Horror Crash Paralyzes M25: Live Updates on Major Motorway Chaos in the UK

M25 Gridlock: Rush Hour crash Causes Severe Delays

September 25, 2025 – 6:30 PM

Commuters on the M25 are experiencing notable disruption This Evening as a result of a traffic incident. The congestion is centered around Junction 21A, near St Albans, Hertfordshire.

Emergency services are currently at the scene,working to clear the obstruction and assist those involved in the collision. The anticlockwise carriageway is partially blocked, leading to substantial backups.

According to real-time traffic data from Inrix, “severe” delays are affecting traffic flow in both directions. Tailbacks now extend all the way to Junction 23, impacting a large stretch of the orbital motorway.

Motorists are strongly advised to avoid the area if possible and seek choice routes. Those who must travel are urged to allow for considerable extra journey time.

Impact on Traffic Flow

The M25 is a critical artery for transportation in and around London, and any disruption can have far-reaching consequences. This incident is already causing ripple effects on surrounding roads as drivers attempt to divert.

Location	Direction	Status	Estimated Delay
J21A (St albans)	Anticlockwise	Partially Blocked	severe – 60+ minutes
Between J21A and J23	Both Directions	Heavy Congestion	30-45 minutes

Did You Know? The M25, completed in 1986, is one of the busiest motorways in Europe, carrying over six million vehicles per week.

Pro Tip: before you travel, always check live traffic updates from sources like Inrix or Google Maps to plan the most efficient route and avoid unexpected delays.

Authorities are working diligently to restore normal traffic conditions as quickly and safely as possible. Further updates will be provided as thay become available. It is indeed expected that standard traffic conditions will return following the completion of the removal of the vehicles involved.

Do you regularly commute on the M25? What are your usual strategies for navigating potential delays?

Have you been affected by this incident? Share your experience in the comments below.

understanding M25 Congestion

The M25 is notorious for congestion, stemming from a combination of factors including high traffic volume, lane closures for roadwork, and, unluckily, accidents. Understanding the causes of the delays can help drivers better prepare.

According to a 2023 report by the RAC Foundation, the M25 experiences an average of 80 hours of delays per vehicle per year, making it the most congested motorway in the UK.

regular road maintenance and advancement projects, while essential for long-term infrastructure health, often contribute to short-term disruption. Staying informed about planned roadworks can definitely help drivers anticipate and avoid potential bottlenecks. National Highways is a valuable resource for information on road closures and improvement schemes.

Frequently Asked Questions about M25 Traffic

• What causes congestion on the M25? Traffic volume,roadworks,and accidents are the primary causes of congestion on the M25.
• Where can I find real-time traffic updates for the M25? Inrix and Google Maps are excellent sources for real-time traffic information.
• Is the M25 always congested? The M25 is one of the busiest motorways in Europe and is frequently congested, notably during peak hours.
• What is being done to improve traffic flow on the M25? National highways is undertaking various projects to improve traffic flow, including smart motorway schemes and capacity enhancements.
• How can I avoid M25 delays? Check traffic conditions before travelling, consider alternative routes, and travel during off-peak hours when possible.

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What is the current estimated delay time on the M25 due to the collision?

Last Updated: 2025-09-25 16:35 BST

The M25 is experiencing significant disruption following a multi-vehicle collision near Junction 21 (M1 interchange) this afternoon. Emergency services are currently on scene, and traffic is at a complete standstill in both directions. This article provides the latest updates, diversion data, and advice for affected motorists. We’ll be continually updating this page as the situation unfolds.

Current Situation: M25 Closure & Delays

As of 16:30 BST, a large section of the M25 is closed. Initial reports indicate a serious incident involving at least four vehicles, including a lorry.Hertfordshire Police are leading the inquiry, and the extent of any injuries is currently unknown.

* Direction: Both clockwise and anti-clockwise carriageways are affected.

* Location: Closures are in place between Junction 20 (Kings Langley) and Junction 22 (London Colney).

* Delays: Traffic is backed up for several miles in both directions. National Highways is reporting delays of at least 90 minutes.

* Emergency Services: Police,fire crews,and ambulance services are all at the scene. An air ambulance was also dispatched.

* Lane Closures: Full road closures are in effect, with no estimated time for reopening.

Diversion Routes & Alternative Travel Options

national Highways has implemented diversion routes, but these are also experiencing heavy congestion.Motorists are strongly advised to avoid the M25 if possible.

diversion for Clockwise Traffic

* Exit at Junction 20 and follow the A41 towards Watford.

* Continue on the A41 to the M1.

* Join the M1 northbound and then rejoin the M25 at Junction 23 (South Mimms).

Diversion for Anti-Clockwise Traffic

* Exit at Junction 22 and follow the A1083 towards St Albans.

* continue on the A1083 to the M1.

* Join the M1 southbound and then rejoin the M25 at Junction 20.

Alternative Travel: Consider using public transport where feasible. Train services from London Euston to Watford Junction and other stations near the affected area might potentially be available. Check National Rail Enquiries for the latest information.

Impact on Local Roads & Surrounding Areas

The M25 closure is having a knock-on effect on local roads around Watford, St Albans, and potters Bar. Roads such as the A41, A1083, and A414 are experiencing substantially increased traffic volumes.Local authorities are working to manage traffic flow, but delays are inevitable.

Witness Accounts & Social Media Updates

Social media is providing real-time updates from motorists caught in the traffic. Many are reporting being stranded for hours.

* Twitter: #M25 #M25Closure #TrafficChaos are trending hashtags.

* Reports: Several drivers have reported a sudden braking maneuver preceding the collision, suggesting a possible contributing factor. (Unconfirmed)

Historical Data: M25 Accidents & Congestion

The M25 is notorious for congestion and accidents.Data from the Department for Transport shows that the M25 experiences a higher-than-average accident rate compared to other motorways in the UK. Factors contributing to this include:

* High Traffic Volume: The M25 is one of the busiest motorways in Europe.

* Complex Junctions: Many junctions are complex and require careful navigation.

* Weather Conditions: Adverse weather conditions can significantly increase the risk of accidents.

* Driver Behavior: Speeding, tailgating, and distracted driving are common contributing factors.

Case Study: 2022 M25 Fuel Protest Disruption: In September 2022, the M25 experienced widespread disruption due to fuel protests, highlighting the motorway’s vulnerability to large-scale incidents. This event caused similar levels of chaos and delays as the current situation.

Safety Advice for Motorists

* Check Traffic Conditions: Before travelling,check the latest traffic conditions using National Highways’ website or app.

* Allow Extra Time: If you must travel near the M25, allow significantly extra time for your journey.

* Drive Carefully: drive cautiously and be aware of the potential for sudden braking or changes in traffic flow.

* Stay Informed: Monitor traffic updates via radio, social media, or online news sources.

* Emergency Kit: Ensure your vehicle is equipped with an emergency kit, including water, snacks, a blanket, and a mobile phone charger.

Resources & Further Information

* National highways: https://www.nationalhighways.co.uk/

* Hertfordshire Police: https://www.hertspolice.uk/

* National Rail enquiries: https://www.nationalrail.co.uk/

* **Live