Many cities and towns have had ZERO regard for the wiring nightmare hanging over their streets. Not to mention trees and other hazards. UPS is a bunch of damn fools if they think they can simply put drones on trucks and go for it.
What do the drivers think? I read the UPS driver forums and they already had a lot of legitimate griefs and a lot of them felt overworked and pressured, so now they have to do drones, too? This is going to go over like a lead balloon in a gravity well.
Besides which, there are drone no-fly zones all over the place. The town where I live is completely off limits as we are too close to a major airport. But that's OK because there are tons of badly groomed trees and some of the worst telecom pole wiring I have ever seen. Phone, CATV, power, fiber, and above those lines are 100ft high voltage lines with at least three tiers. Even if there wasn't a flight ban here, you'd have to be a complete moron to try to fly a drone among all these wires and the trees. Forget the kite-eating tree. It has nothing on the ones around here. They don't just eat drones, they also thrown limbs at you. Seriously. They eject limbs from time to time.