Toyota Motor Corp. has acquired the self-driving division of American ride-hailing company Lyft for $550 million, in a move that highlights the Japanese automaker’s ambitions in that technology. The acquisition, announced Tuesday, was carried out by Woven Planet Holdings, a Toyota subsidiary that began business in January and focuses on innovations and investment in projects such as “smart cities,” robotics and automated driving. The Woven Planet project will bring together an international team of engineers and researchers in mobility services, software and sensor assets and automated driving systems, according to Toyota.