Car Makers Hunger for Self-Driving Tech

General Motors Co. GM -1.12 % 's proposed purchase of tiny Cruise Automation Inc. for more than 1 billion would be one of the auto industry's biggest Silicon Valley acquisitions to date. And it would certainly not be the last. Auto makers and car-parts suppliers have hooked into tech startups in recent years to boost their in-vehicle connectivity and to accelerate autonomous-car development. The Bay Area already is dotted with auto-industry outposts funding or recruiting Silicon Valley engineering talent to keep pace with Alphabet Inc. GOOGL -0.36 % 's Google X and others working on self-driving cars. Carol Reiley, president of Bay Area autonomous-driving startup Drive.ai, said her company, which like Cruise Automation and Zoox has been operating under the radar, just raised 12 million from venture-capital investors.