When I served as Alderman, there were a few parking issues that I dealt with. I don't know why your Alderman would tell you that it's out of their hands - it certainly isn't. Requesting that the Traffic and Parking Department come up with a solution to this issue sounds like a fine Board order to me. I would highly encourage you to contact your Aldermen at Large as they aren't afraid to tackle parking issues. Similarly to keithn, I'm also very interested in knowing what Ward you live in.