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(Image: Metro Trains Melbourne)
MetroNotify provides push notifications on service levels of Melbourne's Metro train system.
The service levels are broken down into: "good service", up to 5 minutes late; "minor delays" between 5 and 15 minutes late; over 15 minutes late is a "major delay"; as well as "suspended", "works alert", and "travel alert".
The operator says that each category "will be accompanied by information explaining why there is a delay or a change to your service". Presumably, good service is impossible to explain on Australian public transport netwoks.