Additional requirements for driving a train of high weight and length
Locomotives must be equipped with a crane operator's position with the VA, but in the case of putting the engines in the head and part (tail), trains - and even broken brake line signaling device with sensor number 418. Driving a train with locomotives at the head and part (tail), trains may be in the safe operating radio communications.
When driving a train of high weight and length increases the value of the electric (rheostatic and regenerative) braking system, which (if any) should properly act on all locomotives.