We've seen this kind of thing before. Yeah, this is the equivalent of having your neighbor not paint your side of the fence, or not go an inch over his side of the lawn while trimming it. Except, instead of a border between houses and a pact between people, the stakeholders here are national entities. Who knew that countries could be so petty? Would it kill them to just fix the other side of the road, too?
Still, it must be funny to be on the winning side of this exchange and laugh at the state of your fellow neighbor's pavement. Haha, your pavement sucks! Or something like that.