The network has two hubs, Bulle and Fribourg, and began operating in 2011 (14 years ago) (2011).

The RER Fribourg network began operation with the 11 December 2011 timetable change.

The RER Sud portion of the network was simplified: the S51 and S52 were eliminated, with the S50 running on an hourly schedule between Palézieux and Montbovon.

The hourly S60 was extended from Bulle to Palézieux on peak periods, combining with the S50 for half-hourly service.

[5] The 2017 changes to the southern part of the network were largely reversed in December 2019, with the S50 and S60 again terminating at Bulle.