10 Great Safety Features Found In Modern Cars

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7. Back-up Sensors

Back-up sensors are small sensors installed in the rear bumper of a vehicle that assist in backing a vehicle up. When the car is placed in reverse, the sensors are activated. As the car rolls backwards, the sensors check for any obstruction behind the vehicle. Once one is detected, an audible tone will go off to alert the driver that they are close to something. Some systems have lights as well as tones. As you get closer, the light changes from green, to yellow, to red, indicating the proximity to whatever is behind the vehicle. Back-up sensors are helpful but can be flawed, as the sensors may not pick up things that are too high or too low behind the car. They should be used as an aid, and caution should still be taken when traveling in reverse.