Poorly-lit, non-rail stairways and stairways with loose railings are common slip & fall hazards, while railings with tightly-spaced pickets can cause children to get stuck.
Optimal
Stairways are well-lit, have secure handrails, and are free of hazards.
Cautionary
Minor issues such as dim lighting or slightly loose handrails.
Hazardous / Out of Range
Poor lighting, missing or loose handrails.