The Waikato expressway has been blocked after a single-vehicle crash this afternoon.
Emergency services were called to the scene near Rangiriri about 1.40pm.
The NZ Transport Agency is warning motorists to expect major delays on the northbound side of the vital roadway and consider taking an alternative route.
According to Google Maps, traffic is currently backed up for nearly 4km.
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There are major delays on the Waikato Expressway after a crash on the northbound lanes. Photo / Google Maps
More to come
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