rules are there to be followed, if you really must take a u turn then do so to save a life, but be prepared to get a ticket.

being in an emergency is not an excuse to disregard traffic rules, you might be endangering others by doing so. and sometimes one man's emergency might not be an emergency at all, its subjective.

I know rules sometimes sucks, but rules are there for people to follow. Only solution I think is to petition the rule makers to amend the rule.