no way ! you can ' t see or smell CO so how are you to know it was faulty ! ?<| sep |> I agree with you in regards to tailgating being an issue . However , I see two problems with this idea 1 . People are going to ignore that light , the same way they ignore half the other lights on their dash . A chime would help with this . 2 . People will follow the light as gospel , and will stop thinking about following distance at all . If the lightchime ' s not on , they ' re safe . If the light does come on , they ' ll react the way appliancedrivers do to any perceived threat and slam on their brakes . That will have horrible consequences in hightraffic areas , where abrupt braking causes shockwaves that turn into traffic jams . It also makes any such driver significantly more unsafe should they get into a car not equipped with a tailgate alert . As a side note , I believe this will all be alleviated soon within 20 years anyway due to adoption of autonomous cars . We ' re on the cusp of autonomobiles , and once the last few bugs get worked out , my suspicion is that nondrivers will adopt them as quickly as their finances allow them to .