While there are a number of field sobriety tests that an individual suspected of driving under the influence may be asked to perform, the National Highway Traffic and Safety Administration has decided upon three standardized tests that should be utilized when an individual is stopped under suspicion of driving under the influence:
o Horizontal Gaze Nystagmus (HGN);
o The Walk and Turn;
o The One Leg Stand;
A person with a DUI arrest in the state of Arizona may be required by ADOT MVD, or Arizona Department of Transportation,  Motor Vehicle Division to receive either an Alcohol Evaluation or a Drug Evaluation. To obtain a DUI Evaluation in the state of Arizona, contact Stonewall Institute in Phoenix, Arizona at 602-535-6468.