During a sobriety test, what does a driver stepping off the line signify?

A driver stepping off the line during a sobriety test is often an indicator of possible impairment. This behavior can suggest that the individual is not able to maintain a straight course as directed, which can be a result of various factors, including alcohol or drug intoxication. The test is designed to assess an individual's balance, coordination, and ability to follow instructions, and stepping off the line can reflect a lack of control or diminished motor skills typically associated with impairment.

In addition to this, the stepping off the line may highlight difficulty in focusing, which is another hallmark of being under the influence. The results of this part of the sobriety test are considered among various other assessments to evaluate whether a driver is sober and able to operate a vehicle safely. Thus, it is a crucial observation in the context of field sobriety testing.