Problem with AI

[FOR GONDOR]

I have noticed that the AI never construct any roads, and that when you take a province that had a road, the roads disappear, why don't the AI want to construct any roads?

[Ovidius Empiricus]

I never see buildings disappearing. If that's true in your game, it's definitely not normal behavior for the mod.

Roads add to trade and law. They also help somewhat with mobility, although the AI probably doesn't evaluate that at all. Of course, if it's on an island like Crete or something, roads to nowhere won't increase your trade, since ports take care of all of that. But generally, what it sees is that this thing has some cost which the AI could spend on numerous other things, and what it does is increase their profits slightly in the next turn. That's apparently all the AI sees.

But roads also decrease taxes. Corruption may also be an issue, indirectly: it cuts into profits and is mitigated by the law bonus, but with little or no corruption in their homeland areas, the law bonus doesn't help much if at all. Overall, it's not much of a gain or maybe even a loss, since taxes make up a much bigger share of income than trade does. So, they would rather invest in other stuff. That's understandable, since they really do have lots of different and time-consuming buildings (or units) to spend money on, and something will have to be prioritized less than all of the other options. (In the real world, that is usually something other than basic infrastructure like roads, but even here politicians tend to make a lot of crazy decisions.) Given enough time for them to construct all of that other stuff first and narrow their options down, I've seen that they do start building roads eventually, at least in some situations. But that's long term, and a lot of the time I'm still building the roads myself once I conquer the place.

If you want to encourage it some more (maybe just for the first tier of roads), you could soften the tax penalty a bit. But it's already at only -5% taxes. I wouldn't reduce it to 0%, because I think some maintenance cost is a good idea, so there are only a few options. I haven't tested it to know what would be enough to really make a noticeable difference. I doubt changing it to -4% would get you what you want, and on the other hand, maybe -1% is too extreme. You could also set it up to start a campaign with more roads in a few key places (or everywhere), but I wouldn't bother with that.

[tungri_centurio]

thats why i say,give the map dirtroads from the start.so the AI don't have to build them.

[ur-Lord Tedric]

The AI does build roads; but they are not a priority in the AI's eyes. If you play 'slowly' (ie thinking of playing for 400+ turns) then more will appear.