A three-year, $5.9 million study in central Ohio will use drones to monitor traffic on a 35-mile highway, and provide new information used to prevent crashes between manned and unmanned aircraft.

Uber Technologies Inc. plans to deliver food by drone in San Diego as part of a wide-reaching commercial test program approved by the federal government May 9, CEO Dara Khosrowshahi said.

A who’s who of technology and aviation companies won U.S. approval to push the edge of the envelope in drone flights, from testing people’s tolerance for delivery devices hovering over their rooftops to ensuring farmers’ drones won’t hit crop dusters.

>Deliveries by drones took a step closer to being allowed in the U.S. after a federal advisory panel agreed on a framework for allowing law enforcement to routinely track the small devices.