I am trying to find timetables for this route which I believe is route D , but I cannot find any information regarding the first and last trains. Merci.
First train leaving Gousainville towards Paris leaves at 05:01 on weekdays, 05:04 on Saturday, 05:11 on Sunday. Last train from Gousainville to Paris departs at 23:11 on weekdays, 00:11 on Saturday / Sunday.
First trains leaving Paris Chatelet les Halles towards Gousainville depart at 05:18 Monday-Friday, 05:34 Saturday, 05:40 Sunday.
Last trains leaving Paris Chatelet les Halles towards Gousainville depart at 23:18 Monday-Friday, 00:48 Saturday and Sunday.
Paris RER D 2019 weekday schedule
Paris RER D 2019 weekend schedule