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Does the train leave on time?
Literal
Train [topic-は] on-scheduled-time [adverbial-に] leaves [question-か].
A train-timing question. 時刻通りに ('on schedule,' with 時刻 meaning 'exact time') is almost synonymous with 定刻通りに ('according to the appointed time'); the difference between 時刻 and 定刻 is thin. Polite 出ますか question form.