According to the New York Times, sleepy drivers caused more than 800 accidents in 2015. Even with enhanced safety measures like stability control and collision sensors, a driver who is dozing off behind the wheel is a hazard. Makers including Audi, Mercedes, and Volvo are solving the problem with detection systems that monitor how well you’re staying in your lane, along with how long you’ve been driving—a coffee cup icon will pop up on your dash if the car thinks it’s time for a break.

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