www-chicagotribune-com-cdn-ampproject

Allstate spinoff Arity uses cellphone data to be high-tech backseat driver

In the auto insurance world, Gary Hallgren is Big Brother, watching more than a million drivers every day to determine who is likeliest to have an accident. Hallgren is president of Chicago-based Arity, a year-old Allstate tech startup that uses smartphone apps and add-on devices to track every move drivers make behind the wheel.