What are the methods to establish working limits on the main track?

The correct answer identifies that Form L, Foul Time, and General Notice are the appropriate methods to establish working limits on the main track. Each of these methods serves a distinct purpose in ensuring the safety and efficiency of rail operations.

Form L is a formal document used to communicate specific restrictions or conditions on the track. It provides detailed information about working limits that must be observed, thus serving as an official means to manage track access for maintenance or repair work.

Foul Time is a method that establishes a time frame during which equipment or personnel may be present on the track. By clearly designating this timeframe, Foul Time helps prevent conflicts with train movements, thus ensuring that the safety of workers is maintained.

General Notice is a method of informing all personnel about current conditions or restrictions that may affect operations. It serves to keep everyone on the same page and ensures that all relevant parties are aware of any changes or safety protocols in place.

These three methods collectively enhance the safety and organization of railway operations, preventing potential accidents and ensuring that necessary work can be performed on the tracks with reduced risk.