The largest-scale test of whether lives could be saved by giving cars the ability to communicate with each other on the road got under way here Tuesday in a program that could steer the future of U.S. auto safety regulation. For the next year, about 3,000 Ann Arbor residents will go about their daily driving in cars outfitted with electronic gear that tracks their vehicle’s location and the locations of other similarly-equipped vehicles. If two vehicles appear to be on a collision course, alarms will chime—or in some cases a machine-generated voice will issue a warning. Read the full story at the Wall Street Journal.