You are driving on a road that has several marked lanes going in one direction. When should the alternate merging procedure be employed?

In this scenario, the alternate merging procedure is relevant in traffic situations where one lane is no longer available for use by vehicles. The correct combination of choices shows that the alternate merging procedure should be used when a lane comes to an end or if an obstacle restricts the flow of traffic in one lane.

In German traffic regulations, the alternate merging method helps ensure smoother traffic flow and safety when vehicles need to merge into a single lane. It emphasizes the importance of cooperation and communication among drivers, allowing them to take turns merging into the available space.

The third option, regarding a merging lane ending on the motorway, is not part of the correct answer because the specific concept of alternate merging is not directly applicable to that situation; instead, other merging rules and protocols would be considered. Understanding these distinctions is important for safe driving practices on the roads.