Being kept informed and aware are very important elements when driving. In earlier years, the driver only had a few instruments to monitor and to make things easier, warning lights were used so they would only give an alert when something went wrong. Then with electronics and miniaturization increasing from the 1980s, more meters could be inserted on the instrument panel to monitor more areas.

However, many meters were still physical and the number that could be installed was limited. Some even went onto spaces on the dashboard so the driver had to look at two areas. Slowly, the amount of information grew, and there was also more emphasis on being aware of what was going on outside for safety. So the driver began to have a lot of information to view, absorb and process and unlike computers that kept increasing their processing power.

This led Volvo to develop IDIS – Intelligent Driver Information System – an approach which was introduced in the S40 in 2003. IDIS was to prevent information ‘overload’ so the driver would not be distracted while driving but still be alerted if there was something important relating to the car’s operation. The system worked by prioritizing the information and services in the car, depending on the current driving situation. If necessary, the system would delay information during times when the driver was in a situation of higher ‘workload’. However, information vital to safety was never delayed and even the delays were maximum 5 seconds.