Laser can detect alcohol in a moving car

Researchers have developed a laser device that can detect the presence of alcohol vapours inside a moving car. The laser system, developed at the Military University of Technology in Warsaw, is set up on the side of the road to monitor each car that passes by. If alcohol vapours are detected in the car, a message with a photo of the car including its number plate is sent to a police officer waiting down the road. Then, the police officer stops the car and checks for signs of alcohol using conventional tests. Obviously this will also detect sober drivers who have drunk passengers in the car. It's not fool proof though, drivers can defy detection by leaving windows open to disperse the fumes, and use solar screens on the side windows to deceive the system. But it may make people think twice before getting into the drivers seat whilst intoxicated and we know that 12% of all UK road fatalities are caused by drink driving.