e/List of United States commuter rail systems by ridership

Information
has gloss	eng: The following is a list of all commuter rail systems in the United States, ranked by ridership. All figures come from the American Public Transportation Association's Ridership Reports Statistics for the fourth quarter of 2009, unless otherwise noted. Dates are given for all figures; the most recent available are used.
lexicalization	eng: List of United States commuter rail systems by ridership
instance of	c/United States regional rail systems