The acceptable measurement for super elevation in a curve for Class 4 track should not exceed what value during inspection?

For Class 4 track, the standard for super elevation in a curve indicates that the measurement should not exceed 4 inches during inspection. Super elevation, or cant, is the banking of the track on curves, which helps counteract the lateral acceleration that trains experience when navigating through a curve. Maintaining an appropriate super elevation is crucial for ensuring the safety and stability of train operations, particularly at higher speeds.

Allowing super elevation to exceed 4 inches could compromise the stability of the train and increase the risk of derailment or excessive wear on the track and rolling stock. Hence, adherence to this measurement threshold is essential for maintaining the integrity of the railway infrastructure.

Options presenting measurements that exceed 4 inches are not considered acceptable as they would pose heightened risks to operational safety and track integrity. Therefore, the correct value that ensures compliance with safety standards for Class 4 track is firmly established at 4 inches.