General Motors is expanding its Super Cruise hands-free driving system to a whopping 400k miles in the US and Canada. We Googled it and the US alone has 3.9 million miles of roads, three quarters of which are rural. The expansion will include non-interstate roads and two-way highways.
The system features sensor and camera-based hands-free driving, HD maps, and system-to-driver communication. Currently, it covers about 200k miles of strictly divided interstate, but will remain off when turning or operating in a city. The update will be available over the air in the fourth quarter.