Sorry, but that sounds hilarious. If "a city wanted", it's still people who would need to ensure "to signal construction work". And people don't care. And for other stuff, people would need to pay for it with their taxes. I'm sorry, but as an outsider, I would say the roads (usual roads!) in the US are in "perfect" condition only in California. In other states, it's the usual asphalt-with-cracks, which will turn into a hole when a heavy truck rides it thru the rainy/snow season.
Heck, majority of the world has problems with trash on the streets, and cities can't neither teach their people to not litter, nor clean up timely after them.
