As long as you reported it, the final disposition should be fine in this case.
They don't care about the specifics of garden variety moving violations and parking tickets, they just don't want a lot of them, or a lot of them recently, or a lot of them after you're old enough to know better. 3-4 tickets around age 20 with none in the last 10-15 years should be a non-issue. They also don't want to see stuff like reckless, street racing, etc.
DUI is where they may ask "have you ever been arrested", even if dropped to a lesser charge. Have to read the fine print.
Some states don't allow them to ask about arrests, only convictions, so that varies by airline. FAA/Fed can ask anything.