❌ I am on the wrong train direction.
✅ I'm on the wrong train. / I took the train in the wrong direction.
'wrong train direction'은 문법적으로 어색해 원어민이 순간 의미를 파악하지 못함—'wrong train' 또는 'wrong direction'으로 분리해야 의미가 명확히 전달됨.
잘못된 예: Sorry, I'm going to be late because I am on the wrong train direction.
올바른 예: Sorry, I'm going to be late because I took the train in the wrong direction.