Size and space for approach and use
The design gives enough size and space for reaching, moving and using it, no matter the user’s body size, posture or mobility.
Example
A ticket machine with a screen that both standing and sitting users can see, and enough space on the floor for a wheelchair to come next to it, is useful for many more people than a machine made just for a standing adult of average height.
Key point
This principle clearly allows the use of assistive devices. A space that a wheelchair or walking frame can reach but does not leave enough room to move around does not follow the purpose of the rule.