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Is there a reason why all escalators are 2 people wide?

• MagnumOpus 11y ago
  It is the maximum that is safe (3 wide has a person in the middle with no handrail and if anyone fell, they would become a bowling ball). It is much more efficient than 1 person wide - two double-wide escalators offer more capacity than the 3 single-wides that fit in the same space, and likely consume less energy and cost less to maintain.