Nissan's next-generation Leaf EV will be its first car featuring its ProPilot driver-assist self-driving technology. The system will be activated by a button on the steering wheel and will control acceleration, braking and steering. The ProPilot system consists of a suite of assists, semi-autonomous functions and is designed mainly for highways, and not for busy city traffic. The company has been testing the system in Japan for some time and now and it is ready for a rollout in North America and Europe. "In the coming years, Nissan's ProPilot technology will offer increasing levels of autonomy, with the system eventually able to navigate city intersections. Set to help make driving more secure and more enjoyable, ProPilot Assist is part of Nissan Intelligent Mobility, the company's blueprint for transforming how cars are driven, powered and integrated into society," the company said in its press release Thursday.