How Escalator Steps VANISH Flat at the Top

Watch an escalator step. At the top it flattens and slides away like it was never a stair at all. How?

The steps are solid metal. So how do rigid stairs turn into a flat, walk-off surface at both ends?

Every step has two sets of wheels, a front pair and a back pair, each rolling in its own track. In the middle of the escalator, the two tracks are held far apart, which tips each step forward and lifts its back edge into the familiar stair shape. As the steps near the top or bottom, the two tracks quietly slide together until they sit level. With the wheels now side by side, the step tilts back to flat. The step is never rebuilt. The tracks just change their spacing.

Here is the neat part: the steps never fold, hinge, or transform. They stay exactly the same shape the whole time. The magic is entirely in how far apart two rails choose to run.

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