Except in Japan. Googled "japan train schedule accuracy" > The average delay for a Shinkansen train is around 20 seconds. For other trains operated by other ra

Except in Japan. Googled "japan train schedule accuracy" > The average delay for a Shinkansen train is around 20 seconds. For other trains operated by other railway companies, the average delay is around 50 seconds. In both cases, the average delay is less than a minute. But these average figures need to be tempered with the occasional incident. And quite the opposite for charter vacation flights which can leave hours earlier than the stated departure time.