AI put in charge of setting variable speed limits on US freeway

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. Normally, rule-based systems monitor the number of vehicles on one of…