John Alexander Anderson,
The Train Wire: A Discussion of the Science of Train Dispatching
“ It would appear then that when an order gives a train of inferior right the right of track to a given point against a superior train, the train arriving first at the designated point may go beyond it, before the other arrives, to any point where it can clear the regular time of the opposing train the number of minutes required. The train thus passing the given point must run as the inferior of the two until the other is met, and should be required, as in the rule, to clear the other by as much as the train rules prescribe for clearance of similar trains. ”
