Dramatic footage shows the aftermath of the crash that forced the M4 to close in both directions between Reading and Maidenhead.
A video shared with the Reading Chronicle shows long queues of stationary traffic on the motorway as emergency services respond to the incident.
The footage, filmed from a vehicle caught in the congestion, shows blue lights flashing across the carriageway while an ambulance and a fire engine make their way through traffic towards the crash scene.
Mr Swan who sent in the footage said that the incident happened at 9.30pm on Wednesday night.
He said: "I was on my way home from work and was stuck there a good couple of hours."
Several emergency service personnel can also be seen on the motorway as the response unfolds.
The incident led to the closure of the M4 between Junction 8/9 at Maidenhead and Junction 10 at Reading, with a police collision investigation launched at the scene.
National Highways said the motorway is expected to remain closed throughout the morning rush hour while enquiries continue.
Traffic officers are assisting with the closure, while diversion routes have been put in place for motorists travelling in both directions.
The closure has caused significant disruption across Berkshire, with delays building on alternative routes including the A4, A404(M) and A329(M).
Drivers are being urged to allow extra time for their journeys and follow signed diversion routes.
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