…of physical impairment, but mental impairment can never be disguised. If a driver is physically impaired but not mentally impaired, the physical impairment must come from a source other than…

…both mental and physical impairment, but mental impairment always occurs first. Physical impairment can be disguised by those with a high tolerance for alcohol, but mental impairment cannot be hidden….

…how alcohol affects the human body. Alcohol intoxication causes both mental impairment and physical impairment, but mental impairment always comes first. Physical difficulties can be hidden in individuals with a…

…use aspects of the driver’s performance on the test to show that he or she displayed no mental or physical impairment. Mental and physical impairment is at the heart of…

…impairment. Physical impairment can be masked by those with a high tolerance for alcohol, but mental impairment cannot be hidden. Therefore, the mere presence of physical impairment such as involuntary…

…of impairment in a marijuana-related case like in an alcohol-related case. Another reason is that the effects of marijuana on driving aren’t as recognizable or as distinguishable as an alcohol-related…

…officer testify about all of the ways that he or she believed that the driver drove improperly or unsafely due to his or her drug impairment. With respect to impairment,…

…a certain amount of narcotics or other drugs in the driver’s system do not automatically mean that the driver was impaired. The prosecutor must prove impairment by way of other…