A crash involving a school bus reduced State Highway 1 down to one lane north of Dunedin.
A police spokesman said police were called to the Waikouaiti-Waitati Highway at 3.30pm today following reports of a crash involving a car and bus.
All the passengers were off the bus and had been picked up from the crash site.
There were no significant injuries reported.
State Highway 1 has now reopened after being down to one lane while the road was cleared.
There was frontal damage to the bus.