What are the signs of a driver under the influence?

A driver under the influence often exhibits noticeable signs that can be identified by their behavior on the road. Erratic speed, poor coordination, and uncontrolled movements are clear indicators of impaired driving. These symptoms reflect a driver's diminished ability to operate a vehicle safely, stemming from the effects of alcohol or drugs on their physical and cognitive functions.

Erratic speed refers to fluctuations in how fast the vehicle is traveling, such as speeding up and slowing down without reason, which can pose risks to other drivers. Poor coordination might manifest in difficulty steering, making turns, or maintaining lane position. Uncontrolled movements could include swerving, drifting out of lanes, or abrupt changes in direction, all of which indicate a lack of proper control over the vehicle.

In contrast, consistent speed and coordination, driving at the speed limit, and following all traffic laws suggest a driver is operating their vehicle responsibly and within legal parameters. These behaviors are typically associated with sober driving, highlighting the stark differences when a driver is under the influence.