The Las Vegas Review-Journal examines the dangers of drowsy driving and the new technology that can help prevent accidents.

The most common system is forward collision warning, in which cameras or lasers detect objects in the driver’s path and compute time to collision. These systems alert the driver by beeping, flashing light, and in some cases even braking for the driver.

A growing number of car companies, including Chevrolet and Mazda, offer these systems in their cars. Research suggests that these systems can reduce rear-end accidents by about 10%.

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