1.
train schedule disruption; timetable disruption
A disruption to train timetables causing delays or cancellations. ダイヤ is short for ダイヤグラム (diagram), referring to the graphical train schedule used in railway operations.
台風でダイヤが乱れている。
The train schedule is disrupted because of the typhoon.
人身事故の影響でダイヤ乱れが発生しています。
Schedule disruptions have occurred due to a passenger accident.
朝のラッシュ時にダイヤが乱れると、通勤する人たちに大きな影響が出る。
When the train schedule is disrupted during the morning rush, it greatly affects commuters.
USAGE:
ダイヤ (short for ダイヤグラム) in this context means 'train timetable,' not 'diamond.' This usage is specific to railway operations. You will often hear station announcements saying ダイヤが乱れております (the schedule is disrupted).
COMMON COLLOCATIONS:
- ダイヤが乱れる (the schedule is disrupted)
- ダイヤの乱れ (schedule disruption)
- ダイヤが回復する (the schedule returns to normal)
- ダイヤ通り (on schedule)