The flat mirrors mounted at a school bus's front corners are correctly set. What should the driver be able to see in them?

Explanation

Correctly set flat mirrors reach about 200 feet, or four bus lengths, to the rear, show the full run of both sides, and pick up the point where the rear tires meet the pavement. These mirrors sit at the two front corners and serve as the long range view down the sides and behind, which is why the tire contact patch matters: catching it is how a driver knows the mirror is working its way down the side of the bus rather than skimming out over it. Treat 200 feet as what the driver aims for rather than what the mirror guarantees, since the area the driver cannot see behind the bus reaches 150 feet and may stretch to 400, depending how long and wide the bus is, and there is a second unseen pocket just under and ahead of each mirror housing. All three wrong options give the correct setting for a different mirror on the same bus: the ground ahead of the bumper is what the crossover mirrors are for, the interior view belongs to the overhead mirror inside, and the wide angle side picture comes from the convex mirrors mounted beneath the flat ones. Each is a real requirement filed under the wrong mirror, which is the usual way a mirror check goes wrong. 49 CFR 383.123(a)(2)(i) makes external mirror systems a required knowledge area but fixes no setting, so these figures are the manual's.

Source: 49 CFR 383.123(a)(2)(i)