There are three distinct categories of HMI Systems related to rail/bus/coach applications: operator or cockpit controls, passenger access controls, and passenger convenience controls. For operators and passengers of rail vehicles, the key to an effective HMI System is consistent and predictable performance with time-proven controls that are familiar to multiple operators.
EAO has experience in developing HMI Systems in rail applications that meet industry best practices for component placement, size of surface area, legend size and color, emergency stop switch configuration, protection guards and shields, and other rail cockpit and passenger ergonomic factors. The goal in designing cockpit operator and passenger access controls is to provide optimal usability, efficiency, and safety. Multiple shapes, textures, and haptic response are used to differentiate specific control functions and provide a tactile indicator without the need to look at the controls.
HMI Systems - White Paper