What is the significance of multiple main tracks?

The significance of multiple main tracks lies in their ability to facilitate simultaneous train movements according to the established timetable. Having several main tracks allows trains to operate concurrently in different directions or on the same line without interference. This is particularly important for maintaining operational efficiency and safety, as it enables a higher frequency of train service, reduces delays, and optimizes the use of the rail network.

The other options do not capture the primary function of multiple main tracks. While equipment storage could happen on some tracks, that is not the main purpose. They are not limited to use during peak hours, nor are they exclusively designated for maintenance access. The main tracks are essential for regular train operations, making option B the most accurate reflection of their significance.