A serious crash on the M25 anti-clockwise has brought rush-hour traffic to a standstill this morning, with emergency crews working at the scene and drivers warned to expect heavy delays across Hertfordshire and the approaches to London.
Collision details and immediate response
The incident happened shortly after 7am between Junction 17 (Rickmansworth) and Junction 16 (M40). Multiple vehicles were involved, forcing authorities to close lanes to protect crews and casualties.
Three of the four lanes were shut to allow ambulance and fire teams to work safely. Emergency services reached the scene within the hour and are treating at least one injured person.
What National Highways says
National Highways confirmed the lane closures and said recovery teams have been called to remove the vehicles. Their updates stressed safety for the responders and for motorists caught in the disruption.
Officials warned drivers that congestion was severe and that recovery operations may take time to complete.
Traffic knock-on and affected routes
The crash is causing far-reaching disruption beyond the immediate section of the M25. Surrounding junctions and arterial roads are already showing slow traffic.
- Slow-moving vehicles reported between Junction 16 and Junction 15.
- Congestion extending onto the A40 heading towards central London.
- Delays are impacting routes to and from Heathrow Airport during the busy period.
Expected delays and travel advice
Motorists should expect significant extra journey time. National Highways indicated delays of roughly 90 minutes above normal travel times for some routes.
Traffic maps suggest normal flow may not return until late morning. Drivers are advised to:
- Allow extra time or delay non-essential trips.
- Use live traffic apps like Waze or Google Maps for diversions.
- Follow directions from police and roadside signs.
How recovery and clearance are moving forward
Recovery teams are on site arranging to remove the damaged vehicles and clear debris. Crews will only reopen lanes when it is safe.
Authorities said updates will follow as recovery progresses and lanes begin to reopen.
Wider context and related developments
The crash comes amid growing debate on road safety and enforcement. Recent headlines have focused on proposals to tackle dangerous driving and on local council actions against nuisance vehicles.
- New proposals aim to address the most dangerous driving behaviours.
- Councils have stepped up enforcement against abandoned and nuisance vehicles.
- National checks show thousands of drivers still exceed speed limits daily.
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