What speed must extra trains adhere to in yard limits?

In yard limits, trains are required to operate at a speed that allows them to stop within one-half the range of vision. This is primarily to ensure safety in areas where rail traffic may be frequent and where there could be unexpected obstacles or personnel on or near the tracks. By limiting speed in this way, it allows crews to react to circumstances such as other trains, switching operations, or maintenance activities that may require immediate attention.

This practice is done to maintain a high level of safety in areas where there is a higher likelihood of encountering other trains or equipment, ensuring that operators can always stop in time to prevent accidents. The requirement aligns with operating rules that prioritize safety in environments where visibility may be compromised and where the potential for sudden stops is a critical consideration.