The earthquake repair bill for roads in Papua New Guinea's Enga, Southern Highlands and Hela provinces is expected to be more than $US12 million, according to PNG's Works Secretary David Wereh.
Mr Wereh told PNG's The National some feeder roads in the provinces were badly damaged, including the Highlands Highway.
Mr Wereh said a number of sections had been damaged and completely destroyed after February's 7.5 magnitude earthquake, resulting in the highway closing down.
He said assessments were made and a Cabinet submission drawn up with an estimated cost breakdown for restoration work coming to around $12.4m.
Last week Prime Minister Peter O'Neill told Parliament total commitments towards the earthquake recovery stood at around $15.5m.