Driving Safely in a School Bus
Core concepts
Everything in this domain flows from one fact: a school bus is heavy, tall, and slow to stop, and it carries the most fragile cargo on the road. Understand stopping distance as perception distance plus reaction distance plus braking distance; at highway speed a loaded bus needs far more room than a car, and a full brake application on a bus with air brakes takes hold only after the system builds pressure. Know following distance rules cold: stay at least four seconds behind the vehicle ahead in ideal conditions, and add a second for each hazard (rain, darkness, heavy traffic, or a road that is narrow or under construction).
Understand speed management on curves and downgrades: reduce speed before the curve, never brake hard while turning, and select a lower gear before a long descent so you are not riding the brakes. Know tail swing and off-tracking - the rear wheels cut inside the front wheels' path, so you must swing wide before a turn and check that the rear clears curbs and parked cars. Railroad crossings require stopping, opening the door or window, and listening, except where a crossing is exempted and posted.
Traps
Questions love the word "always." Distinguish rules that always apply (stop at crossings unless exempt) from judgment calls. Another trap is confusing the following-distance rule for cars with the bus rule. Watch for items about air brake lag and about using the engine retarder on slippery pavement, where it can cause a skid.
Worked example
If you are traveling 40 mph, four seconds covers roughly 235 feet (about 59 feet per second times four). At 55 mph the same four seconds covers about 320 feet. That is why the rule is expressed in seconds, not car lengths.
Rule of thumb
Before any maneuver, ask: "Where is my rear bumper going?" If you cannot answer, you have not checked tail swing.