According to the rules, how should trains approach block signals?

When approaching block signals, it is essential for trains to do so with caution and at restricted speed as necessary. This approach is crucial for ensuring the safety of train operations and preventing collisions or accidents. By proceeding at a restricted speed, the train crew has more control over the train's movements and can react quickly to any unexpected situations that may arise, such as an unclear signal or obstructions on the track. This practice allows for safe stopping within a reasonable distance and provides time to assess the signal and surrounding conditions.

The requirement to approach signals with caution underscores the importance of adhering to established safety protocols in train operations. It emphasizes that while a signal may be clear or displaying an aspect indicating "proceed," the train must still be operated in a manner that allows for safe responses to unforeseen circumstances.

Therefore, this cautious approach balances the operational efficiency of moving trains with the imperative of maintaining safety, making it a fundamental principle within railway operating rules.