Which of the following describes a "scheduled train"?

A "scheduled train" is defined as one that operates according to a fixed timetable, which means it departs and arrives at specific times that are predetermined and publicly available. This structured approach allows passengers to plan their travel with confidence, as they can rely on the train being at a particular station according to the established schedule. Scheduled trains typically follow a consistent route and frequency, making them an essential component of public transportation systems, allowing for efficient management of train operations and passenger flow.

In contrast, a train with no specific timetable lacks a defined schedule, making it unreliable for passengers. A train that operates at irregular intervals does not adhere to a set schedule, making planning more complicated. Finally, a train primarily for freight transport refers specifically to trains designed for carrying goods rather than passengers, which is a different classification altogether and does not inherently describe its scheduling.