What is the right course of action in this situation?

You answered correctly by choosing to continue driving as before. According to German traffic rules, when approaching a situation like this—such as a lane closure indicated by signs and traffic cones—you should maintain a steady and controlled speed if it is safe to do so. Abrupt braking is not necessary unless there is an immediate danger. Staying calm and following the instructions given by traffic signs ensures smooth traffic flow and safety for all road users. Taking photos of accidents while driving is prohibited and unsafe, so it is not an appropriate action. In short, the correct behavior is to observe the signs, adjust your speed carefully, and proceed without sudden maneuvers. This approach helps prevent rear-end collisions and traffic jams in construction or incident areas.