What is the purpose of the zipper method in merging?

The purpose of the zipper method in merging is to alternate merging vehicles smoothly. This method promotes an organized and efficient way for vehicles to merge into a single lane, particularly when two lanes are about to become one. By allowing cars from each lane to take turns in a systematic fashion, it reduces the likelihood of abrupt lane changes and helps maintain a steady flow of traffic. This method minimizes delays and enhances safety by ensuring that drivers are aware that they need to yield to vehicles from the other lane.

The zipper method is particularly useful in situations such as highway on-ramps or construction zones, where merging is necessary and can often lead to confusion and bottlenecks if not executed properly. When drivers follow this technique, it also fosters patience and cooperation among motorists, contributing to overall road safety.