As someone from a dense city with generally smaller roads than NYC (Philly), I think that's untrue. If NYC wanted to do it, it could be done. In Philly, trucks make it down alleys where the roadway is half the size of the truck. Or they wheel the dumpsters down the alley to the corner. That doesn't mean every alley is suitable, but you can put the dumpster on the main road where you put the trash, or do as our European friends suggest.