Motto Shiritai Nihongo
Words used when Vehicles are running late.
Delay[遅延]/ Suspension of Train Operation[運転見合わせ]/ Alternative Route[迂回ルート]/ Alternative Transportation[振替輸送]
Trains, subways, and buses are often delayed or do not run on time when there is a natural disaster (typhoon, snow, heavy rain, earthquake), accident, or fire.

Delay[遅延]
A delay is a situation in which a train is late by 5 to 10 minutes, or more. If you are late for school or work due to a delay, you may get a "delay certificate[遅延証明書] (a piece of paper showing that your train was late)" at the station, or on the Internet, to be excused for being late.
Suspension of Train Operation[運転見合わせ]
Suspension means when a train stops due to a natural disaster or accident: the train's service is suspended until it can operate again. If the train is not able to operate, it will be 運休[train operation stopped].

Alternative Route[迂回ルート]
It is another way for passengers to get to their destination when trains are delayed or suspended. You may take another train or subway to your destination (a station you want to go to).
Alternative Transportation[振替輸送]
If you have a train ticket or commuter pass (a ticket that can be used for a long period of time, such as one month or three months), you can get a "transfer ticket [振替輸送票]" at the station so that you do not have to pay for the alternative route.
Important notices such as delays may be found on train and subway companies' websites, on station platforms and bulletin boards, as well as on train announcements.