The limousine, sports car, and the school bus are going around the speed limit of 55 mph, while the ambulance and the trains are going far too fast. And I don't know how the train would be on the highway.
Limousine = 53 mph
Sports car = 54 mph
Ambulance = 75 mph
School bus = 54 mph
Train = 91 mph
Limousine, sports car, and school bus are the correct answers.