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DUI » DUI Testing » Field Sobriety Tests » One-Leg Stand (OLS)

One-Leg Stand Test

When a driver is pulled over by the police for suspected DUI the officer may ask the driver to perform various field sobriety tests. The One-Leg Stand (OLS) is one of the Standardized Field Sobriety Tests developed based on research conducted by the Southern California Research Institute and sponsored by the National Highway Traffic Safety Administration (NHTSA). The One-Leg Stand is a divided attention test.

The subject must listen to and understand instructions and perform physical movements. The arresting officer will instruct the subject to stand on one foot, with the other approximately six inches off the ground. The subject will need to count out loud by the thousands (i.e. “one thousand-one, one thousand-two, one thousand-three…”) until instructed to stop. The test should last for 30 seconds.

The officer will look for the following behavior that may indicate impairment:

  • Swaying;
  • Using the arms to maintain balance;
  • Hopping to maintain balance; and
  • Putting the foot down

According to NHTSA research, 83% of subjects who exhibit two or more of the above indicators will have an unlawful blood alcohol concentration of 0.08 percent or greater.

Did you take the OLS Test? Fight for your rights!

If you were pulled over for alleged drunk driving in the Tampa area, you may have been asked to perform the One-Leg Stand, as well as the Walk and Turn (WAT) and Horizontal Gaze Nystagmus (HGN). You may have also been asked to perform other field sobriety tests. Upon performing these tests, you may have been arrested for DUI and taken to the police station, where you were asked to submit to a breath or blood test.

Depending on your performance on field sobriety tests and the outcome of your breath / blood test, you may have been charged with driving under the influence. If this describes your situation, make sure you act immediately to involve an attorney who can provide you with experienced legal counsel. You have the right to a lawyer; choosing to exercise this right may mean the difference between a conviction and acquittal or dismissal of all charges.

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