This video now is historical : it's clearly remarkable that the tram controller is limited to the fifth position on eight, So that the engines are Always connected in series. The parallel notches (from notch 6 to notch 8) were locked to reduce the streetcar speed for safety. This sistem was mainly use in Leoncavallo yard, but years after they were unlocked, since the safety was not really improved with this sistem. Now all the Peter witts of milan are unlocked, and all the notches are usable.

Mai togliere la mano dal controller non te l'hanno detto al corso quando facevi il patentino, almeno i 30 metri li rispetti