In railroad operations, what does the term "Working Limits" refer to?

"Working Limits" refers to regions where work crews are actively performing maintenance or construction tasks, and it is critical for trains to halt or proceed with extreme caution in these areas. This term is essential for ensuring the safety of both railroad personnel and train operations. When working limits are established, it signals to train operators that they need to be cognizant of potential hazards and the presence of workers on the tracks.

In practice, when entering such limited areas, train engineers are often required to comply with specific speed restrictions or stop completely, ensuring that they do not inadvertently interfere with ongoing work or pose a danger to the workers. This concept is fundamental in railroad safety protocols, as it prioritizes human safety over the standard train operation procedures.

The other options do not capture the essence of "Working Limits." Restricted visibility refers to safety concerns in conditions where visibility is impaired, designated stop areas pertain to specific locations for halting trains without any active work, and increased train speed zones generally indicate areas designed to allow trains to operate at higher speeds without the context of worker safety.