What does Line 3 permission to proceed past Stop Signals include?

Line 3 permission to proceed past Stop Signals specifically includes all signals within the interlocking. This means that when permission is granted under Line 3, the dispatcher is providing authority to move through the entirety of the interlocking area, ensuring that the train is cleared to pass not only the stop signal but also any other signals that may be present within that jurisdiction.

Understanding this concept is crucial because interlockings are designed to control train movements by ensuring that conflicting routes are not utilized at the same time, maintaining safety within complex track configurations. This means that the train can proceed safely through all signals that are part of that controlled area, as long as proper protocols are followed.

The other options do not encompass the full scope of what Line 3 permission entails. For example, limiting it to only signals outside the interlocking fails to recognize the importance of the control mechanisms within the interlocking itself. Similarly, focusing on only the next section of track or only visible signals does not capture the complete clearance intended by Line 3 permission, which is specifically directed at managing the safety and efficiency of movements through all signals within the interlocking.