That is not strictly true. The LIRR Main Line east of Ronkonkoma uses timetable/train order scheduling: https://en.wikipedia.org/wiki/Train_order_operation htt

That is not strictly true. The LIRR Main Line east of Ronkonkoma uses timetable/train order scheduling: https://en.wikipedia.org/wiki/Train_order_operation https://en.wikipedia.org/wiki/Train_order_operation What is more interesting is how they get away with this when PTC is now mandatory (a lot of special operating rules/restrictions).