What is a "Train Approach Warning"?

A "Train Approach Warning" is specifically aimed at providing a crucial safety alert to workers in the vicinity of train operations. This warning serves to inform them that a train is approaching, allowing them to take the necessary precautions to ensure their safety. This type of warning is an essential component of safe practices in environments where roadway workers are present, as it helps to prevent accidents and ensures that individuals can move to a safe location.

The other options do not accurately describe the purpose of a Train Approach Warning. Halting train operations or announcing scheduled departures does not focus on the immediate risk of an approaching train for workers on or near the tracks. Notifications of track maintenance are also unrelated to the safety concerns posed by a train approaching, as they deal with different operational aspects related to railway maintenance rather than worker safety in real-time scenarios.