Taking on the drugged and drunk drivers - Technology / New Scientist, no. 2528, 3 Dec 2005

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Paul Marks
"Forget breathalysers and walking the line: tomorrow's drunk or drugged drivers could be rumbled by police officers wielding just such a gadget. And if the software says someone's psychomotor skills are as impaired as their driving suggests, a sliver of silicon will then be produced to indicate from a saliva sample just what they have been imbibing, injecting, smoking or snorting. " [Sub Required]