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The Papua New Guinea Department of Transport & Infrastructure is responsible for transport infrastructure policy and planning. It is the lead agency in formulation of policies and planning of transport infrastructure projects, administers transport legislation's (Act, associated Regulations and numerous international conventions etc) and ensuring compliance to safety, security and related environmental standards.

The Department‘s core functions is to provide transport policy, strategy and planning advice across all three modes of transport, co-ordinate and monitor implementation of Government policies, strategies and plans for the three modes, administer relevant legislation for all three modes, monitor and ensure the effective execution of delegated authorities and legislation implemented by other transport sector bodies.

The Department is the lead agency in the sector and works side by side with other transport sectors in the development and upkeep of infrastructures which are:

  1. Department of Works & Implementation - responsible for or building/implementing transport infrastructure projects (roads & bridges)
  2. Civil Aviation Safety Authority - responsible for the aviation industry operations
  3. National Maritime Safety Authority - responsible for marine regulations and navigational aids
  4. PNG Ports - responsible for ports
  5. National Roads Authority - responsible for road maintenance and
  6. National Road Safety Council - responsible for road safety.

PNG has a diverse transport national infrastructure across (the three modes):

Land: 8600 KM of National roads,  latest report from NRA shows 8950 km of National Roads NRA ) and 22,000 KM of Provincial Roads .

Sea: 16 Major Sea Ports; and

Air: 46 Airports (22 national airports maintained by CASA) and about 450 Airstrips