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scroll&scroll on Instagram: "The video depicts orderly zipper merging on a rainy Wuhan highway at night, with drivers alternating turns to enter a closing lane, maintaining smooth flow without delays or aggression. User replies contrast this efficiency with chaotic driving in the US, Nigeria, and parts of Africa, attributing success to cultural discipline that prevents early lane changes and bottlenecks. Peer-reviewed studies, including those from Iowa State University, show zipper merging incre