Pont–Brassus Railway

Passenger traffic on the line is operated by Swiss Federal Railways (SBB).

Lake Brenet used to drain naturally underground, although it now operates as a hydroelectric reservoir.

[3] As a result, the PBr was founded to extend the branch line further into the Vallée de Joux.

The economic crisis of the 1930s led to a marked decline in freight and passenger traffic; operations with steam locomotives proved to be too unprofitable.

Therefore, the track has been fundamentally modernised and a new timetable concept with modern rolling stock (SBB RBDe 4/4) has been introduced.

Vallorbe–Le Day–Le Pont–Le Brassus line profile
grey: SBB section
blue: Travys section
After the electrification in the Vallée de Joux, the SBB used Fe 4/4 18509 to 18511 railcars, which were equipped with regenerative brakes because of the large descent between Le Pont and Le Day.
The two light-metal cars Bi 475 (centre) und Bi 476 (left, in VST uniform orange [ note 1 ] ) of Seetal class procured by the Le Pont–Le Brassus Railway in 1950 together with the SBB.