How is "working limits" defined by NORAC?

The definition of "working limits" by NORAC refers specifically to the designated area where work is authorized and trains are restricted. This is crucial for ensuring the safety of personnel working on or near the tracks, as it establishes a clear boundary where standard train operations may be altered or entirely halted to accommodate maintenance, construction, or other work activities.

In this context, defining working limits helps to manage and communicate the conditions under which trains can operate safely concerning the ongoing work. This is integral to risk management and operational safety protocols, and it ensures that workers can perform their tasks without the increased danger posed by moving trains in the area.

The other options do not accurately capture the intended meaning of working limits. Maximum speed areas pertain to operational speeds rather than work zones. Timetable limits focus more on scheduling rather than the safety and work-related restrictions. Boundaries for maintenance schedules deal with the timing of maintenance activities rather than the physical space where these activities occur.