What condition must be verified before confirming that it is safe for a train to approach a station platform?

Before confirming that it is safe for a train to approach a station platform, it is essential to verify that no other train is occupying the station. This condition is critical because if a train is occupying the platform, there could be potential conflicts and safety hazards when another train approaches. Ensuring that the platform is clear prevents the risk of collisions and guarantees a safe environment for both the incoming train and any passengers who may be boarding or alighting. Passenger readiness, presence of other trains, and track maintenance status are all important considerations for overall safety and operation but do not address the immediate need to prevent overlapping train movements at the platform.