What should a crew member do when a block signal indicates 'Stop' or 'Restricted Proceed' at a spring switch?

When a block signal indicates 'Stop' or 'Restricted Proceed' at a spring switch, the crew member should manually inspect the switch. This is crucial because a 'Stop' signal indicates that there may be a safety concern that requires immediate attention. Inspecting the switch ensures that it is properly aligned and functioning correctly before any further action is taken.

Manual inspection allows the crew member to assess the physical condition of the switch, ensuring that it has not been damaged or obstructed, which could lead to potential hazards if a train were to proceed without verifying the switch's status. This careful checking is a vital part of maintaining safety protocols in railway operations, particularly at locations where the switching of tracks occurs, as any error could lead to accidents or derailments.

Other choices, such as continuing without action or delaying all movements without inspection do not fulfill safety requirements. Testing the spring switch is also not advisable without first ensuring that the track is safe for any movements. Thus, manual inspection stands out as the appropriate and safe response in this scenario.