When approaching a fixed signal requiring a Stop, how must Train 27D stop?

When approaching a fixed signal that requires a stop, Train 27D must stop before passing the signal. This requirement is in place to ensure safety and to comply with railway regulations that dictate how trains should respond to signals indicating a stop. Stopping before the signal allows the train crew to assess the situation and prevent potential collisions or unsafe conditions. It also provides an opportunity for the crew to receive further instructions or clearances if needed, ensuring that all operational protocols are adhered to while maintaining the safety of both the train and the railway network.

The other options suggest alternatives that could compromise safety, such as stopping at a station or a turnoff without a direct indication that it is safe to do so, or only stopping when other trains are present, which is not a standard procedure for signal compliance.