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CrashStats

B4012 accidents: crash map and statistics

Police recorded 229 collisions on the B4012 from 1979 to 2025, with 334 casualties. Of those crashes, 11 were fatal and 55 serious, and 12 people were killed.

In 2025 there was 1 collision on the B4012, down 50% from 2 in 2024, with 1 casualty.

Collisions since 1979
229
3,065th highest of 4,923 roads
Casualties
334
1.46 per collision
Fatal collisions
11
12 people killed
Serious collisions
55
73 seriously injured
Collisions in 2025
1
Down 50% on 2024
Casualties in 2025
1
Down 83% on 2024

Crash severity on the B4012

On the B4012, 4.8% of collisions were fatal and 24% serious, against 1.6% and 18% across Great Britain.

Collisions by severity, 1979 to 2025

  • Fatal114.8%
  • Serious5524%
  • Slight16371%

Where the B4012 ranks among 4,923 roads

Most collisions
3,065th
Most casualties
2,975th
Most fatal collisions
1,595th
Most serious collisions
2,827th

B4012 accidents by year

Collisions on the B4012 peaked at 12 in 1997 and were down to 1 in 2025.

Collisions and casualties on the B4012, 1979 to 2025

  • Collisions
  • Collisions in 2025: 1
  • Casualties

Source: Department for Transport, STATS19 road safety data

View as a table
YearCollisionsCasualties
202511
202426
202311
202244
202100
202011
201911
201833
201722
201614
201511
201425
201323
201247
201100
201067
200944
200834
200758
200645
200523
200445
200334
2002912
20011112
2000810
19991011
1998710
19971221
1996611
1995915
1994917
19931014
1992815
1991915
199022
198967
198878
1987611
198655
198522
19841012
198311
198247
1981813
1980716
197978

When crashes happen on the B4012

Wednesday has the most collisions on the B4012 (40), and 3pm to 6pm is the busiest time of day (48).

Collisions by day of the week

  • Monday34 (15%)
  • Tuesday29 (13%)
  • Wednesday40 (17%)
  • Thursday34 (15%)
  • Friday38 (17%)
  • Saturday32 (14%)
  • Sunday22 (9.6%)

Collisions by time of day

  • Midnight to 3am14 (6.1%)
  • 3am to 6am4 (1.7%)
  • 6am to 9am44 (19%)
  • 9am to noon26 (11%)
  • Noon to 3pm40 (17%)
  • 3pm to 6pm48 (21%)
  • 6pm to 9pm34 (15%)
  • 9pm to midnight19 (8.3%)

Collisions by month

  • January20 (8.7%)
  • February21 (9.2%)
  • March13 (5.7%)
  • April20 (8.7%)
  • May22 (9.6%)
  • June13 (5.7%)
  • July19 (8.3%)
  • August20 (8.7%)
  • September15 (6.6%)
  • October25 (11%)
  • November23 (10%)
  • December18 (7.9%)

Light conditions at the time

  • Daylight163 (71%)
  • Dark, no street lighting50 (22%)
  • Dark, street lights lit15 (6.6%)
  • Dark, street lights unlit1 (0.4%)

Source: Department for Transport, STATS19 road safety data

Road and weather conditions in B4012 crashes

On the B4012, 60% of collisions happened where the speed limit was 60 mph and 53% on a dry road surface.

Speed limit at the scene

  • 30 mph48 (21%)
  • 40 mph5 (2.2%)
  • 50 mph39 (17%)
  • 60 mph137 (60%)

Weather at the time

  • Fine, no high winds172 (75%)
  • Raining, no high winds33 (14%)
  • Fog or mist8 (3.5%)
  • Raining with high winds5 (2.2%)
  • Other10 (4.4%)
  • Not recorded1 (0.4%)

Road surface

  • Dry122 (53%)
  • Wet or damp97 (42%)
  • Frost or ice9 (3.9%)
  • Snow1 (0.4%)

Type of road

  • Single carriageway210 (92%)
  • Roundabout16 (7%)
  • Dual carriageway3 (1.3%)

Source: Department for Transport, STATS19 road safety data

People hurt and vehicles involved in B4012 crashes

Car occupants make up 76% of the people killed or injured on the B4012, followed by motorcyclists (12%).

Casualties by road user

  • Car occupant253 (76%)
  • Motorcyclist39 (12%)
  • Cyclist11 (3.3%)
  • Van occupant10 (3%)
  • Pedestrian9 (2.7%)
  • Goods vehicle occupant (over 3.5 tonnes)4 (1.2%)
  • Other vehicle occupant3 (0.9%)
  • Other5 (1.5%)

Vehicles involved

  • Car295 (77%)
  • Motorcycle39 (10%)
  • Van or goods vehicle up to 3.5 tonnes18 (4.7%)
  • Pedal cycle13 (3.4%)
  • Goods vehicle over 3.5 tonnes10 (2.6%)
  • Other vehicle3 (0.8%)
  • Other5 (1.3%)
  • Not recorded1 (0.3%)

Casualties by age

  • 0 to 53 (0.9%)
  • 6 to 102 (0.6%)
  • 11 to 1512 (3.6%)
  • 16 to 2061 (18%)
  • 21 to 2557 (17%)
  • 26 to 3580 (24%)
  • 36 to 4538 (11%)
  • 46 to 5528 (8.4%)
  • 56 to 6521 (6.3%)
  • 66 to 7516 (4.8%)
  • Over 7510 (3%)
  • Not recorded6 (1.8%)

Drivers, passengers and pedestrians

  • Driver or rider251 (75%)
  • Passenger74 (22%)
  • Pedestrian9 (2.7%)

Source: Department for Transport, STATS19 road safety data

Map of recent crashes on the B4012

Map of the 25 most recent crashes on the B4012

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

  • 25 crashes
  • Serious
  • Slight

B4012 crashes by council area

All 229 collisions on the B4012 were in South Oxfordshire.

Collisions on the B4012 in each area, 1979 to 2025
RankAreaCollisionsCasualtiesFatalSerious
1stSouth Oxfordshire2293341155

B4012 crashes by town

Of the 229 collisions on the B4012, 61 were in the built-up area of Thame.

Recent crashes on the B4012

These are the 25 most recent collisions on the B4012, from 7 January 2012 to 31 May 2025.

Severity