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if i could have invented one thing made in the past few decades, it would be highway rumble strips. those things are the greatest. so simple. so clever. so effective. can you imagine how many lives they have saved? there is no way it is not in the millions, the tens of millions even.
if you think that number is high, i would guess you have never had your car drift off the pavement into the dirt/grass/stone/whatever at 60 miles per hour (or better). maybe you were just distracted or maybe you had just fallen asleep. either way you would be challenged as hell to recover from the moment because to keep a car on the predictable cement and off the crazily unpredictable terrain next to the cement is what it's all about. once you're in the dirt, life gets real unpredictable real fast (and that tenet applies to more than just driving). and someone figured out a crazy-simple and super-effective way to keep you on that smooth and comfy asphalt. and not only does it let the occupants of the offending car know to get re-focused, the noise made alerts cars around the car floating out of their lane to be on alert for the driver that is droswy, distracted or messing with their phone. great on so many levels.
as far as life-saving goes, that has to be right up there with the most note-worthy medical advances seen over time.
i tried to look up who invented them and closest i got (not that i looked long) is some guy says his grandfather made them, or at least made the machine that makes them. not that receiving credit gets you much, especially if there are no monetary spoils (or you're dead), but it surely would have been satisfying to have divined something that saved, and therefore changed, so, so many lives.
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