What 29 CFR 1926.602 requires (plain English)
29 CFR 1926.602 sets the safety requirements for earthmoving and material-handling equipment used in construction: loaders, dozers, scrapers, graders, off-highway trucks, and similar machines. These are among the heaviest and most hazardous machines on a site, operating close to workers on foot and near excavations.
Covered equipment must be equipped with rollover protective structures (ROPS) and seat belts, and the operator must wear the seat belt so the ROPS can protect them in a rollover. Bidirectional machines must have a horn, and no earthmoving or compacting equipment with an obstructed view to the rear may be used in reverse unless it has a functioning reverse-signal alarm distinguishable from the surrounding noise or a worker signals that it is safe to back. Equipment must be inspected, and access to the operating area controlled.
1926.602 works with the motor-vehicle standard (1926.601) for on-site trucks, the excavation standard (1926.651) where equipment operates near trenches, and the crane standards for lifting equipment. It targets the rollover and struck-by hazards of heavy construction machinery.