Power booster
When in the front pulled and rear pushed mode, one or more tractors ahead of the trailer, and the power booster behind of the trailer, before the trailer runs to a narrow S-shaped bend road, the driver can start the Power Pack Unit. Once the frontal tractor no longer has sufficient power to manage the incline, i.e. the speed drops below 14km/h, the driving gear starts automatically, thus providing sufficient thrust. The additional driving gear also switches off automatically once the incline...