"People who are not wearing a belt risk serious head, neck and upper body injuries even at speeds of 30km/h," said Buric.
The impact in such a collision is the equivalent of falling to the ground from a height of 4m, he added. "With a seatbelt on, the person usually gets off lightly."
In a modern car, properly belted-up drivers and passengers can survive a crash at 64km/h with minimal injury, according to the latest ADAC tests. Those not wearing a belt face severe and in some cases permanent injury.
The ADAC expert said back seat passengers should also take the wearing of seat belts seriously since they would otherwise not only be putting their lives at risk but also those of other car occupants.
When a crash occurs, rear seat occupants could easily be propelled forward and strike the head of the driver or front seat passenger.
-AAP