Complex sentence: It is frequently used by commuters going to and from the Manhattan neighborhoods of the Upper West Side, Washington Heights, Hudson Heights and Inwood; about a third of the station's daily ridership disembarks at Marble Hill to transfer to the subway.
Split into simpler sentences: It is frequently used by commuters going to and from the Manhattan neighborhoods of the Upper West Side, Washington Heights, Hudson Heights and Inwood. About a third of the station's daily ridership disembarks at Marble Hill to transfer to the subway.