Okay, thank you.
It occurs to me that, depending on the characteristics of the travel, seat belts or other types of restraints might be more justifiable, for instance, when you have a school bus operating at higher speeds in rural conditions versus urban conditions, where traffic is moving at a relatively stable and slow rate, especially in the morning.
Based on your comments, would you suggest that safety belts might be unnecessary in certain applications, that the cost wouldn't be justified by any additional safety?