A local leader, Wako Napasu told Loop PNG a landslide occurred on Saturday during heavy rains in the area.
Napasu and local elders fear that if nothing is done within the next 48 hours, the road will collapse.
He said the affected section of the road is two kilometres from Nebilyer bridge and 8 kilometres from Tambul government station
If the road collapses, this will impact the multimillion kina ADB funded construction work along the highway by contactor COVEC and subcontractor Makara Constructions.