Toyota Motor Corp., the world’s top seller of gasoline-electric autos and the second top automaker worldwide, may turn its mighty Prius into a full line of vehicles. This move is intended to triple its hybrid sales in the United States.

US will account for more than half a million hybrid cars and light trucks. According to Jim Lentz, executive vice president of Toyota U.S. sales unit, “The automaker plans to sell worldwide each year by early next decade. Prius-based models might include a wagon and a smaller car.”

“For us to do 600,000, there will probably have to be Prius and derivatives of Prius that are selling in the neighborhood of 300,000 to 400,000. We don’t have any plans to do that right now, but that’s the direction that nameplate can go, because it is that strong,” Lentz said at the Specialty Equipment Market Association trade show in Las Vegas.