CLEET Law Enforcement Driver Practice Test 2026 – Comprehensive Exam Prep

A common sign of impaired driving is demonstrated through erratic behaviors that indicate a lack of control or cognitive function. Inconsistency in speed and abrupt or unpredictable lane changes suggest that the driver is struggling to make sound judgments, which is often associated with impairment. These behaviors are noticeable alterations from standard driving patterns that exhibit alertness and coordination, which are critical for safe operation of a vehicle.

The other choices describe behaviors typical of a driver who is attentive and following traffic rules. Consistent speed and lane discipline reflect a driver who is in full control of their vehicle, while excessive use of turn signals typically indicates a conscientious driver who is signaling their intentions clearly. Frequent stops at green lights may suggest caution or confusion but do not inherently indicate impairment in the same way that erratic changes do. Therefore, the identification of erratic lane changes and inconsistent speed serves as a clear indicator of potential impaired driving.