Forklifts, industrial trucks, skid steer loaders, bobcats and other similar material-handling machines are often difficult to maneuver and susceptible to a wide range of accidents. Their nature exposes operators and nearby co-workers to falling loads, crushing hazards and loading dock falls. Large loads and high centers of gravity also make these machines prone to tip-over accidents. To mitigate some of these dangers, machines are usually equipped with Roll Over Protective Structures (ROPS), Falling Object Protective Structures (FOPR) and other forms of guarding. Machine speed and braking acceleration is often controlled electronically to reduce the likelihood of a tip-over.