Forklift-to-forklift collision avoidance systems put a ranging unit on every truck so each one knows how far away the others are. Many use ultra-wideband (UWB) radio, which measures distance from signal travel time and does not need a clear line of sight, so two trucks approaching the same blind corner or rack end can detect each other before either driver can see. When the gap shrinks below a set threshold, both drivers get an in-cab warning, and on compatible forklifts the system can also cut travel speed automatically. The units talk to each other directly, so the core function does not depend on Wi-Fi or cellular coverage.
The full guide is Forklift collision avoidance systems, which separates systems that only warn from those that slow the truck. The key settings are the warning and slowdown distances, which should reflect the stopping distance of the fastest truck in the fleet. Automatic slowdown needs a CAN-bus or speed-control interface; on older or mixed-brand trucks the system may be warning only.
The technology supports the travel rules in OSHA 1910.178(n), which already require drivers to keep about three truck lengths from the truck ahead and to slow down at cross aisles. During a pilot, check how often alerts fire in normal two-truck work such as tandem loading, because constant alerts get ignored.