A multi-vehicle crash has temporarily closed State Highway 1 south of Whangārei.
The crash happened about 1.30pm near Oakleigh and police are diverting traffic around the scene.
Officers had opened one lane about 2pm after heavy traffic started to back up.
About 10 minutes after being alerted to the highway crash police were called to a crash on Rust Ave in central Whangārei after a rubbish truck struck the railway overbridge.