Sorry, I miswrote again. In my reply to emsr2d2, I wrote 'I have to think "wrong X" is always preceded by "the'. Of course I know you can say a wrong turn, a wrong idea, a wrong answer ---etc. I should have written 'I have to think "wrong bus (/train / road/ --)" is always preceded by "the"'.
In whatever way you use "wrong bus, train, road ---", choice or judgement is always made.
Is my idea right?
Sorry for my carelessness and for annoying you.