The
RER E (originally referred to as the EOLE, or
Est Ouest Liaison Express) is one of the five lines in the
RER rapid transit system serving , France. The line runs from the western terminus
Haussmann St-Lazare (E1) to the eastern terminuses
Chelles-Gournay (E2) and
Tournan (E4). It is operated by
SNCF.