The incident happened at 14 mile near Koiari Park Primary school in Port Moresby.
Bystanders claimed that the five people were intoxicated with alcohol and sped along the highway before trying to turn a corner and accidentally overturned the vehicle.
Residents nearby rushed to the scene and pushed the car over before it rolled into a shallow drain near the road.
Luckily, all fled the scene alive before police arrived.
The five people are believed to be from Chimbu with the vehicle that belongs to the JKB Construction.