Louisiana Class D Chauffeur's License Practice Test

Erratic driving behaviors, such as swerving or sudden braking, are significant indicators of a driver being under the influence of drugs or alcohol. When a driver is impaired, their physical and cognitive abilities are compromised, which can lead to a lack of coordination and unpredictable maneuvers on the road. This erratic behavior may manifest in various ways, including drifting out of a lane, abrupt changes in speed, and difficulties in maintaining a straight course. These patterns of driving can be alarming to other road users and are often utilized by law enforcement as behavioral cues that signal potential impairment.

In contrast, driving at posted speed limits, using turn signals appropriately, and maintaining a consistent speed are typically indicative of a sober and responsible driver, not someone who is under the influence. Such behaviors reflect compliance with traffic laws and indicate the driver's ability to operate the vehicle safely.