Complex sentence: It will initially be accessed via stairwells, 22 elevators, and 47 escalators connecting to Grand Central's existing food court, in comparison to the 19 escalators in the remainder of the LIRR system.
Split into simpler sentences: It will initially be accessed via stairwells, 22 elevators, and 47 escalators connecting to Grand Central's existing food court. By comparison, there are 19 escalators in the remainder of the LIRR system.