How can track cars be authorized to move past stop signals at interlockings?

The correct answer highlights the procedure for authorizing track cars to proceed past stop signals at interlockings using verbal permission in accordance with Rule 241. This rule outlines the protocols that must be followed for providing authority to move past a stop signal safely.

Verbal permission is essential because it ensures that the dispatcher or the individual granting authorization can communicate directly with the operator of the track car, confirming the situational safety and giving real-time instructions. This method allows for immediate corrections or additional instructions as necessary, ensuring that the movement is conducted safely within the operational guidelines.

Other methods, such as a written authorization or contacting the next station, may lack the immediacy and clarity required in urgent situations, which makes Rule 241 particularly important in maintaining safety during track car operations. Using an electronic signal change might not be applicable in all cases, especially if the systems are not synchronized or if there's a failure, emphasizing the need for direct human communication as specified in the rule.