A A$330m development project at Melbourne International Airport has begun, which will see the biggest changes to the airport since it was built in the 1960s.

The project includes an additional 25,000m² of space in the hub’s international terminal as well as a new passenger security and customs processing zone for outbound international passengers, justtheflight.com reports.

While the security zone will be completed in 2010, the expansion project’s work will be carried out over the next five years to minimise disruption to passengers.

The airport will also build a new international passenger zone by 2011, with 10m-high windows that will provide views across the airfield.