Toyota doubles size of headquarters in Plano, adds demo track

The new Toyota North American headquarters in Plano has grown to more than 2.1 million square feet — about twice the size initially proposed, according to plans the automaker submitted to the city.

A Toyota spokesman confirmed that the campus “will likely be larger than originally reported.”

“We continue to make great progress on our relocation efforts,” said a statement released Monday by spokesman Javier Moreno. “While we are still in the planning stage and no final decisions have…