120 kilometers. Trucks are slower than buses: (120-80) ÷120×100%. =40÷120×100%. ≈0.333×100%. =33.3%. Coach introduction: Generally have a small luggage rack in the car and under the floor luggage compartment, and some have a roof luggage rack. In order to facilitate passengers and drivers to get on and off the bus, there are passenger doors and driver doors. Stool transport personnel, improve the efficiency of transport. The passenger door is located in the front of the vehicle, usually the passenger and driver share a door, and there is a fire exit on the other side of the body for emergency use. In this way, passengers can reach their destinations more conveniently and cost-effectively.