UPDATE 10am: The road is now open

Emergency services are at the scene of a serious crash on State Highway 1, Dacre, where a car has hit a cow. 

One person has reportedly been seriously injured. 

Police were called to the accident, near the intersection of Dacre Mortons Main Road, about 6.45am. The road is currently closed and a detour is in place.

Motorists are asked to please follow the detour and allow at least an extra 20 minutes' travel time, or avoid the area if possible. 

Eastbound traffic is to use SH1, then turn right onto Dacre-Morton Mains Road. Turn left onto Rimu-Seaward Downs Road and continue along Edendale-Seaward Downs Road, then straight along Seaward Road to SH1 at Edendale. Reverse for Westbound traffic.