Dashcam vision has captured the heart-stopping moment an out-of-control truck careered through an Adelaide roundabout, sending concrete rubble flying from its load as it took out power lines and parked cars.

9News spoke exclusively to the truck driver who said he did everything in his power to stop the collision after his brakes failed.

The truck went through the roundabout in Hazelwood Park yesterday evening, causing extensive damage to vehicles and infrastructure, but remarkably no one was injured.

The incident occurred at approximately 6pm on Greenhill Road, known for heavy traffic during peak hours.

Truck driver James Watson said a brake failure was the cause of the incident.

"I'm trying everything in my power. I'm trying to pull the handbrake, I'm trying to shift gears in the tru

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