What is the speed limit for a Regular train operating in Yard limits?

The speed limit for a Regular train operating within Yard limits is Maximum Allowed Speed (MAS). This indicates that the train must not exceed the designated speed limits specific to the yard or its operating conditions, which may be influenced by factors such as track conditions, safety considerations, and the presence of personnel or equipment in the vicinity.

In a yard, trains often navigate through potentially crowded and complex environments where slower speeds enhance safety and allow for maneuvering around other trains or equipment at rest. MAS provides flexibility, allowing for variations based on specific circumstances that can dictate the safe operational speed, rather than a fixed speed limit. This approach ensures safe operations while maintaining efficiency in yard activities.

In contrast, the other choices signify fixed speed limits, which would not always apply in the varied scenarios encountered in yard operations.