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CrashStats

A4157 accidents: crash map and statistics

Police recorded 437 collisions on the A4157 from 1979 to 2025, with 542 casualties. Of those crashes, 12 were fatal and 65 serious, and 12 people were killed.

In 2025 there were 5 collisions on the A4157, down 29% from 7 in 2024, with 6 casualties.

Collisions since 1979
437
2,162nd highest of 4,923 roads
Casualties
542
1.24 per collision
Fatal collisions
12
12 people killed
Serious collisions
65
68 seriously injured
Collisions in 2025
5
Down 29% on 2024
Casualties in 2025
6
Down 33% on 2024

Crash severity on the A4157

On the A4157, 2.7% of collisions were fatal and 15% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal122.7%
  • Serious6515%
  • Slight36082%

Where the A4157 ranks among 4,923 roads

Most collisions
2,162nd
Most casualties
2,299th
Most fatal collisions
1,505th
Most serious collisions
2,586th

A4157 accidents by year

Collisions on the A4157 peaked at 21 in 1989 and were down to 5 in 2025.

Collisions and casualties on the A4157, 1979 to 2025

  • Collisions
  • Collisions in 2025: 5
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202556
202479
202379
20221011
202156
202036
201955
201855
201746
201666
201544
201469
201355
201257
2011810
2010610
20091218
2008811
2007813
200678
200545
20041014
200378
2002910
2001811
2000912
19991013
1998911
19971118
19961014
1995911
19941111
19932023
199258
19911013
19901212
19892126
19881215
19871314
19861113
19851621
19841214
19831719
19822021
19811618
19801418
197955

When crashes happen on the A4157

Friday has the most collisions on the A4157 (83), and 3pm to 6pm is the busiest time of day (136).

Collisions by day of the week

  • Monday75 (17%)
  • Tuesday63 (14%)
  • Wednesday72 (16%)
  • Thursday61 (14%)
  • Friday83 (19%)
  • Saturday48 (11%)
  • Sunday35 (8%)

Collisions by time of day

  • Midnight to 3am9 (2.1%)
  • 3am to 6am4 (0.9%)
  • 6am to 9am69 (16%)
  • 9am to noon54 (12%)
  • Noon to 3pm58 (13%)
  • 3pm to 6pm136 (31%)
  • 6pm to 9pm75 (17%)
  • 9pm to midnight32 (7.3%)

Collisions by month

  • January49 (11%)
  • February27 (6.2%)
  • March34 (7.8%)
  • April36 (8.2%)
  • May37 (8.5%)
  • June39 (8.9%)
  • July27 (6.2%)
  • August34 (7.8%)
  • September38 (8.7%)
  • October47 (11%)
  • November31 (7.1%)
  • December38 (8.7%)

Light conditions at the time

  • Daylight315 (72%)
  • Dark, street lights lit113 (26%)
  • Dark, lighting unknown6 (1.4%)
  • Dark, no street lighting1 (0.2%)
  • Dark, street lights unlit1 (0.2%)
  • Not recorded1 (0.2%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in A4157 crashes

On the A4157, 88% of collisions happened where the speed limit was 30 mph and 70% on a dry road surface.

Speed limit at the scene

  • 20 mph1 (0.2%)
  • 30 mph386 (88%)
  • 40 mph48 (11%)
  • 60 mph2 (0.5%)

Weather at the time

  • Fine, no high winds356 (81%)
  • Raining, no high winds43 (9.8%)
  • Raining with high winds10 (2.3%)
  • Fine with high winds9 (2.1%)
  • Other16 (3.7%)
  • Not recorded3 (0.7%)

Road surface

  • Dry307 (70%)
  • Wet or damp126 (29%)
  • Snow2 (0.5%)
  • Frost or ice1 (0.2%)
  • Not recorded1 (0.2%)

Type of road

  • Single carriageway407 (93%)
  • Dual carriageway28 (6.4%)
  • Roundabout1 (0.2%)
  • Not recorded1 (0.2%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in A4157 crashes

Car occupants make up 51% of the people killed or injured on the A4157, followed by pedestrians (18%).

Casualties by road user

  • Car occupant274 (51%)
  • Pedestrian97 (18%)
  • Motorcyclist78 (14%)
  • Cyclist72 (13%)
  • Van occupant12 (2.2%)
  • Taxi or private hire car occupant4 (0.7%)
  • Other2 (0.4%)
  • Not recorded3 (0.6%)

Vehicles involved

  • Car612 (72%)
  • Motorcycle77 (9%)
  • Pedal cycle73 (8.6%)
  • Van or goods vehicle up to 3.5 tonnes33 (3.9%)
  • Goods vehicle over 3.5 tonnes27 (3.2%)
  • Taxi or private hire car13 (1.5%)
  • Other16 (1.9%)
  • Not recorded1 (0.1%)

Casualties by age

  • 0 to 513 (2.4%)
  • 6 to 1022 (4.1%)
  • 11 to 1551 (9.4%)
  • 16 to 20103 (19%)
  • 21 to 2567 (12%)
  • 26 to 3596 (18%)
  • 36 to 4554 (10%)
  • 46 to 5547 (8.7%)
  • 56 to 6546 (8.5%)
  • 66 to 7515 (2.8%)
  • Over 7522 (4.1%)
  • Not recorded6 (1.1%)

Drivers, passengers and pedestrians

  • Driver or rider358 (66%)
  • Pedestrian97 (18%)
  • Passenger87 (16%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the A4157

Map of the 25 most recent crashes on the A4157

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

  • 25 crashes
  • Fatal
  • Serious
  • Slight

A4157 crashes by council area

All 437 collisions on the A4157 were in Buckinghamshire.

Collisions on the A4157 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stBuckinghamshire4375421265

A4157 crashes by town

Of the 437 collisions on the A4157, 399 were in the built-up area of Aylesbury.

Recent crashes on the A4157

These are the 25 most recent collisions on the A4157, from 8 June 2022 to 28 November 2025.

Severity