When operating in MATC mode, what should a train operator do when yellow flags/lamps are displayed?

When operating in MATC (Micro-Automated Train Control) mode, the display of yellow flags or lamps indicates that there is a need for caution. This caution is typically in response to a specific condition on the tracks ahead or for safety reasons, such as an obstruction or maintenance work.

Taking manual control and complying with the flagging signals enables the train operator to ensure the safety of the train's operation. By manually controlling the train, the operator can respond more dynamically to any unforeseen circumstances while adhering to the restrictions indicated by the flags or lamps. This procedure is crucial for maintaining safety and preventing accidents.

In contrast, the other options do not prioritize safety. Increasing speed cautiously might lead to unsafe conditions; continuing to operate without changes ignores crucial signals meant for the operator's attention; and notifying passengers of a delay, while considerate, does not address the immediate need to operate the train safely under the displayed flags. Therefore, the most responsible action is for the operator to take manual control and comply with the flagging instructions.