Signs are worthless if they can’t be seen.
Seems fairly obvious but unfortunately obvious rarely translates into the real world.
If we put up a sign then it’s our job to make sure it’s seen by those who need to see it.
And if it’s not being seen, move it!
PS – This was inspired by a recent driving experience in Calgary. New road, terrible signage. But it applies in many different scenarios. Good design means we can get to where we need to without thinking about it.