When will we see electric trucks appear on major roadways? Potentially in September. Tesla is currently developing driverless, long-haul electric semi-trucks that can move in “platoons,” or closely knit packs. But some scientists, like Venkat Viswanathan, doubt that Tesla can fulfill its promises. According to Viswanathan, electric trucks are not economically feasible yet because they would require massive batteries to power their long distance road-trips across the country. “Your cargo [would] essentially become the battery,” he says in an article for the New York Times. And because of that, there would be little room to carry goods.