DWI Detection and Standardized Field Sobriety Testing Session 5 – Phase One: Vehicle in Motion • Difficulty with motor vehicle controls

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

• Difficulty with motor vehicle controls

• Fumbling with driver license or registration

• Difficulty exiting the vehicle

• Repeating questions or comments

• Swaying, unsteady, or balance problems

• Leaning on the vehicle or other object

• Slurred speech

• Slow to respond to officer/officer must repeat

• Provides incorrect information, changes answers

• Odor of alcoholic beverage from the driver

Post Stop Clues

5-14

The research also identified 10 post stop cues. [P > .85].

• Difficulty with motor vehicle controls

• Fumbling with driver license or registration

• Difficulty exiting the vehicle

• Repeating questions or comments

• Swaying, unsteady, or balance problems

• Leaning on the vehicle or other object

• Slurred speech

• Slow to respond to officer/officer must repeat

• Provides incorrect information, changes answers

• Odor of alcoholic beverage from the driver

Explanation and illustration of the 24 detection cues.

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HS 178 R5/13 11 of 19

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

Visual Cues of Motorcycle

Impaired Drivers

5-15

C. Initial Observations: Visual Cues of Impaired Vehicle Operation (Motorcycles)

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

• Drifting during turn or curve

• Trouble with dismount

• Trouble with balance at a stop

• Turning problems

• Inattentive to surroundings

• Inappropriate or unusual behavior

• Weaving

Motorcycle DUI Detection Guide

Excellent Cues (50% or Greater Probability)

5-16

Research has identified driving impairment cues for motorcyclists.

(ANACAPA Sciences, DOT HS 807 839, 1993.)

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

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HS 178 R5/13 12 of 19Source: DWI Detection and

Standardized Field

Sobriety Testing