Daisuke Wakabayashi, writing for the Wall Street Journal:

Steve Zadesky, a 16-year Apple veteran who has been overseeing its electric-car project for the last two years, has told people he is leaving the company. The timing of his departure isn’t clear. He is still at Apple for now.

And:

Mr. Zadesky, who worked on the iPod and the iPhone during his career, was given permission in 2014 to start investigating Apple’s entry into the electric car market. Last year, Apple designated the initiative—code-named “Titan”— a committed project and set a ship date of 2019.

And:

An engineer at Ford Motor Co. before joining Apple in 1999, Mr. Zadesky was in charge of tripling the size of the automotive team—already at around 600 employees in September—while coming up with a vision for the product.

The team has encountered some problems, according to people familiar with the matter, in laying out clear goals for the project. Apple has urged the team to push ahead with ambitious deadlines even though some on the team felt that those targets weren’t attainable, these people said.