Stairs
It goes without saying why stairs may pose a problem for those in wheelchairs. Even the elderly may find long sets of stairs difficult and tiring to walk up.
If the elderly, or those who are blind/low vision, know ahead of time how many stairs to expect and whether that is achievable for them, they can make informed decisions about their route and plan accordingly.
When subcategorising, note that a platform in stairs will break up a set and create a new one. So you will drop a pin for each new set of stairs, and subcategorise it by the amount of stairs within that set.
For example; if you come across 3 sets of stairs with 5 steps each, then you will drop 3 pins and subcategorise ‘5-8’.
Let’s try it.