15.3. Bulldozers
15.3.1. Before leaving a bulldozer the operator should:
apply the brakes;
lower the blade; and
put the shift lever in neutral.
15.3.2. At the close of work bulldozers should be left on level ground.
15.3.3. When a bulldozer is moving uphill the blade should
be kept low.
15.3.4. Bulldozer blades should not be used as brakes except
in an emergency