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Tag Archives: Field Sobriety Testing

New Report: Field Sobriety Testing and THC Levels Not Correlated With Marijuana Intoxication

Every state has a law which prohibits driving under the influence of marijuana.  To enforce those laws, governments use roadside field sobriety tests to detect marijuana intoxication and laboratory tests to measure THC levels in blood and urine.  The use of these tests is premised on the belief that performance on field sobriety tests and THC levels are correlated with marijuana intoxication.  A recent study conducted for the United States Department of Justice shows that belief is wrong. Read More »

Just How Robust is the Horizontal Gaze Nystagmus Test?

What does it mean for something to be robust? Some of the synonyms of the word “robust” are strong, sturdy or powerful. In 2007 the National Highway Traffic Safety Administration (NHTSA) undertook a study to see just how “robust” or “powerful” the Horizontal Gaze Nystagmus Test was in the prediction of blood alcohol levels in humans. The study was titled “The Robustness of the Horizontal Gaze Nystagmus Test”, Southern California Research Institute, in conjunction with the U. S. Department of ... Read More »

Happy New Year and Buckle Up in Tennessee!

A recent amendment to a current Tennessee law will hurt offenders a little more in the wallet if they are convicted of driving without wearing a seatbelt in Tennessee. Tennessee Code Annotated § 55-9-603(a)(2) specifies the fines for driving without wearing a seatbelt in Tennessee. Since the law’s inception through 2015, a violation of this statute has been a Class C misdemeanor punishable by a $10.00 fine for the first violation, and a $20.00 fine for a subsequent violation. Payment ... Read More »