The company was renamed to Transports de la région Morges-Bière-Cossonay (MBC) to express its other activities, mainly in local and regional bus services.

This branch line faces towards Bière and any traffic from the Morges direction has to reverse to gain access.

In more recent times a short 2 km (1.2 mi) branch line has been built from a point about 1 km (0.62 mi) prior to Bière to serve a Swiss army installation and this provides military traffic for the railway, in particular trains of tanks carried on standard gauge flat wagons mounted on metre gauge carrying trucks.

Built for the opening of the main line section the BAM possessed three tender locomotives of the type G 3/3.

The 6th and final steam locomotive in the fleet, HG3/4 No.7, bought second-hand in 1941 from the Furka-Oberalp Railway, was again a product of the SLM, works No.

(Note: There was no No.5 in the fleet list) Abbreviations Services are normally provided by electric railcars of class Be 4/4, hauling either voiture pilote (driving trailers), delivered in 1982 and built by ACMV/SAAS, or coaches, or both.

The two standard gauge shunting locomotives still sport their SBB red livery (at June 2010) and it is not known if they are to be repainted in BAM Green A fatal accident took place on 27 October 1997 when a train heading towards Bière collided with a tractor at a level crossing near Bussy-sur-Morges.

From December 2004 the BAM, along with TL, LEB, CarPostal Suisse and CFF became part of a joint fare system, called Mobilis Vaud.

From December 2009 this fare system will be extended to cover the Riviera and North Vaudois and in the following year to Nyon and Gland.