1st things 1st:- Get a unanimously accepted Kosher Eiruv. If we cannot even have a universally accepted Eiruv, how are we ever going to have a unanimously accepted street closure arrangement.
Don’t run away from the issue by talking about ambulances etc. Even in Mattersdorf, everyone understands that ambulances are allowed there on Shabbos/Y.K. no questions asked, and I have seen them there on the Holy Shabbos, without anyone shouting nor stones being thrown.