That's a good question. It's hard to answer definitively.
Obviously, the vehicles are capable of going those speeds. As I alluded to at the beginning, most fatal crashes and severe injuries occur when buses are going at that speed. It's a hard thing to say. It's more of a value judgment as to whether or not a bus.... You're at a higher risk of injuries and fatalities when you're in a bus at that speed. I guess the question is if you're going on that after-school trip, what's the value of the trip versus the relative risk?
Again, as I pointed to at the beginning of the talk, they're still exceedingly safe. The odds of kids and teachers being killed or severely injured in school bus crashes, even on highways or in off hours, are still exceedingly low and much safer than private vehicle transportation. I do need to put that grain of salt in there. If the alternative is now we send 20 children in 20 different cars to that trip, absolutely not, the school bus is 100% going to be the safest way to do that every time.
That being said, the faster it goes, the more likely if something bad happens, there's going to be a worse outcome.