How should a train handle a signal indication when a sign with two sets of numerals is posted?

When a sign with two sets of numerals is posted, the proper protocol is to differentiate based on the type of train operating. The higher speed designated by the numeral is specifically intended for passenger trains, which are typically allowed to operate at faster speeds due to their design and service requirements. This practice ensures that passenger trains can maintain efficiency and reduce travel time while adhering to safety regulations.

In contrast, freight trains and other slower-moving trains are generally expected to observe the lower speed indicated on the sign. This distinction is crucial for maintaining safe operational practices, as it helps regulate and manage the varying speeds of different types of trains on the same track. Thus, the correct answer highlights the operational guidelines that prioritize the needs and safety of passenger trains while ensuring that all trains are adhering to designated speed limits.