Truck jackknifes on M1, blocking lanes

A truck has jackknifed on the Pacific Motorway, causing northbound delays and lane closures.

Emergency services responded to reports of a truck jackknifing at the on-ramp at Currumbin Waters on the Gold Coast about 11.30am.

Police said the incident blocked all northbound lanes of traffic.

Delays were expected, with only one lane open about 3pm as the truck was towed.

The driver of the truck was treated by paramedics, but suffered no injuries.