Siemens’s eHighway Pumps Up an Old Concept

The two-way system supplies energy to a diesel-electric truck through the catenary, just like a conventional trolley system. The new twist is that it also reclaims energy from the truck through regenerative braking. Regenerative braking is a system for capturing energy from friction that would otherwise go to waste as heat. Regenerative brakes are becoming commonplace for vehicles, elevators, shipping cranes, and other mechanical devices that stop frequently.