There was another woman, named Colvin, years later who was chosen as a symbol who would end the "back of the bus" practice. Unfortunately, Colvin became pregnant with an older, married man's child. So, her value as a symbol diminished. That was the end of it for her.
Rosa Parks was selected by the NAACP to be a replacement for Colvin. Parks was a creation of political activists. She was manufactured in order to get national publicity to change a bad practice. Parks is well known (and Kirkaldy is not) because Parks was created to be a symbol.
You know, the bus law seems like one of those things which were broken more often than not, but only be enforced when a bus driver or white passenger decided to make a stink about it. I heard that Colvin made a huge ruckus about her arrest as well, fighting with the cops, cursing and spitting - such that she’s either gotten away with it before or she was totally insane.
I’m betting they had a few dozen “Rosa Parks” planned, hoping one of them would get arrested.