Drivers on a busy US freeway have been controlled by an AI since March, as part of a study that has put a machine-learning system in charge of setting variable speed limits on the road. The impact on efficiency and driver safety is unclear, as researchers are still analysing the results. Roads with variable speed limits, also known as smart motorways, are common in countries including the US, UK and Germany.

Wisconsin highway planners are studying the possibility of placing driverless vehicle lanes on I-94 to serve Foxconn's mega factory in Racine County. The Taiwanese company -- supplier to tech firms including Apple, Microsoft, and Nintendo -- reportedly made the suggestion at a meeting with regional officials, according to USA Today's Journal Sentinel. Foxconn's $10 billion midwest facility will span 20 million square feet and could create up to 13,000 jobs. That's an awful lot of humans commuting back and forth from work, and that's before you take into account the goods getting hauled in. But, seeing as the I-94 highway is getting a bump from six to eight lanes anyway, regional officials figured they were prepared for the uptick in traffic.