The Barcelona subway grinds to a halt, the doors slide open and commuters pour out to go about their daily business. Little do they know that as they do so, a burst of energy is sent up to street ...

Sixteen stations of Barcelona’s subway system are part of its new MetroCharge project, whereby the energy from the underground trains' brakes is used to power the trains and the stations ...

BARCELONA, Spain — (AP) — The Barcelona subway grinds to a halt, the doors slide open and commuters pour out to go about their daily business. Little do they know that as they do so, a burst ...

BARCELONA, Spain (AP) — Barcelona’s subway system is using regenerative braking to help power both its convoys but also recharge electric cars at street level. Sixteen subway stations in the ...