As a driver, you must give way to pedestrians who have entered or are about to enter an unsupervised pedestrian crossing, which is a pedestrian crossing that is not equipped with traffic signals.
If you are unsure whether a pedestrian intends to cross a pedestrian crossing or not, you must slow down or stop completely until you are absolutely sure of the pedestrian's intention. By making eye contact with a hesitant pedestrian, you are usually able to understand what he or she intends to do.
You must never wave on a pedestrian or cyclist waiting at a pedestrian crossing as that can lull the person into a false sense of security. In the worst case, this can lead to them crossing without paying attention to traffic coming from another direction.