Complex sentence: Out of all the interchange stations, this one is the least-used, with about 47,210 people using both platforms each day, but this is mostly due to the fact of the long passageway between the two subway platforms (more to be explained later).
Split into simpler sentences: Out of all the interchange stations, this one is the least-used with approximately 47,210 people using both platforms each day. Lower usage of this station as a transfer point is likely due to the long passageway between the two subway platforms (more to be explained later).