The future of big rigs could lie in these overhead wires

Semi trucks are a fixture on the world's highways, transporting a significant portion of the world's cargo — and that's leading to a rash of innovation in the space that mirrors what's happening in the automotive world. Self-driving trucks, electric powertrains; you name it, someone's working on it. Siemens is working on something interesting, too: a pantograph system that would let big rigs drive for miles without sipping a single drop of diesel.
The system, which Siemens c