The company also is developing four-wheel-drive technology that powers two wheels with an internal combustion engine and two with an electric motor, eliminating the need for a drive train that takes up floor space, Ho said.
When the train stopped at a station in that country, the police dragged Narayana off the train and put him in a small eight-foot-by-eight-foot room with a cold stone floor and a hole in the corner that served as a toilet.