The use of this order for a train "running ahead," as proposed in the former edition of The Train Wire, is unnecessary with the second example under [Form B.]
The effect of an order in Form C is to reverse for a time or for certain parts of the track the relations of trains as respects superiority of right. Some have failed to perceive that, under certain circumstances, it will be proper for a train mentioned in this order to leave the designated point before the other has arrived.
This point is settled by the rules with the form, but it may not be altogether clear to some that the conclusion is correct. The following will perhaps make it clear:
Let A, B and C in the following diagram represent three stations, of which B is the schedule meeting-point of two trains running in the directions indicated, No. 1 being the superior train and having the right to run on its own time beyond B if No. 2 has not arrived.
A……………B……………C
No. 1
No. 2.
Both trains are due at B at the same time. If No. 1 is late before arriving at A an order is given:
"No. 2 has right of track against No. 1 from B to A."