Massachusetts DWI DUI OUI Field Sobriety Test Police Training Manual

A pocket-sized booklet listing these cues is available free of charge from:
National Highway Traffic Safety Administration
Impaired Driving Division
400 Seventh Street, SW., Room 5118
Washington, DC 20590

VISUAL CUE DESCRIPTIONS
Turning With Wide Radius—During a turn, the
radius defined by the distance between the turning 
vehicle and the center of the turn in greater than
normal.

Straddling Center or Lane Marker—The vehicle
is moving straight ahead with the center or lane marker between the left-hand and right-hand wheels.

Appearing to be Impaired—This cue is actually one or more of a set of indicators related to the personal behavior or appearance of the driver. Examples of specific indicators might include;

• Eye fixation
• Tightly gripping the steering wheel
• Slouching in the seat
• Gesturing erratically or obscenely
• Face close to the windshield
• Drinking in the vehicle
• Driver’s head protruding from vehicle

Almost Striking Object or Vehicle—The observed vehicle almost strikes a stationary object or another moving vehicle. Examples include: passing abnormally close to a sign, wall, building, or other object; passing abnormally close to another moving vehicle; and causing another vehicle to maneuver to avoid collision.

Weaving—Weaving occurs when the vehicle alternately
moves toward one side of the roadway and then the
other, creating a zig-zag course. The pattern of lateral
movement is relatively regular as one steering correction
is closely followed by another.

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