Decision-making is based on human perception in first place, results of statistics might not be present. Motor placement before or under the cab does not have much influence on the results of rollovers. Behind the danger of a rollover, heavy truck on heavy truck accidents are the second most relevant reason for occupant casualties. With a 1980s USA conventional, the result of such accident was: Frame, front axle and wheels would go under the truck in front, while the motor got pushed into the cab (which was very small in a 1980s conventional). Contrary to these real-world results, the motor in front, which would crush the truck driver in an accident, was nonetheless perceived as "protection", and this perception was an important factor for the adoption of these trucks in the US, during the 1980s.