On a semi-trailer, what is the required distance, , between the driver’s cab and the front wall of the trailer?

1. A distance allowing free movement of the braking system’s air pipes, and not more than 50cm.
2. The distance depends on the length of the cab and the position of the fifth wheel and should not be less than 400 cm.
3. Correct answer: A distance in which both can move in all directions without touching each other, and that allows free movement of the connectors during maximal turn.
4. The distance between the trailer and the cab should not be more than 150 cm.

WhyThere must be enough room between the tractor's cab and the front of the semi-trailer for them not to touch, and for the connectors to move freely even in the sharpest turns.