What is the method called where the movement authority of trains is withheld?

The method where the movement authority of trains is withheld is known as exclusive track occupancy. This practice is crucial for maintaining safety on the rail network, as it ensures that no other train can enter a designated section of track while it is occupied by a train that has been given permission to be there. This is particularly important during maintenance activities or in emergency situations, where the presence of only one train enhances safety and reduces the risk of accidents.

With exclusive track occupancy, designated rules and protocols guide how train movements are controlled to prevent collisions and ensure the safety of personnel working on or near the tracks. It involves clear communication and adherence to strict procedures for train operations.

Other options might refer to related practices or policies but do not specifically describe the act of withholding movement authority in the same clear terms as exclusive track occupancy.