Which of the following is an example of a dangerous condition?

A dangerous condition refers to any situation or state that poses a risk to safety, particularly in the context of operational environments like train operations. When considering tools in defective condition, it becomes evident how they present a significant safety hazard. Defective tools can malfunction during use, potentially leading to accidents, injuries, or operational failures. This not only endangers the operator using the tool but can also create risks for other workers and passengers.

In contrast, well-maintained tracks, clear pathways, and safety signage in place are all components of a safe operational environment. Well-maintained tracks are crucial for smooth train operations, while clear pathways ensure that personnel can move freely without obstructions. Safety signage plays an essential role in providing guidance and warnings to staff and passengers, thus contributing to an overall safe atmosphere. Therefore, while the other options enhance safety, tools in defective condition dangerously detract from it, making that choice stand out as the only example of a hazardous situation.