Most of the passengers emerging from the station in Bellvitge, a working-class neighborhood outside Barcelona, have no idea just how innovative the city’s subway system is. Using technology not unlike ...

A new battery-supercapacitor hybrid system will go online soon in Philadelphia, aimed at providing split-second power on-demand to the entire city and running the subway network at the same time.

Regenerative braking is a key feature in hybrid and electric vehicles (EVs) that enhances efficiency by converting kinetic ...

While it may seem like electric and hybrid vehicles are a recent innovation of the 21 st century, these technologies have been around for over a century. The first electric car, while extremely rough ...