THE moment a loaded B-double cattle truck toppled over at the top of the Toowoomba Range has been caught on dash cam.

Footage shows the truck travelling in the right-hand lane headed east on James St towards the turn into Cohoe St.

It passes a number of vehicles in the left-hand lane and approaches the turn, almost navigating the bend when it begins to topple.

The rear trailer is the first to over-balance with the tyres leaving the bitumen before it falls into the oncoming lanes of traffic.

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The smaller trailer at the front of the configuration soon follows.

The traffic crash closed the busy road for more than six hours and triggered a hunt for loose cattle, eight of which remain unaccounted for.

The truck driver did not require treatment at hospital.

Police investigations into the crash are continuing.