Thanks, if this was in response to changesets like 72411037, that user went on a retagging spree several years ago ostensibly to connect county seats, but it turns out they were secretly trying to promote historic farm-to-market and intercounty highways to be identifiable on a zoomed-out map. They now contribute to OpenHistoricalMap instead, where that information belongs, so if you see any other oddly prominent township and county highways, that’s probably what’s going on.