A forklift speed limiter caps the truck's maximum travel speed, either as a fixed setting or dynamically by zone, load or detection event, on compatible forklifts that accept a speed-control command.
Speed limiting comes in three forms. A fixed cap sets the truck’s top speed through the manufacturer’s controller settings. Zone-based limiting lowers the cap automatically in defined areas such as docks or crossings. Event-based slowdown reduces speed when a detection system senses a person nearby. All three depend on the truck’s control system accepting a limit, usually through the CAN bus or a dedicated speed-control interface, so they work on compatible forklifts and not on every truck in a mixed fleet.
Limiting speed reduces stopping distance and impact energy, but it is not a substitute for the driver’s duty under OSHA 1910.178 to travel at a speed that allows a safe stop. Adding a limiter to a truck is a modification that may need the manufacturer’s approval under the same standard. Check what happens if the limiter fails, whether drivers can override it, and how it behaves on ramps and with raised loads. The forklift speed limiter guide explains the options.