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CrashStats

HP20 road accidents: crash map and statistics

Police recorded 2,367 road traffic collisions in the HP20 postcode district, Buckinghamshire, from 1979 to 2025, and 2,824 people were killed or injured in them. Of those collisions, 30 were fatal and 340 were serious.

In 2025 police recorded 32 collisions, up 3% on 2024 (31).

Collisions since 1979
2,367
1,581st of 2,813 postcode districts, highest first
Casualties
2,824
1.19 per collision
Fatal collisions
30
30 people killed
Serious collisions
340
358 seriously injured
Collisions in 2025
32
Up 3% on 2024
Casualties in 2025
38
Up 3% on 2024

Road collision statistics for HP20

Collisions by severity, 1979 to 2025

  • Fatal301.3%
  • Serious34014%
  • Slight1,99784%

What the data shows

  • HP20 had 319 collisions from 2016 to 2025, 30% fewer than the 455 from 2006 to 2015.
  • 16% of collisions in HP20 were fatal or serious, against 20% across Great Britain.
  • 355 children under 16 were killed or injured in HP20, 13% of the casualties whose age was recorded.
  • The road surface was wet, icy, snowy or flooded in 28% of collisions in HP20.

Where HP20 ranks among 2,813 postcode districts

Most collisions
1,581st
Most casualties
1,720th
Most fatal collisions
1,849th
Most serious collisions
1,907th

Collisions by day of the week

  • Monday354 (15%)
  • Tuesday306 (13%)
  • Wednesday371 (16%)
  • Thursday360 (15%)
  • Friday431 (18%)
  • Saturday355 (15%)
  • Sunday190 (8%)

Light conditions

  • Daylight1,719 (73%)
  • Dark, street lights lit575 (24%)
  • Dark, lighting unknown38 (1.6%)
  • Dark, no street lighting20 (0.8%)
  • Dark, street lights unlit13 (0.5%)
  • Not recorded2 (0.1%)

Type of road

  • Single carriageway1,416 (60%)
  • Roundabout539 (23%)
  • Dual carriageway277 (12%)
  • One way street or slip road127 (5.4%)
  • Not recorded8 (0.3%)

Speed limit at the scene

  • 20 mph3 (0.1%)
  • 30 mph2,254 (95%)
  • 40 mph80 (3.4%)
  • 50 mph2 (0.1%)
  • 60 mph28 (1.2%)

Weather at the time

  • Fine, no high winds1,946 (82%)
  • Raining, no high winds248 (10%)
  • Fine with high winds31 (1.3%)
  • Raining with high winds27 (1.1%)
  • Fog or mist6 (0.3%)
  • Snowing, no high winds4 (0.2%)
  • Snowing with high winds1 (under 0.1%)
  • Other72 (3%)
  • Not recorded32 (1.4%)

Who was hurt

  • Car occupant1,250 (44%)
  • Pedestrian707 (25%)
  • Motorcyclist376 (13%)
  • Cyclist357 (13%)
  • Van occupant42 (1.5%)
  • Taxi or private hire car occupant36 (1.3%)
  • Bus or coach occupant25 (0.9%)
  • Goods vehicle occupant (over 3.5 tonnes)11 (0.4%)
  • Other vehicle occupant8 (0.3%)
  • Minibus occupant5 (0.2%)
  • Other2 (0.1%)
  • Not recorded5 (0.2%)

Source: Department for Transport, STATS19 road safety data

HP20 road accidents by year

Collisions and casualties in HP20, 1979 to 2025

Collisions in HP20 peaked at 72 in 1989; 2025 had 32.

  • Collisions
  • Collisions in 2025: 32
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
20253238
20243137
20233640
20223334
20213032
20202328
20193536
20183747
20172740
20163540
20154749
20143644
20133839
20124452
20115159
20103349
20095675
20084254
20075064
20065871
20053549
20045565
20035764
20025157
20015977
20005065
19996570
19985971
19976989
19964960
19956282
19944957
19936979
19925264
19916174
19906066
19897284
19886578
19876070
19866877
19855869
19846879
19837082
19827080
19816371
19803946
19795871

Map of recent crashes in HP20

Map of the 24 most recent crashes in HP20

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 HP20

The 24 most recent collisions in HP20 happened between 7 April and 23 December 2025.

Severity

Crashes by road in HP20

The A41 has the most collisions in HP20, 849 of 2,367 (36%), followed by the A418 (341).

Collisions in HP20 on each road, 1979 to 2025
RankRoadCollisionsCasualtiesFatalSerious
1stA418491,0219124
2ndA418341428554
3rdA4157299378851
4thA413240269224
5thA4156374026
6thB44434500

Council area for HP20

HP20 is in Buckinghamshire, where police recorded 72,942 collisions from 1979 to 2025. HP20 accounts for 3.2% of them.

Town in HP20

Of the 2,367 collisions in HP20, 2,296 (97%) were in Aylesbury.