What should a train do when it sees a Diverting Approach Sign?

When a train encounters a Diverting Approach Sign, it indicates that the train should prepare to stop at the next signal or limit set by the operational framework, typically the Working Limits Stop Sign. This type of sign serves as a critical warning for the train crew, signaling them that they need to reduce speed and be ready to halt their train at the designated stop.

In this particular scenario, the correct action is essential for ensuring safety and compliance with the established procedures. It allows for the proper management of train movements, especially in complex railway operations where diverging tracks or work areas may pose hazards.

The other options would not align with proper protocol when seeing a Diverting Approach Sign. Proceeding without stopping or accelerating could lead to safety violations or dangerous situations, while reversing to a previous block contradicts the intent of following the current signal's instructions and could lead to operational disruptions.