When I was using handicap spaces for several months after TM, I usually had
no problem finding empty handicap spaces, except at Wal-Mart for some reason.
I think somewhere there must be a guideline about how many handicap spaces
they are supposed to have per regular spaces. But that might be a usable,
reasonable rule of thumb -- if you have a handicap placard or plate or
sticker and you are at a place where there are a number of handicap spaces
available and you are sure you won't be taking a space of someone you feel
might be more needy, go ahead and use the space. But if you are at a place
where handicap spaces are very limited, and you feel you don't really need
the space that day, then use a regular space.
Just another two cents worth.....
Barbara H.