AEBS stands for Advanced Emergency Braking System, a semi-automated braking system designed to help prevent collisions or to limit their consequences. As of legislation made last year all road trucks (over 8 tonnes) sold in the UK after November 2015 must have the system fitted.
Combined with FCW (Forward Collision Warning), DAF AEBS works via a radar signal produced from the front of the vehicle. This signal continuously measures if (in an emergency) there is enough room to prevent a collision with the vehicle in front. If the critical distance limit is exceeded, the system issues an initial visual and acoustic signal as a warning to the driver. No braking is applied by AEBS at this point, the driver is still in full control of the vehicle and should respond to the warning by increasing the distance between him and the vehicle in front.
If the driver fails to act on this warning AEBS comes into effect. The truck will decelerate as much as possible to prevent a collision or to minimise the impact if one does occur.
An attentive driver should never need to have AEBS and whilst occasionally hearing warnings, should never experience AEBS actively reducing the speed of the vehicle. AEBS is an emergency measure to reduce the chances of an impact, or the speed of a collision and should not be thought of as an "idiot-proof" way to drive a truck with paying full attention to the road ahead.
Keep driving as you would normally, giving vehicles ahead a safe amount of distance and you will never need to worry about AEBS.
DAF Trucks NV produced a video which visually explains what DAF AEBS is here:
And to get an idea of what AEBS looks and feels like in the cab, we produced our own video showing DAF AEBS in practice: