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T must not depart Z until X mins after Y has has been formed.

This rule forces train "T" to wait for a period of time at any timetable location Z relative to the time of train "Y" comes into being.

'Being formed' means a train created by a 'Next' working instruction.

The formation must be effected at the same location as the train T is being held.

The reference to Y must be to the train being formed but T need not be involved in the formation itself.

For example: 1A00 can be held at the station until 5A01 arrives and froms 1A01


Last edited by GeoffM on 15/09/2016 at 03:01