Opel Side Blind Spot Alert (SBSA) system is a technology designed to assist a driver to avoid dangerous situations or collisions with other road users during a lane change. Ultrasonic sensors scan the area to the side and diagonally to the rear of the vehicle. At speeds up to 140km/h, the system will indicate to the driver if there is a vehicle driving in the so-called ‘blind-spot’. An indicator light in the door mirror will warn the driver if a vehicle might be invisible in the blind spot on that side. If the driver uses a direction indicator when another vehicle is within the danger zone, the warning indicator starts to flash. The system will monitor both sides of the vehicle, so that it will support the driver when he intends to overtake as well as when he is being overtaken, to ensure that the car can be safely returned to its lane. The system works in almost all weather conditions and detects all types of vehicles, including motorcycles.