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Definition of Universal design is pretty difficult. is it possible to design something for any people?
Explanation regarding universal design in Wikipedia is pretty clear.
this is from Wikipedia.
Universal design refers to broad-spectrum architectural planning ideas meant to produce buildings, products and environments that are inherently accessible to both the able-bodied and the physically disabled.
It emerged from slightly earlier “barrier-free” concepts, the broader accessibility movement, and adaptive and assistive technology and also seeks to blend aesthetics into these core considerations. As life expectancy rises and modern medicine increases the survival rate of those with significant injuries, illnesses, and birth defects, there is a growing interest in universal design. There are many industries in which universal design is having strong market penetration but there are many others in which it has not yet been adopted to any great extent.
Curb cuts or sidewalk ramps, essential for people in wheelchairs but also used by all, are a common example. Color-contrast dish ware with steep sides that assist those with visual or dexterity problems are another. There are also cabinets with pull-out shelves, kitchen counters at several heights to accommodate different tasks and postures, and amidst many of the world’s public transit systems, low-floor buses that “kneel” (bring their front end to ground level to eliminate gap) and/or are equipped with ramps rather than on-board lifts.