This is the nerve-wracking moment a cement mixer collided with a car transporter, causing it to burst into flames.

Dashcam footage shows the truck swerving across the centre line after it was unable to avoid the oncoming white lorry in Luhansk Oblast, Ukraine.

The mixer can be seen attempting to veer out of the way but still striking the front side of the car carrier on August 13.

The impact caused an instant fire, engulfing the transporter's cabin, while the other lorry slammed into a road guardrail and a passing passenger car before coming to a stop.

A family driving behind the heavy goods vehicle immediately halted, coming within inches of the burning truck.

The quick-thinking car driver then reversed while his frantic partner screamed in fear.

Seeing that the trucker was in danger, the man stepped out of his car and sprinted toward the vehicle to help the worker.

In another clip, the transporter carrying eight foreign-made vehicles emitted massive flames and thick black smoke. By the time firefighters arrived, all of the vehicles had been destroyed.

Local media reported that both drivers were injured but are currently recovering. The cement mixer driver suffered multiple fractures and was taken to hospital for immediate treatment.