During traffic congestion, what parts of the road infrastructure must be kept clear?

You selected both traffic confluences and pedestrian crossings, which is correct. During traffic congestion, you must not block road intersections or confluences, as well as pedestrian crossings. This ensures that other road users, especially pedestrians and cross traffic, are not hindered or endangered even when cars are stopped due to a traffic jam. Bus stops, however, do not have to be kept clear in the same way during congestion unless there is a specific marked area with special stopping rules. Remember, always leave intersections and crosswalks free so that traffic flow and pedestrian safety are maintained.