Terms and Definitions Related To Drinking and Driving. Terms and Definitions Related To Drinking and Driving.

 

 

 Field Sobriety Test (FST)
 

Field Sobriety Test (FST)

Any number of tests used by law enforcement officers, usually on the roadside, to determine whether a driver is impaired. Most FSTs test balance, coordination and the ability of the driver to divide his or her attention among several tasks as once. Other tests, such as the horizontal gaze nystagmus test, are used to measure a subject's impairment level.

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