Audible feedback device

A transportation system cab, comprising:

• a cab body defining an interior and configured to travel between first and second locations and to accommodate one or more person in the interior while traveling;
• a standalone device, comprising:
• a mounting by which the standalone device is attachable to the cab body in the interior;
• a sensor configured to sense a location of the cab body;
• a speaker;
• and
• a processing board operably coupled to the sensor and the speaker,
• the processing board being configured to determine the location of the cab body from sensing results of the sensor and to control the speaker to audibilize a description of the location to the persons.

A method of retrofitting a cab of a transportation system, the method comprising:

• mounting a standalone device to a cab body in an interior thereof;
• driving the cab body to travel between first and second locations;
• determining a location of the cab body from sensing results of a sensor of the standalone device;
• and
• controlling a speaker of the standalone device to audibilize a description of the location.