The article «Stand - off detection of
alcohol in car cabins,» by Jarosław Młyńczak, Jan Kubicki, and Krzysztof Kopczyński of the Military University of Technology in Warsaw, details experiments
using an external laser device to detect the presence of
alcohol vapors inside of a moving car.
Inaccurate test results from a breathalyzer test due to the
use of mouthwash or breath strips, dental problems,
alcohol vapors in asthma inhalers, uneven
alcohol distribution in the blood, or residual mouth
alcohol;