Tuesday, 17 February 2026 — A serious road traffic collision on the M4 motorway in Berkshire has caused lengthy delays and heavy congestion, with motorists facing extended queues on one of southern England’s busiest routes. Emergency services were called to the scene earlier today after reports of a crash on a high-volume stretch of the motorway, prompting lane restrictions and traffic controls. The WP Times reports, citing police updates and information shared by local traffic monitoring channels on Facebook.
According to initial statements from the police, the collision occurred during a period of steady daytime traffic, quickly leading to stop-start conditions as officers secured the area and recovery teams began work. Drivers approaching the affected section reported delays building within minutes, with congestion stretching back several miles.
Traffic officers implemented lane closures to allow emergency crews safe access to the scene. Images and eyewitness updates circulating on Facebook showed stationary traffic and flashing emergency lights as police managed the flow of vehicles past the incident. Highways teams were also deployed to assist with signage and diversion advice. By mid-morning, congestion had intensified. Live traffic feeds indicated delays of up to 30–40 minutes at peak points, particularly for drivers joining the motorway from nearby junctions. Commuters and delivery drivers described frustration as alternative routes quickly became congested, pushing more vehicles back towards the motorway.
Police have not yet released full details about the number of vehicles involved or the extent of any injuries. In a brief update, officers confirmed that the incident was being treated as serious and that recovery operations would take time, urging drivers to remain patient and avoid the area if possible.
The M4 is a critical east–west artery, linking London with South Wales and carrying heavy commuter, freight and long-distance traffic. Even short-term disruption on this route often has wider knock-on effects, slowing connecting A-roads and nearby urban routes as drivers attempt to divert around blockages. Local businesses and logistics operators also reported delays, with delivery schedules affected as queues continued to build. Traffic analysts noted that incidents during daylight hours can be particularly disruptive, as volumes remain consistently high rather than peaking briefly during rush hour.
As the afternoon progressed, traffic continued to move at reduced speeds. Lane restrictions remained in place near the crash site while damaged vehicles were removed and debris cleared from the carriageway. Police officers were seen directing traffic and coordinating with highways staff to gradually ease congestion.
Authorities advised motorists to check live traffic updates, allow extra journey time and follow official guidance rather than relying solely on satellite navigation apps, which can redirect large volumes of traffic onto unsuitable local roads. Investigations into the cause of the collision are expected to continue once the motorway is fully reopened. Police have indicated that further information will be released if appropriate. For now, drivers using the M4 through Berkshire are being warned to expect continued disruption until all lanes are fully restored and traffic returns to normal flow.
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