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Road collisions in Buckinghamshire
Police recorded 3,313 road collisions involving injury in Buckinghamshire between 2021 and 2025, about 663 a year. 58 of them were fatal, and an estimated 706 involved serious injury once DfT's severity adjustment is applied. These are reported injury collisions only: damage-only incidents and unreported injuries are not included.
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When collisions happen
The busiest hour was 4pm to 5pm, and 34% of collisions happened between 3pm and 7pm (higher than the 32% across Great Britain). Thursday had the most collisions, and 24% happened at weekends.
Trend over time
Reported collisions went from 637 in 2021 to 684 in 2025, a rise of 7%. Counts are affected by traffic levels, population and changes in how police record injuries, so Buckinghamshire should not be ranked against other areas on these numbers alone.
Who is affected
Across Buckinghamshire, 4,193 people were injured or killed in these collisions. Pedestrians were 13% of casualties (14% across Great Britain), pedal cyclists 9% (12%) and motorcyclists 12% (12%). Car and taxi occupants made up 60%. 12 of the pedestrians were killed.
Children aged 0 to 15 were 8% of casualties, lower than the 9% national share. People aged 16 to 25 were 21% (21% nationally), and people over 65 were 10% (10% nationally).
| Road user | Casualties | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Pedestrians | 561 | 13.4% | 14.5% |
| Pedal cyclists | 386 | 9.2% | 11.9% |
| Motorcyclists | 506 | 12.1% | 12.4% |
| Car and taxi occupants | 2,505 | 59.7% | 54.4% |
| Bus and minibus occupants | 26 | 0.6% | 1.8% |
| Van and goods vehicle occupants | 159 | 3.8% | 3.5% |
| Other road users | 50 | 1.2% | 1.6% |
Casualties by age
| Age | Casualties | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| 0 to 5 | 59 | 1.4% | 1.6% |
| 6 to 10 | 99 | 2.4% | 2.6% |
| 11 to 15 | 166 | 4.0% | 4.8% |
| 16 to 20 | 426 | 10.3% | 10.6% |
| 21 to 25 | 435 | 10.5% | 11.0% |
| 26 to 35 | 898 | 21.6% | 20.8% |
| 36 to 45 | 715 | 17.2% | 15.8% |
| 46 to 55 | 556 | 13.4% | 12.8% |
| 56 to 65 | 387 | 9.3% | 10.1% |
| 66 to 75 | 233 | 5.6% | 5.3% |
| Over 75 | 178 | 4.3% | 4.5% |
Vehicles involved
16.2% of collisions involved a pedestrian casualty (17.7% nationally), 11.5% a cyclist (15.0%) and 15.0% a motorcyclist (15.3%). 4.9% involved a goods vehicle (3.9% nationally) and 20.6% involved a driver aged 17 to 24 (21.1%). 37 collisions involved an e-scooter.
| Vehicle | Vehicles | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Cars and taxis | 4,563 | 73.7% | 69.7% |
| Vans (up to 3.5 tonnes) | 395 | 6.4% | 6.4% |
| Heavy goods vehicles | 174 | 2.8% | 2.3% |
| Motorcycles | 522 | 8.4% | 9.3% |
| Pedal cycles | 393 | 6.3% | 8.7% |
| Buses and minibuses | 56 | 0.9% | 1.8% |
| Other vehicles | 90 | 1.5% | 1.8% |
Collision hotspots in Buckinghamshire
These are the 100 metre squares with the most reported collisions in 2021 to 2025. Location is the average position of the collisions in each square, so treat it as approximate.
| # | Where | Junction type | Collisions | Fatal | Map |
|---|---|---|---|---|---|
| 1 | Bicester Road (A41) | Not at a junction | 21 | 0 | View on map |
| 2 | Uxbridge Road (A412) | T or staggered junction | 15 | 0 | View on map |
| 3 | Buckingham Road (A413) | Roundabout | 14 | 0 | View on map |
| 4 | M25 | Not at a junction | 13 | 0 | View on map |
| 5 | Oxford Road (A41) | Roundabout | 10 | 0 | View on map |
| 6 | Desborough Avenue | Roundabout | 9 | 0 | View on map |
| 7 | M40 | Roundabout | 8 | 0 | View on map |
| 8 | Stoke Road (B416) | T or staggered junction | 8 | 0 | View on map |
| 9 | Great Western Street | Not at a junction | 7 | 1 | View on map |
| 10 | Friarage Road (A41) | Crossroads | 7 | 0 | View on map |
| 11 | Buckingham Road (A413) | Crossroads | 7 | 0 | View on map |
| 12 | Marlow Hill (A40) | Roundabout | 7 | 0 | View on map |
| 13 | New Street (A413) | Roundabout | 7 | 0 | View on map |
| 14 | Newton Road | Crossroads | 7 | 0 | View on map |
| 15 | New Street (A413) | T or staggered junction | 6 | 1 | View on map |
| 16 | London Road (A40) | Private drive or entrance | 6 | 0 | View on map |
| 17 | Oxford Road (A418) | T or staggered junction | 6 | 0 | View on map |
| 18 | Totteridge Road | Not at a junction | 6 | 0 | View on map |
| 19 | West Wycombe Road (A40) | Private drive or entrance | 6 | 0 | View on map |
| 20 | M25 | Not at a junction | 6 | 0 | View on map |
| 21 | Bridge Street | Not at a junction | 6 | 0 | View on map |
| 22 | Park Street (A41) | Roundabout | 6 | 0 | View on map |
| 23 | New Road (A4010) | Roundabout | 6 | 0 | View on map |
| 24 | Desborough Avenue | Roundabout | 6 | 0 | View on map |
| 25 | Douglas Road (A4157) | Crossroads | 6 | 0 | View on map |
Roads and streets with the most collisions
Each collision is matched to the nearest named road. Long roads and busy town centres collect the most, so this list shows where collisions are recorded, not which streets are riskiest.
