Emty autotrain before loading.Here some informations about this autotrain:
The BLS - Auto-Train brings the cars from the Region of the Bernese Alps through the Lötschbergtunnel into the Region of Valais.
The Tunnel is about 14.6 km in length, built ca. 1906 - 1913.
The train is pushed to the Valais and pulled back to the Bernese mountains by the lokomotive, such as the Re4/4 in this picture.
On the backside of the train is a controlcar, which takes control over the engine and train in push modus.
There are several different cars, so take a look at the homepage of the BLS fans: http://www.bls-info.ch/.