On freeways with a speed limit of 70 mph, what speed are school buses and trucks restricted to?

The correct speed limit for school buses and trucks on freeways with a speed limit of 70 mph is 55 mph. This regulation is in place because larger vehicles such as trucks and buses require more time and space to accelerate and to safely navigate compared to regular passenger vehicles. Setting a lower speed limit for these vehicles helps to ensure safety by reducing the overall risk of accidents, as it allows them to operate more predictably in the flow of traffic. This differentiation helps maintain smoother traffic flow and enhances the protection of all road users, especially given that buses frequently stop to pick up or drop off passengers.