Crashes in Huntly and Papakura are causing delays on a day when heavy holiday traffic flows are expected to cause widespread traffic congestion.
NZ Transport Agency tweeted just before 2pm that a crash in Huntly has blocked State Highway 1 in both directions, with emergency services now on site.
Another crash under the Beach Rd overbridge blocked the northbound lane under the bridge just before 12.30pm, causing heavy congestion back to Ramarama.