176
2ndB401139355112108
3rdM40224340931

Council areas covering HP18

Collisions in HP18 were recorded in 3 council areas. Buckinghamshire has 2,247 of 2,427 (93%).

Collisions in HP18 by council area, 1979 to 2025
RankCouncil areaCollisionsCasualtiesFatalSerious
1stBuckinghamshire2,2473,41464477
2ndCherwell139220434
3rdSouth Oxfordshire416317

Towns in HP18

Collisions in HP18 were recorded in 2 towns, led by Long Crendon (100) and Aylesbury (58).