The car project, dubbed Titan inside the company, has been in limbo for the past several months as Apple executives grappled with the reality that its vision for a fully autonomous vehicle -- without a steering wheel or pedals -- isn't feasible with current technology. In a significant shift for the project, the company is now planning a less-ambitious design that will include a steering wheel and pedals and only support full autonomous capabilities on highways, said the people, who asked not to be identified because the information is private. The latest changes underscore the challenge Apple faces in pushing into an entirely new product category and taking on technological obstacles that have bedeviled some of the world's biggest companies. The secretive project, underway for years, is meant to provide Apple with another major moneymaker, but it also could test the limits of the iPhone maker's capabilities.