When is a driver is suspected of being under the influence, cops simply use a variety of tests to read gauge their level of intoxication, otherwise known as blood alcohol level (BAC). This includes breathalyzer tests, which have been used since the early 1930’s, as well as, field observation tests and blood tests. Having a blood alcohol level higher than 0.08% will get you a drunk driving charge, which is a serious criminal offense in Indiana. Sadly, the majority of fatal car crashes are alcohol-related. Regulating blood alcohol levels is easy to do, and has been for quite some time, however, the story is not so similar in terms of driving high.
Driving HighCurrently in Indiana, there is not an accurate, roadside equivalent test for marijuana, but there is a zero tolerance policy for driving high. And although it is more difficult to test for cannabis during a routine traffic stop, it may be possible. Officers are trained to look for a wide range of visual, physical, and behavioral signals that are known indicators of intoxication. This includes impaired speech, bloodshot eyes, lack of focus, odd behavior, residual marijuana smell (or smoke), and more. They can also implement standardized field sobriety tests (horizontal gaze nystagmus, walk and turn test, one-leg stand) to gauge a person’s reflexes and agility.
There are a variety of roadside oral fluid testing devices being tested by select law enforcement departments. These devices basically swab a person’s saliva, but they are not yet proven or even approved methods of measuring THC in Indiana. In states where recreational or medicinal marijuana are legal, it is allowed to drive with a certain, pre-determined level of THC, or Tetrahydrachloride (the chemical in cannabis that appears on drug screens). For example, Colorado allows up to 4 nanograms of THC in a drivers system, legally. Anything higher is considered intoxicated driving.