Unconnected calls to *555 on Saturday night were because of ''unprecedented demand'', police say.
A Dunedin man who saw a car repeatedly cross the centre line between Middlemarch and Hyde on Saturday night, pulled over to contact police via the *555 service.
He was on hold for 4min 27sec before the call was terminated, and a following call was again cut off after being on hold for 3min 36sec.
View our infographic: Where NZ's crashes happen
Last night, a Police National Headquarters spokesman confirmed that ''Saturday evening was an exceptionally busy period, with unprecedented demand to our communications centres''.