If you think the Mohammedans wanted this just to "call their faithful" to prayer, you're dead wrong.
This is an "in your face" message by the Mohammedan community to America.
Simply read the account of the Mohammedans who were instrumental in getting this ordinance passed (paraphrase): "This is the first step. Today it's here, tomorrow, all of America will be hearing our call to prayer."
The message is: Islam is your future.
http://www.danielpipes.org/article/77