The Visual Detection of DUI Motorists

Explanations of the 24 driving cues

Problems in Maintaining Proper Lane Position
Speed and Braking Problems
Vigilance Problems
Judgment Problems

1) Problems in Maintaining Proper Lane Position

Weaving
Drifting
Swerving
Turning with a Wide Radius

Weaving
Maintaining proper lane position can be a difficult task for an impaired driver. For example, we have all seen vehicles weaving before. Weaving is when the vehicle alternately moves toward [...]

Vigilance Problems

Vigilance concerns a person’s ability to pay attention to a task or notice changes in surroundings. A driver whose vigilance has been impaired by alcohol might forget to turn his or her headlights on when required. Similarly, impaired drivers often forget to signal a turn or lane change, or their signal is inconsistent with their [...]