What device is typically used to time the One Leg Stand test?

The One Leg Stand test is designed to evaluate a person's balance and coordination, which can be indicators of impairment. To accurately time the performance of this test, a stopwatch is commonly used. This device allows the administering officer to measure the duration for which the individual can maintain their balance on one leg, typically for a period of 30 seconds. The precision of a stopwatch helps ensure that the timing is exact and consistent, which is critical for obtaining reliable results during the assessment.

Other timekeeping devices, such as a phone app or a wall clock, may not offer the same level of precision or convenience as a stopwatch. While these alternatives could be used, they may introduce variables that could affect the reliability of the test duration. A timer located in the patrol car can also be useful, but it may not provide the same immediacy and focus that an officer can maintain when using a handheld stopwatch. Therefore, the use of a stopwatch is the most appropriate and widely accepted choice for timing the One Leg Stand test during a DUI assessment.