Difference in Rollover Frequency between Chevrolet and GMC Trucks

摘要

The rollover experience in single vehicle accident data was compared forcorporate twins: Chevrolet and the corresponding GMC pickup trucks. Chevrolet trucks showed higher rollover proportions than GMC trucks. A number of driver and environmental factors were examined; some showed statistically significant differences between the two makes. A statistical model was developed to control for such differences. Still, a statistically significant difference in rollover proportions remained. The magnitude of this difference is comparable to the effect of the difference between dry and wet pavement, the difference between skidding or not skidding, or a difference of 20 years in driver age. It is 10 percent of the difference in rollover proportion between urban and rural environments.