A portion of the highway at Four-Mile, Ato Market, collapsed last Thursday, stopping heavy trucks from going into Goroka Town.
As of last night, that road has now completely broken off.
Eastern Highlands Provincial Works manager, John Posagu, says since the portion of the road collapsed, attempts were made to fix it but water was building up from the blockage.
He said in fear of water flooding the plains and creating more damages, works officers tried clearing the huge pile of earth that had collapsed but to no avail.