Now, the newer lines are fully automated and have sliding glass doors that separate the platform from the tracks, a la Copenhagen, Singapore, and other leading metropolitan systems. This is line 14, at Chatelet.  Chatelet-Les Halles is an incredible morass to navigate (and one that I try to avoid at all costs, as it may very well take ten minutes to make one transfer), with five metro lines and three RER commuter rail lines intersecting at the world's largest underground station.

Photo courtesy of harry_nl  The Design of the Paris Metro by Tiffany Chu