Motorcycle DWI Detection Guide

NHTSA has found that the following cues predicted impaired motorcycle operation.

Excellent Cues (50% or greater probability)

• Drifting during turn or curve
• Trouble with dismount
• Trouble with balance at a stop
• Turning problems (e.g., unsteady, sudden corrections, late braking, improper lean angle)
• Inattentive to surroundings
• Inappropriate or unusual behavior (e.g., carrying or dropping object, urinating at roadside, disorderly conduct, etc.)
• Weaving

Good Cues (30 to 50% probability)

• Erratic movements while going straight
• Operating without lights at night
• Recklessness
• Following too closely
• Running stop light or sign
• Evasion
• Wrong way