Coming soon to a street (but probably not near you): an all-electric, autonomous bus. GreenPower Motor Company Inc., the Canadian-based electric bus maker with an assembly plant in Porterville, is partnering with a Virginia-based technology firm to make it happen. GreenPower and Perrone Robotics have teamed up to develop the first all-electric, fully-autonomous transit bus, with portions being built in both Porterville and the latter company’s Virginia headquarters. The EV Star shuttle, a 25-foot-long bus made by GreenPower, could be completed within 90 days, said GreenPower President Brendan Riley.