<P> Musk wanted the first three models to spell "S-E-X", but settled with "S3X" because Ford owns the trademark to "Model E". Making the next vehicle the Model Y means that the model names will spell "S3XY". </P> <P> Musk hopes to produce a car cheaper than the Model 3: </P> <P> There will be future cars that will be even more affordable down the road...With fourth generation and smaller cars and what not, we'll ultimately be in a position where everyone can afford the car . </P> <P> On July 20, 2016, Musk detailed his master plan for Tesla . It includes more affordable cars produced in higher volume, solar power roofs, mid-size vehicles, SUV's and pickup trucks, as well as the refinement of autonomous vehicles and the creation of a sharing economy, in which cars can be active while the owner is not using them . A Tesla Minibus would be built on the Model X platform . In May 2017, Musk indicated that he might favor a 10--12 - passenger version of the Model X over a dedicated minibus design . </P>

How many tesla vehicles are on the road