The Remutaka Hill road, connecting Upper Hutt and Wairarapa, is currently closed following a serious two-vehicle crash on State Highway 2. Emergency services report that one individual has sustained serious injuries, while another has moderate injuries as a result of the collision. Authorities are advising motorists to avoid the area and anticipate delays. The New Zealand Transport Agency has indicated that police Serious Crash Unit investigations will be necessary, and the road is expected to remain closed for several hours. Travelers are encouraged to postpone trips or consider alternate routes through Pahiatua Track or Saddle Road.