CULVER CITY, Calif. — Union Pacific has expressed interest in a new autonomous battery-electric intermodal car concept developed by a group headed by three former Space X engineers. The concept under development by Parallel Systems would see intermodal containers carried by pairs of powered battery-electric wheelsets, moving in “platoons” of cars, but capable of splitting off to individual destinations en route. “We are interested in the Parallel System’s technology. It’s of keen interest,” Union Pacific CEO Lance Fritz told investors and analysts on the railroad’s earnings call Thursday. “But at some point it could be a technology that has utility for the U.S. rail network,” Fritz says.