What is the primary purpose of a "train timetable"?

The primary purpose of a train timetable is to inform passengers of train routes and times. Timetables serve as essential tools for both operators and passengers, providing clear schedules that indicate when trains are expected to depart and arrive at various stations. This information is crucial for planning journeys, ensuring that passengers can coordinate their travel plans effectively. A well-organized timetable helps streamline train operations, enhances service reliability, and improves overall passenger experience by allowing them to anticipate travel times and connections.

While other options may relate to certain aspects of train operations, they do not encapsulate the primary function of a timetable aimed at passengers. For example, recording train speeds and tracking fuel consumption concern operational metrics rather than passenger information, while maintenance schedules focus on the upkeep of equipment rather than providing travel details to users. Therefore, option C stands out as the most relevant and accurate choice regarding the function of a train timetable.