Which two conditions are indicated by the local indicating lights in the M-3 operating cab?

The local indicating lights in the M-3 operating cab are critical for providing the operator with immediate visual cues regarding essential functions of the train. The indicator lights specifically show the state of the brakes and the doors.

When it comes to brake application, the indicator light alerts the engineer that the brakes are engaged or being applied, which is pivotal for maintaining control of the train during operation. Additionally, the door state indicator informs the operator whether the doors are open or closed, ensuring that the train is properly secured and safe for passenger boarding and alighting. This information is particularly important for ensuring compliance with safety protocols and operational efficiency, as the operator needs to know the status of both systems to make informed decisions while the train is in service.

Other options may reference aspects like engine performance, power availability, and air pressure; however, these are not solely indicated by the local lights in the M-3 cab. The specific focus here remains on the indicators related to braking and door operation, which are key elements of safe and effective train operation within the M-3 system.