In what scenario can a Dispatcher allow additional line 2 authorities for track cars?

The appropriate scenario for allowing additional line 2 authorities for track cars is when there are no existing movements authorized to operate within the limits. This means that the dispatcher can ensure that the track is clear and safe for additional operations, reducing the risk of conflicting movements. Ensuring that the area is free of authorized movements is crucial for maintaining safety and operational efficiency, as it allows for additional trains or track cars to operate without the possibility of encountering another active train in the same area.

Other scenarios, such as the presence of engineers or considerations regarding weather conditions, do not directly address the fundamental safety requirement of ensuring the track is clear of any authorized movements. Thus, these factors become secondary, while the absence of conflicting activities is the essential safety measure that justifies the granting of additional authorities.