SJ Regional trains are operating on many lines in central Sweden. Despite their name, trains often run over quite long distances and make only a few intermediate stops - this is due to the sparse population of the Swedish countryside.
The trains mostly consist of either the modern X40 double-deck EMU or classic loco-hauled carriages. All trains convey comfortable 2nd class seats, however 1st class seats are not available on all services. Power sockets are available on most services, while Wifi is only available on the X40 which mostly run on services starting in Stockholm. Some services (eg from Göteborg to Kalmar) also have a bistro compartment.
Stockholm - Västeräs - Örebro - Hallsberg - Göteborg | Stockholm - Arboga - Örebrö | Stockholm - Uppsala | Göteborg - Karlstad | Göteborg - Kalmar | Gävle - Stockholm - Linköping