State Highway 1 has opened again more than five hours after it was closed when a truck rolled near Hampton Downs shortly before 2pm.

NZTA said the incident occurred just south of Hampton Downs about 2pm and the road was closed in both directions.

A crane had to brought in to remove the truck.

Southbound traffic had to exit at Hampton Downs, then go on to Whangamarino Rd, then Paddy Rd then back on to SH1. Northbound traffic had to do the reverse.

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A police spokesperson said the driver sustained minor to moderate injuries.