Serious Audi Q5 and Triumph Bonneville crash on the A404 - 16 Aug 2025
Accident reference 2025411631153
Accident summary
On Saturday 16 August 2025 at 12:05 a serious collision occurred near A404 involving 2 vehicles (triumph bonneville, audi q5) and 1 casualty (1 serious) Weather at the time was recorded as fine no high winds. Road surface conditions were dry. Lighting was described as daylight. A police officer attended the scene.
Key details
- Posted speed limit: 40 mph
- Road type: Single carriageway
- Junction: T or staggered junction
- Setting: Urban
Location
Live road closures near here
Accidents, closures and roadworks within 10 km reported right now by National Highways and Traffic Wales.
Checking for live closures nearby…
Collision records on this page come from the Department for Transport's STATS19 data, which is published once a year, so a crash from today will not appear in the historical data yet. For today's incidents, check live A404 closures today.
Move Insights
Thinking of moving to this area?
Check flood risk, planning history, EPC ratings and more with a Move Insights property report.
Basic Information
| Accident Reference | 2025411631153 |
| Police Reference | 411631153 |
| Date & Time |
Saturday
|
| Severity | Serious |
| Vehicles Involved | 2 |
| Casualties | 1 |
| Police Force | Hertfordshire |
| Police Officer Attended | Yes |
Road & Location Details
| Area Type | Urban |
| First Road | A404 |
| Second Road | Unclassified road |
| Road Type | Single carriageway |
| Speed Limit | 40 mph |
| Trunk Road | Yes |
| Highway Authority | E10000015 |
| Current Highway Authority | E10000015 |
| LSOA Code | E01023813 |
Junction Information
| Junction Detail | T or staggered junction |
| Junction Control | Give way or uncontrolled |
Environmental Conditions
| Light Conditions | Daylight |
| Weather Conditions | Fine no high winds |
| Road Surface Conditions | Dry |
| Carriageway Hazards | None |
Enhanced Collision Data
| Injury Based Classification | Yes |
| Adjusted Serious Casualties | 1 |
| Adjusted Slight Casualties | 0 |
Nearby or similar collisions
Explore other recorded collisions from the same authority area to understand the wider pattern of incidents nearby.
Accident 2025411630795
SlightAccident 2025411633801
SlightAccident 2025411637159
SlightAccident 2025411636690
SlightAccident 2025411623747
SeriousAccident 2025411639094
SlightVehicles (2)
Vehicle 2
Vehicle Information
| Type | Motorcycle over 500cc |
| Make/Model | TRIUMPH BONNEVILLE |
| Engine Capacity | 1200cc |
| Fuel Type | Petrol |
| Left Hand Drive | Yes |
| Manoeuvre | Going ahead |
Driver Information
| Age | 62 |
| Sex | Male |
| Journey Purpose | Not known |
| IMD Decile | 10 (1=most deprived, 10=least deprived) |
Vehicle 1
Vehicle Information
| Type | Car |
| Make/Model | AUDI Q5 |
| Engine Capacity | 1984cc |
| Fuel Type | Petrol |
| Left Hand Drive | Yes |
| Manoeuvre | Turning right |
Driver Information
| Age | 40 |
| Sex | Female |
| Journey Purpose | Not known |
| IMD Decile | 6 (1=most deprived, 10=least deprived) |
Casualties (1)
Casualty 1
Basic Information
| Class | Driver or rider |
| Severity | Serious |
| Type | Motorcycle over 500cc rider or passenger |
| Age | 62 |
| Sex | Male |
| Associated Vehicle | Vehicle 2 |
Additional Details
| IMD Decile | 10 (1=most deprived, 10=least deprived) |
Quick Actions
Hotspots linked to this collision
Data Source
This data is from the UK Department for Transport's STATS19 road safety dataset, available under the Open Government Licence v3.0.