Watch China's amazing zipper lane system open like a giant traffic unzipping machine
Imagine cruising down a Beijing expressway at 7 a.m. when, in a matter of minutes, a bright yellow "zipper truck" glides past. Its mechanical arms lift 1-ton concrete segments, shuffles them sideways, and suddenly an extra lane appears — pointing straight into the city center. By 6 p.m. the same truck returns, rolling a…
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