What is the maximum speed when proceeding beyond a yellow flag without written restriction?

When proceeding beyond a yellow flag without a written restriction, the maximum speed allowed is 10 MPH. This speed limit is in place as a precautionary measure to ensure the safety of workers and the integrity of the track ahead, particularly when conditions may not be fully known. The yellow flag indicates a cautionary condition, signaling that the train crew should proceed with enhanced vigilance.

In the context of railroad operations, this speed limit is standard practice to minimize risk and allow for adequate response time in the event of encountering unexpected situations or hazards. The rationale behind setting this specific speed ensures that crews have the ability to react and manage their train safely while transitioning through areas of potential danger.