It's probably not a first amendment situation. You can still use land lines to communicate and a library to access information. This is plain and simple a cell phone use situation.
I was in error about the repeaters however - they are city owned. If the city chooses to shut them down, so be it. You are not now nor have never been guaranteed instant gratification ... uh, communication and information. For that matter, if this issue of being incommunicado is so distressing, stay off public transit.
If people can't live without a cell phone for the commute on a subway, they should find a different way to work.