What does the indication of a clear track mean for train operations?

The indication of a clear track signifies that there are no obstacles, hazards, or restrictions ahead, allowing for safe passage. In train operations, when the track is clear, trains are authorized to continue at normal speed without having to slow down for any potential issues, ensuring an efficient journey. This indication is critical for maintaining schedules and optimizing the flow of trains along the route.

The other options reflect scenarios where caution or reduced speed would be necessary. Proceeding with caution would be warranted if there were uncertainties on the track, expecting delays might indicate congestion or problems ahead, and stopping to check signals would indicate an issue that needs to be resolved before proceeding. However, a clear track removes those concerns, allowing for uninterrupted travel at standard speeds.