Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Acoustic Vehicle Alerting System(also: AVAS, Minimum sound requirement, Pedestrian warning sound)
- A class of vehicle systems that emit artificial sound to alert pedestrians and other road users to the presence and movement of quiet vehicles — typically electric and hybrid vehicles at low speeds, where tire and aerodynamic noise are insufficient for detection. Regulatory…
- External Human-Machine Interface(also: eHMI, External HMI)
- A class of interfaces on the exterior of a vehicle — typically an automated or autonomous vehicle — designed to communicate the vehicle's intent, awareness, or state to pedestrians, cyclists, and other road users who would otherwise rely on cues from a human driver (eye contact,…
- Human-Vehicle Interaction(also: HVI, Vehicle-pedestrian interaction)
- The field studying how people communicate, negotiate, and coordinate with vehicles and their occupants — including drivers, passengers, and, increasingly, automated systems. Human-vehicle interaction encompasses internal interfaces (dashboards, voice assistants,…
- Trust in Automation(also: Automation trust, TiA)
- A human factors construct describing the extent to which a person believes an automated system — a car, aircraft, medical device, AI assistant, or robot — will perform reliably and behave in their interest, typically measured via validated questionnaires such as the Trust in…
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