after the station "mirabeau", the line crosses the seine via an underwater tunnel and reaches the station "javel – andré citroën" by way of a 40‰ ramp after passing under tracks of rer c. following this, the line follows "avenue émile-zola" to arrive at the stations "charles michels" and "avenue émile zola" before joining the "rue du commerce". when the line reaches the station "la motte-picquet – grenelle", the two tracks separate: tracks 1 are situated in a half-station with platform 1 of line 8 and tracks 2 service a half station but without tracks 2 of line 8 which are situated below. before arriving at the station "ségur", the line passes under the rapp intake. it then services the stations "duroc", "vaneau" and "sèvres – babylone". the line continues eastward and passes through the vacant station "croix-rouge", which was closed on 2 september 1939. finally, the line arrives at "mabillon".