Direct current, or DC, is a type of electrical current that only flows in one direction. In contrast to alternating current, or AC, which, depending on the supply's frequency, switches direction ...

Despite all sorts of tribulations -- deaths, retirements, disabilities -- AC/DC is still riding its highway to hell, which means heaven for hard rock fans. The group makes its first Cleveland ...

ISSUE: Railinc’s analysis of the North American locomotive fleet reveals that the size of the total fleet increased slightly ...