One person died in the crash. There were no reports of any other injuries, police said.
The road is expected to remain closed for some time.
Two dead, including 12-year-old, in Chch crash
The crash follows a deadly collision early this morning in Christchurch.
Two people - one of them a 12-year-old child - died and a further three people were seriously injured in the crash, which happened at the intersection of Russley and Yaldhurst Rds.
It is understood two of the three seriously hurt are children.