Most of the SJ Regional network was concentrated in the area around lake Mälaren. Operated with either Rc-hauled trainsets, X12/X14 or X40 EMUs. These trains have no catering on board. The X40 is equipped with free 4G WiFi. Both first and second-class are usually offered. Most of this network has been incorporated into the new Mälartåg franchise, although some services remain outside of it.
