Forget the walk-and-turn field sobriety test; researchers have developed a laser that can detect drunk drivers remotely. A team at Warsaws Military University of Technology shined a laser beam through a moving vehicle, along with a reflective mirror that bounced back to a detector, to pick up alcohol vapors. With a system to simulate a drunk drivers breath, the researchers were able to detect blood alcohol concentrations higher than 0.1 percent.
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