In recent years, there are some railway companies which have some more time allowance in case for the delay of trains by extending the required travel time, which used to be shortened as a countermeasure against competitors, through review of the time schedule.
最近では各地でダイヤの見直しによって一旦は競合交通機関対策で短縮した所要時間を多少延ばして遅れても問題無いように余裕時間を増やしている鉄道会社もある。