Subways Powering Subways

The New York Times reports on an experiment using flywheels to convert and store the braking energy of subway trains approaching stations and release it back into the electrical system in a regulated way. The system could save up to 20 million tax payer dollars a year in electricity costs and would help relieve a lot of the heat subways generate. Between Bloomberg’s budget cuts and the sweltering stations in July, this is a beautiful thing.

Found via Slashdot.