Road works on State Highway 1 could drag out the operation to transport shipping cargo from Northport to Auckland. Police teams stop trucks going south from Whangārei to make sure they're not over the weight limits. Photo: RNZ / Simon Rogers Every hour between 6am to midnight for the next seven days - excluding Sunday - 12 trucks will be taking a load of Christmas cargo from Northport and head south. But there are a number of roadworks taking place on State Highway 1 which could slow things down. National Road Carriers chief executive David Aitken told Morning Report it might be longer than seven days to transport all the goods from the ship