How are OCS limits designated according to the guidelines?

OCS limits are designated by specifying the track and identifiable points, which is the correct approach to ensure clear communication and understanding among personnel working on or near the tracks. This method provides specific reference points that can be easily understood and recognized by all staff involved in operations within those limits.

By indicating the track and identifiable points, it allows crews to accurately identify the confines of a work area, ensuring safety and coordination amongst various teams while minimizing confusion. This specificity is crucial in the realm of rail operations, where precise location details can impact operational safety and efficiency.

Other methods, such as indicating responsible train crew or using random identifiers, do not provide the clarity or precision required for safe operations. Similarly, relying solely on mileposts may not communicate the necessary details about the work areas effectively. Identifiable points give a more immediate context that can be understood in conjunction with visual reference on-site.