Fascinating stuff. Still trying to figure out how it works exactly but something to keep your eyes open about. Check out the link
Copenhagen Wheel and the teaser.
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"Smart, responsive and elegant, the Copenhagen Wheel is a new emblem
for urban mobility. It transforms ordinary bicycles quickly into hybrid e-bikes that also function as mobile sensing units. The Copenhagen Wheel allows you to capture
the energy dissipated while cycling and braking and save it for when you need
a bit of a boost. It also maps pollution levels, traffic congestion,
and road conditions in real-time".