Bringing hydrogen vehicles into wide use on the East Coast strained even Mr. Strizki’s talent for invention. On the West Coast, Arnold Schwarzenegger, the former California governor, who owned a hydrogen Hummer, cleared regulatory barriers with a pen stroke in 2004. The East has a series of bureaucracies to navigate. For instance, hydrogen is not authorized to travel via bridges and tunnels. “We wouldn’t want to put out a vehicle that you couldn’t drive into Manhattan,” said Gil Castillo, who tracks regulations at Hyundai Motor North America.Further, Air Liquide, a gas manufacturer, quietly built five ready-to-go stations …