A notable symbol of that retrenchment is a self-driving shuttle service that ferries employees from one Apple building to another. The shuttle, which has never been reported before, will likely be a commercial vehicle from an automaker and Apple will use it to test the autonomous driving technology that it develops.

Five people familiar with Apple’s car project, code-named “Titan,” discussed with The New York Times the missteps that led the tech giant to move — at least for now — from creating a self-driving Apple car to creating technology for a car that someone else builds. They spoke on the condition of anonymity because they were not authorized to talk publicly about Apple’s plans.