What does a black box do in a car?
A black box is a small GPS unit in a car that sends information to your insurance company, so that you can potentially pay lower premiums.
The insurance company takes data from the car such as how fast you drive, how harshly you accelerate and brake, when the car is driven and how far you travel. Basically, the way you drive and the risk of having a crash is assessed using this data.
Some insurance companies can now measure drivers’ performance using a smartphone app, instead of installing a physical black box.