What should a crew member do at a stop indication at manual interlockings?

When a crew member encounters a stop indication at manual interlockings, the proper protocol requires contacting the control operator immediately. This action is crucial for several reasons.

Firstly, stop indications are clear signals that train operations must halt due to potential safety concerns, such as the presence of other trains in the block or other hazards. By contacting the control operator, the crew member can receive the necessary instructions or clarifications regarding the situation at hand, ensuring that all safety measures are upheld.

Additionally, the control operator has a broader view of traffic and operations in the area and can provide essential information regarding the status of the tracks, upcoming movements, or delays that may affect the crew’s decision-making. This communication acts as a safety net, preventing misjudgments that could lead to accidents.

In the context of the other choices, they do not align with the protocols required at a stop indication. Verifying the signal status with the previous train is impractical and contrary to established safety procedures. Proceeding if no conflicting trains are seen undermines the principle of absolute caution in response to a stop signal. Waiting for 2 minutes before taking action could unnecessarily delay necessary communication and could escalate safety risks. Therefore, contacting the control operator is the most responsible and safest course