Google is developing self-driving cars led by Sebastian Thrun. By 2015, Google had tested 23 Lexus SUVs equipped with sensors like LIDAR and radar that allowed them to drive over 1 million miles on roads and highways without any accidents. While the technology is promising for reducing accidents and increasing mobility, there are challenges like sensors not working well in rain or snow and the high cost of the vehicles. Google is working with automakers to commercialize the technology and introduce self-driving taxis.