Truck blocks Lyttelton Tunnel

Motorists are being warned of traffic congestion after a truck blocked one of the lanes in the Lyttelton Tunnel.

Waka Kotahi NZ Transport Agency said a truck breakdown is blocking the northbound lane of the tunnel (State Highway 74).

The breakdown occurred about noon on Friday and there is currently stop/go traffic management in place.

"Road users are advised to expect delays when travelling through the area."