Scientists in Poland may have come up with a powerful new deterrent to drunk driving. It's a laser-based device that can detect alcohol vapor--like that exhaled by someone who's been drinking--inside a car as it passes by.
The device works by detecting subtle changes in the laser beam as it passes through the alcohol vapor.
"We all are already familiar with laser instruments used by the police for speed-limit enforcement," Dr. Marco Gianinetto, a Polytechnic University of Milan researcher who has no connection to the Polish research, said in a written statement. "In the future, a similar technology may be developed to detect different chemical compounds, enabling the detection of drivers under the influence of other intoxicants."