Infrared controls require the operator to maintain line-of-sight
view with equipment like this RT trench roller, eliminating the
possibility that the 15,000-lb. machine will move into a
dangerous blind spot or injure a distracted crew member. Smart
Control enhances safety by stopping the machine when operator
comes within 6 ft. Radio remote-controlled equipment, on the
other hand, keeps moving if the operator turns away or the
machine moves behind an obstruction. The 16-channel transmission
enables multiple machines to be used on the same jobsite without
interference from radio-controlled cranes, boom pumps, or other
equipment.  Wacker Neuson WOC Booth O30145