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22 Φεβ 2018 · But for states where it is legal, levels and impairment are key to assessing whether the driver should be taken off the road. Some states rely on chemical testing alone and/or per se standards, such as with alcohol, even though blood level of cannabis is not directly correlated to impairment level.
WHAT IS A DRUG RECOGNITION EXPERT OFFICER? DRE officers, available in all 50 states, conduct a field sobriety test to assess impairment, and examine a driver’s physiological signs for markers unique to certain drug use, including marijuana.
29 Ιουλ 2024 · Currently, the two most common methods used to measure THC concentration to identify impaired drivers are blood and saliva tests, although there’s ongoing debate about their reliability.
14 Σεπ 2021 · To detect if someone is driving solely under the influence of marijuana, a trained DRE would look for whether the subject exhibits several indicators. Specifically, a marijuana intoxicated person would have an absence of both Horizontal Gaze Nystagmus (HGN) and Vertical Gaze Nystagmus (VGN).
29 Οκτ 2014 · By limiting the decline of THC in the body over time, standardization of testing conditions would enable police officers to more accurately determine a driver’s degree of impairment while driving. The rise in technology has led to the proposal of novel drug testing methods.
There is widespread agreement on the dearth of available valid roadside tests that assess cannabis-related behavioral patterns specifically, and an obvious need to develop such screening paradigms that index actual cannabis-related driving impairment, rather than mere intoxication that may be unrelated to such impairment.
Two main questions arise in the law surrounding driving after having ingested cannabis: (1) whether cannabis actually impairs driving ability, and (2) whether the common practice of testing for THC (the main psychoactive substance in cannabis) is a reliable means to measure impairment. On the first question, studies are mixed.
