AI builds stupid roads

AI builds roads in stupid places. See screenshoot.

I think this might be a false alarm as there might have been a city there.

If a city is razed then one of the improvements remaining on the tile will be roads alongside the city ruins. You can see that there is unclaimed land that has been farmed up and trade posted on the other island (although there does seem to be another city ruins there too). Can you confirm that there haven't been several cities razed in that area?

However, I do think there's a valid issue here in that the AI never seems to remove unnecessary roads. Then again they have little need to as they pay very little upkeep on them the higher you go in difficulty.

Razed city you can see on next island, next to iron. I removed roads from this island when my culture expanded there, but I do not have screenshot to prove it.

Yeah but I think the ruins would get removed if the tile for e.g. is mined or farmed; so what Soil says seems plausible.