Proterra, builder of electric buses, heavy-duty vehicle drivetrains, batteries and charging systems, plans to go public on the Nasdaq exchange via a merger with a special-purpose acquisition company (SPAC), the latest in a string of EV companies seeking access to public market financing to meet growing demand. Tuesday’s announcement sets the Burlingame, Calif.-based company on a course to merge with ArcLight Clean Transition Corp., with $415 million in private investment in public equity commitments led by Daimler Trucks, as well as Franklin Templeton, Chamath Palihapitiya, Fidelity Management & Research, and funds and accounts managed by private equity firm BlackRock.