Suppose you're driving in a one way street and see someone coming in the opposite direction.
What's the most natural way to say something like "Hey, you're going against traffic!"
I know how to say basically the same thing just re-wording a little:
これは一方通行の道路だよ！ This is a one way street!
But I was wondering what's the word/expression to actually say "against traffic" (to go against traffic, or to go/drive in the wrong way, etc).