A banked curve has a posted speed limit that is safe for passenger cars. Why might that same speed still be unsafe for a bus?

Question

Accepted Answer

Every banked curve has a safe "design speed," and in good weather, the posted speed that is safe for cars can still be too high for many buses.

Answer

Buses have better traction than cars, so the posted speed is always too conservative for a bus.

Answer

Bus speedometers read lower than the bus's actual speed, so drivers can't trust the posted number.

Answer

Federal rules require every bus to drive at least 10 mph under the posted limit on any curve, no matter the conditions.