What does additional line 3 authority allow for TCs?

Additional line 3 authority specifically allows train crews (TCs) to safely proceed past stop signals at interlockings or control points (CP). This type of authority is crucial during situations where normal train operations are disrupted, as it enables crews to continue their journey in a controlled and safe manner. When granted this authority, TCs must follow specific protocols and ensure that the area is clear and safe for movement, thus maintaining operational safety even beyond a stop signal.

This authority serves to help manage and mitigate potential delays or operational challenges, particularly in complex rail environments where traffic may need to be coordinated with other trains or signals. The primary focus is on maintaining safety while allowing flexibility in train operations when necessary. Other choices either misrepresent the function of additional line 3 authority or delineate restrictions that do not align with its purpose.