Which of the following can be used to report clear?

Reporting clear in the context of train dispatching is primarily done using specific locations that are well-defined and commonly recognized within rail operations. Station names and yard limit locations serve as precise and universally understood identifiers for trains and dispatchers.

When a train reaches a clear reporting point, it is essential for the dispatcher to have clear communication regarding the train's location to ensure safety and operational fluidity. Station names provide specific locations where trains can stop or be monitored, while yard limit locations indicate areas where train movements are subject to special rules and procedures.

Other options, like street names and highway markers, may not provide the necessary clarity or relevance within railroad operations. Similarly, city boundaries are often too vague, as they can encompass large areas with multiple rail lines and stations, making them less effective for accurate reporting in a dispatch context. Thus, station names and yard limit locations are the most appropriate for clearly communicating when a train has cleared a specific section of track.