Chris Urmson, in a blog entry late Friday, said he was "prepared for a new test." He said he was not certain what he would do next.
"Going to take some time and get some point of view from outside of Google," he wrote in an instant message to Reuters.
Urmson told Reuters not long ago that self-driving autos are coming. "I've gone from trusting this would happen to supposing it may happen to knowing it will happen," Urmson said.
Google self-driving auto venture representative Johnny Luu affirmed Urmson's flight and commended him.
"Seven years back, the possibility that an auto could drive itself wasn't considerably more than a thought. Chris has been an indispensable power for the task, helping the group move from an examination stage to a point where this life-sparing innovation will soon turn into a reality," Luu said.
Google's undertaking has had other noteworthy takeoffs, even as it has procured many new workers. Prior this year, Anthony Levandowski, who was item chief for Google's self-driving auto program, left the task to help establish a startup with two other previous Google workers.
Google's self-driving auto venture is relied upon to end up a standalone organization this year. In July, the task delegated its first broad advice.
Google has logged more than 1.8 million miles of self-ruling driving in testing in Texas, California, Arizona and Washington state. It has said it has no timetable for making self-driving vehicles accessible to the general population.
Authorities have said Google is planning to make its self-driving auto unit a different organization. The project is currently some portion of its X research lab unit.
"The self-driving auto venture is sincerely busy moving on from X and this is kind of a continuous procedure," Astro Teller, who heads the X program, told NBC News in April.
In May, Google and Fiat Chrysler Automobiles NV said they had consented to cooperate to fabricate an armada of about 100 self-driving minivans, the first run through a Silicon Valley firm had collaborated with a customary carmaker to build up a self-governing vehicle.
In March, Reuters reported Google's self-driving auto group was extending and procuring more individuals with car industry aptitude, underscoring the organization's determination to move the division past the trial stage.hris Urmson, who was instrumental in building Google's self-driving auto venture, said on Friday he is leaving the group following seven and a half years.
Letters in order Inc's Google had named Urmson boss specialized officer of the venture after it contracted previous Hyundai official John Krafcik to be CEO of the task.
Urmson, who joined the task when it was dispatched and has been an open face of Google's self-sufficient vehicle endeavors, affirmed before a U.S. Senate board on self-sufficient autos in March.
Krafcik affirmed Urmson's flight in a tweet on Friday evening.