A robotic bike park
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Inside an underground Japanese robotic cycle park

Tokyo has many cyclists but limited space for parking bicycles on the city's crowded streets and pavements.

The solution is to park your bike underground. Spencer Kelly goes behind the scenes to see how an underground robotic bike park works.

Watch more clips on the Click website. If you are in the UK you can watch the whole programme on BBC iPlayer.

Go to next video: Testing the bicycles of the future