Talk:WikiProject Costa Rica
I suggest using "CN 123" (with blank) instead of "CN-123"
I will suggest that instead of adding "CN" or "CI", just add the number in the key="ref" tag. I don't think there is an intersection where a CI 1 is different of CN 1, that is, there is only one National Route 1, 27, 126, and so on. The render looks cleaner with only the number.