Emergency services are responding to a serious two-vehicle crash that has closed the Saddle Rd between Ashhurst and Woodville.
Police were called to the crash near the Hope Road intersection about 11.10am on Monday.
A police spokesperson said the serious crash unit had been advised and initial indications suggested there were injuries.
A Fire and Emergency spokesman said they had responded with three fire trucks.
NZTA said a detour was expected to add 30 minutes to travel times.