Joseph:
“Halacha doesn’t care which side of the Brooklyn-Queens border the eiruv is. Halacha doesn’t differentiate whether an eiruv is in Brooklyn or whether it is in Queens.
The difference is not based on artificial local intracity borders set by a government. Both are part of the same city. And the border is virtually meaningless.”
Rav Moshe would disagree with you. Furthermore, if you don’t follow Rav Moshe, I would challenge you to find the word city in the Shulchan Aruch regarding shishim ribo. Clearly, the criterion applies to a street.