- A preliminary measure used by law enforcement officers to gauge suspicion of impaired driving due to alcohol or drugs. The test checks balance, reflexes, and mental clarity through various tasks such as walking a straight line, standing on one foot, or answering simple questions. Failure of this test often leads to a more accurate blood alcohol test at a police facility. If the driver refuses the blood alcohol test, the results of the roadside test can be used as evidence of impairment in court
- The officer conducted a roadside test after noticing the driver's slurred speech and unsteady movements.
- Suspecting the driver was under the influence of narcotics, the policeman opted for a roadside test.
- After noticing erratic driving behavior, the officer pulled the driver over for a roadside test.