In order to squeeze more capacity out of the railway network, infrastructure operator ProRail will begin to use a 6 second increment working timetable from the 2020 timetable revision, down from one minute timepoints. As many here know, this has long been a common practice among Japanese railways, though 6 seconds is very ambitious (depending on the railway or service, it typically ranges from 5 to 15 seconds in Japan).
https://railway-news.com/prorail-increases-capacity-for-2020-timetable/