| Road or street | Collisions | Fatal | Serious (est.) |
|---|---|---|---|
| Oxford Road | 99 | 3 | 27 |
| London Road | 75 | 3 | 13 |
| Amersham Road | 69 | 2 | 14 |
| High Street | 55 | 0 | 11 |
| Aylesbury Road | 45 | 1 | 13 |
| Bicester Road | 44 | 0 | 7 |
| Wendover Road | 39 | 0 | 7 |
| Wycombe Road | 37 | 1 | 11 |
| Marlow Road | 34 | 0 | 11 |
| Uxbridge Road | 32 | 1 | 7 |
| West Wycombe Road | 30 | 0 | 7 |
| Stoke Road | 27 | 0 | 3 |
| New Road | 26 | 0 | 4 |
| Desborough Avenue | 26 | 0 | 1 |
| Tring Road | 25 | 0 | 5 |
Numbered roads with the most collisions
57% of collisions happened on roads with a 30 mph limit or lower (69% nationally), and 29% on roads with a 60 or 70 mph limit (18% nationally). 52% were at or within 20 metres of a junction or roundabout, lower than the national 54%.
| Road | Collisions | Fatal | Serious (est.) |
|---|---|---|---|
| A40 | 242 | 8 | 46 |
| A413 | 209 | 7 | 41 |
| A41 | 177 | 3 | 43 |
| M25 | 134 | 0 | 19 |
| M40 | 132 | 8 | 31 |
| A404 | 131 | 3 | 23 |
| A418 | 99 | 1 | 27 |
| A4010 | 82 | 0 | 15 |
| A412 | 64 | 1 | 18 |
| A416 | 57 | 0 | 8 |
| A355 | 51 | 2 | 10 |
| A4128 | 47 | 1 | 14 |
| A421 | 40 | 3 | 11 |
| B416 | 35 | 4 | 8 |
| A4155 | 34 | 0 | 10 |
Only numbered roads are listed here. Named streets are in the table above.
Conditions
27% of collisions in Buckinghamshire happened in darkness, close to the 28% across Great Britain. 49% happened on roads classed as urban, lower than the national 67%.
Type of road
| Type of road | Collisions | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Motorway | 274 | 8.3% | 3.0% |
| A(M) road | 0 | 0.0% | 0.2% |
| A road | 1,409 | 42.5% | 44.0% |
| B road | 253 | 7.6% | 12.5% |
| C road | 490 | 14.8% | 4.4% |
| Unclassified road | 887 | 26.8% | 35.9% |
Speed limit
| Speed limit | Collisions | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| 20 mph | 2 | 0.1% | 17.1% |
| 30 mph | 1,885 | 56.9% | 52.0% |
| 40 mph | 310 | 9.4% | 8.7% |
| 50 mph | 146 | 4.4% | 4.4% |
| 60 mph | 638 | 19.3% | 12.2% |
| 70 mph | 332 | 10.0% | 5.5% |
Junctions
| Junctions | Collisions | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Not at a junction | 1,599 | 48.3% | 45.9% |
| T or staggered junction | 879 | 26.6% | 28.5% |
| Crossroads | 149 | 4.5% | 9.5% |
| Junction with more than four arms | 11 | 0.3% | 1.6% |
| Private drive or entrance | 248 | 7.5% | 2.2% |
| Other junction | 7 | 0.2% | 6.1% |
| Roundabout | 415 | 12.5% | 6.2% |
Light conditions
| Light conditions | Collisions | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Daylight | 2,408 | 72.7% | 71.7% |
| Darkness, street lights lit | 526 | 15.9% | 20.6% |
| Darkness, street lights unlit | 28 | 0.8% | 0.7% |
| Darkness, no street lighting | 264 | 8.0% | 5.3% |
| Darkness, lighting unknown | 87 | 2.6% | 1.7% |
Urban or rural
| Urban or rural | Collisions | Share in Buckinghamshire | Share across GB |
|---|---|---|---|
| Urban | 1,611 | 48.6% | 67.2% |
| Rural | 1,702 | 51.4% | 32.8% |
About these figures
Only collisions involving injury that were reported to the police are counted. The figures are not adjusted for traffic volume or population, so they should not be used to rank areas against each other. Serious and slight splits use the Department for Transport's severity adjustment. Full explanation.