Daimler Buses introduces Active Brake Assist 4 generation as standard on all touring coaches

The ABA 4 emergency braking assistant for buses and coaches automatically initiates a braking manoeuvre for pedestrians

Bus, Coach, Braking assistance, Mercedes‑Benz, Setra, Preventing accidents
Daimler AG

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Daimler Buses is introducing the Active Brake Assist 4 generation (ABA 4) for all touring coaches. The Active Brake Assist 4 is the first emergency braking assistant for buses and coaches to automatically initiate a braking manoeuvre for pedestrians. In this case, all options are open to the driver: warn the pedestrian using the horn, evade them with the bus or carry out an emergency stop. The basis for ABA 4 is the multi-mode radar system with a combination of long-range and short-range radar. ABA 4 will become part of the standard specification of all touring coaches from Mercedes‑Benz and Setra in 2019. 

City buses will also benefit from the new Preventive Brake Assist system. The assistance system warns of a potential collision with moving pedestrians as well as with stationary or moving objects, and automatically initiates partial braking if there is a critical risk of collision. The warning cascade and the braking intervention are designed for operations in city traffic.This is why Preventive Brake Assist intentionally does not perform automatic emergency stops. This reduces the risk of injury for passengers in the bus, in particular for standing passengers. The driver still has the option of an emergency stop at any time.


Mercedes‑Benz and Setra are also launching Sideguard Assist, a turning assistance system for buses and coaches. Sideguard Assist operates in several stages: If there is a moving object in the side monitoring zone, the driver is given a visual warning. On the touring coaches, an LED in the shape of a yellow triangle lights up at the driver's eye level in the side mirror on the co-driver's side and in the instrument cluster. On the Citaro, it is integrated into the A0-pillar on the door side. The lamp draws the driver's attention intuitively towards the situation alongside the vehicle. If the sensors detect the risk of a collision, there is an additional visual warning in the form of a red triangular LED, as well as a vibration warning in the driver's seat. The centrepiece of Sideguard Assist is a radar sensor system with two short-range radar sensors on the co-driver side. They are located in the trim immediately aft of the right front wheel. The side monitoring zone has a width of 3.75 m. On the city bus, the system covers the entire length of the bus, complemented by two strips to the front and rear of about two metres each. On the touring coach, in addition to the entire length of the vehicle, an area of five metres in front of and up to 15 metres behind the bus is always covered.

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PMV Middle East - December 2018

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