Paris Chatelet les Halles This is the RER station Chatelet les Halles, where the RER lines A, B and D intersect. The lines A, B and D have their own tracks, but sometimes can use each other's track if necessary. This station has seven tracks, with four central platforms where one track can be entered on one side and exited on the other. Two metro stations adjoin the Chatelet Les Halles station, one being Chatelet (terminus of M11), and the other Les Halles, only for M4. taken May 1997 (C) 1997, 2005 Josh Hanz (josh_hanz@hotmail.com)