What is a "cutout switch"?

A cutout switch is indeed a device that allows for disabling certain systems for maintenance. This functionality is crucial in train operations, where maintenance work must often be performed on various systems without shutting down the entire train or system. By using a cutout switch, maintenance personnel can isolate specific components—such as electrical circuits or mechanical systems—ensuring that repair or inspection can be conducted safely without interfering with the operation of other systems. This enhances safety and efficiency during maintenance procedures, allowing trains to continue operating in a safer manner for both crew and passengers.

The other options do not accurately represent the function of a cutout switch. Enhancing train speed or adjusting train schedules relates to operation and scheduling systems, not maintenance devices. Monitoring passenger comfort is associated with passenger service systems rather than maintenance controls.