This question already has an answer here:
- How does road maintenance work? 2 answers
Based on experience, it appears that you only have to pay 1G for each hex of roads that are inside your cultural borders. That means that you don't have to pay to maintain a long road to a city-state if it goes through neutral land
Is this correct? Do I only pay for roads that are inside my borders?
(I think this factor is pretty important when settling a new city further off to get a luxury resource, isn't it?)