What is a characteristic of temporary speed restriction signs?

Temporary speed restriction signs are designed to govern train speeds in specific areas for safety reasons, often due to track conditions, maintenance work, or other hazards. The correct answer highlights that these signs regulate speed until a specified point, ensuring that train operators are aware of changes in permissible speeds and can adjust accordingly to maintain safety.

These restrictions are crucial, as they not only protect the integrity of the track and the safety of train operations but also help prevent accidents in situations where conditions have changed temporarily. It’s important for crew members to recognize that these signs have a defined scope, and their authority extends only until the specified point is reached, at which normal speed margins can be resumed unless otherwise indicated.

In contrast, the other choices do not accurately represent the function of temporary speed restriction signs. Ignoring them, considering them permanent, or restricting their effectiveness only during daylight does not align with the operational standards set by the LIRR. Understanding this distinction is essential for maintaining safe train operations.