Starting last month, New York City began tracking about 400 people's driving habits, including how much gas they use, when they drive, where they are, and how fast their cars go. The program, called "Drive Smart," promises drivers discounts of up to 30 percent on their Allstate auto insurance, as well as "incentive rewards valued at $25," according to the program website.

The idea is to understand how people drive in the cityThe program will also collect data on when a driver breaks hard or makes a sharp, fast turn. The idea, according to the New York Department of Transportation, is to understand how people drive in the city, in the hopes of solving traffic problems including NYC's famous gridlock. Drivers can track their habits using three apps: Dash, Metropia, and Commute Greener.