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Tech Gadgets Innovations on Instagram: "The zipper merge may look messy to outsiders, but in China it’s a high-efficiency traffic strategy synced across behavior and machines. Instead of squeezing into one lane early, cars use every inch of road until the merge point — then alternate in a clean left-right rhythm. The result? Smoother flow and up to 10% more throughput. Key to the system are Road Barrier Transfer Vehicles, known informally as Zipper Trucks. They glide down highways moving concret

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