There are five categories driving under the influence of drugs and driving under the influence of marijuana.

Field Sobriety Test, PAS, Blood, Breath, Urine

  1. Driving Symptoms: May involve weaving in and out of lanes and wreckless driving. Make sure to visit the National Highway Traffic Safety Administration for more indicators.
  2. DUI Evidence: Personal behavior and appearance play a major role in this category. Alcohol on the breath, bloodshot eyes, thick and/or slurred speech, flushed face, etc.
  3. Field Sobriety Tests: Also known as the Rhomberg test. Alphabet recitation, horizontal gaze nystagmus (following an object such as a pen or finger from side-to-side with your eyes), fingers-to-thumb, hand pat, etc. Most officers in California use the test of their choice. Recently, many officers have begun using the roadside breath test device. The Preliminary Alcohol Screening (PAS) units, also called Evidential Portable Alcohol System(EPAS), indicate the blood alcohol concentration. PASĀ tests are not legally required (unless you are under 21 years of age).
  4. Incriminating Statements: The officer is free to ask incriminating questions during his initial investigation, since the Miranda warning does not need to be given until after arrested.
  5. Blood Alcohol Test: The test involves a choice of either a breath or blood test.

For more information, please visit the Drunk Driving Law Center.