The driver's comfort and safety can be improved considerably by adaptive motor vehicle headlighting, with the today's technical means in lighting design and manufacturing, as well as sensors and communication systems in cars. The actual requirements for frontlighting devices, being established decades ago, do not permit for such variable devices, Therefore, within the frame of the Eureka project AFS the European car and headlighting manufacturers studied the possible specifications for such advanced requirements with the goal to submit a proposal for a draft Regulations. Within this project studies for adaptive headlighting requirements, practical tests with such variable headlighting devices had to be performed on the road and under real ambient and traffic conditions, as a sound base of experiences for the definitions - besides theory and laboratory investigations. The goal of the experimental system was fully reached. It could be shown that the lighting principles for the passing lighting modes as well as their combinations - despite being not performed that perfectly in all details as it would be done with serial products - have a very high acceptance from drivers as well as from opposers side. Even the famous additional 2 x 90 lx right side spot did not lead to a problem or complaints. This means, that the limiting values as chosen for illumination levels as well as for adjustment positions seem to be well tolerable. The rule 'more light - more shadow' (in this case: more dazzel) do not apply here if the adaptive passing lighting design strategy as described and tested is followed - a strategy, which, among other informations and data, may contribute to a base for the future approval scheme of such systems as to be proposed.