Watch: Dramatic video shows hay bales lorry on M5 in flames
Witness filmed the incident and could feel the "incredible" heat emanating from the vehicle as she was driven past
Dramatic footage shows a lorry stacked with hay bales engulfed in flames.
Up to 40 firefighters attended the scene after thick smoke was seen billowing from the lorry parked on the side of the M5 southbound, near Strensham services in Worcestershire.
Witness Kate Mundy filmed the incident and could feel the "incredible" heat emanating from the vehicle as she was driven past it on Thursday.
Her clip shows the fire taking hold of the vehicle's tyres as smoke pours from the blackened bales.
She said: "As we approached, there were two other lorries with large hay bales that had stopped - three people walking near the fire on their phones.
"The heat was incredible coming from the lorry - petrol on the road."
Five fire engines attended along with a water carrier on Thursday afternoon.
No injuries were reported.
The road has been closed at Junction 7, with one lane reopened to allow traffic to pass through, a spokeswoman for Hereford and Worcester Fire and Rescue Service said.