Google Inc’s self-driving cars will begin testing on public roads this summer, but it turns out they will have steering wheels and brakes, which is not what the company envisioned a year ago. Engineers will operate 25 prototype vehicles designed by Google, which use the same software as Google’s Lexus RX450h sport utility vehicles that have already self-driven about 10,000 miles (16,093 km) a week in recent months, the company said in a blog post. […]