While it's yet to be bourne out, I do have to agree with others in hoping this will actually be quieter overall than cars and trucks. The footprint can be much smaller as well. They don't need huge road capacity and all the construction that goes with it.

But we will see I suppose. Maybe a few hundred drones canvasing the sky above a busy city will be a horrible sound. I hate hearing drones in nature but must admit they tend to get pretty easy to ignore once off the ground and cruising.