And, I firmly agree with VDC that the PERCEPTION of speed is greatly affected by size. Prove it to yourself, go to a go-cart track. Watch the carts first, they don’t actually go so fast. Then drive one! When you’re five inches away from the pavement…you’re flyin’! Then remember the last airplane flight you took…Did it actually feel like you were going 400 mph ?
The perception of speed really is relative to the size of the vehicle but we rarely re-learn our different vehicle types. This is especialy pertinent to an inexperienced teen who was never really taught the difference in “drivers ed”.