|Summary

To summarize, the DWI cues related to problems in maintaining proper
lane position include,

Weaving,Weaving across lane lines,Straddling a lane line,Drifting,Swerving,Almost striking a vehicle or other object, andTurning with a wide radius, or drifting during a curve.The DWI cues related to speed and braking problems include,

Stopping problems (too far, too short, too jerky),Accelerating for no reason,Varying speed, andSlow speed.The DWI cues related to vigilance problems include,

Driving without headlights at night,Failure to signal a turn or lane change, or Signaling inconsistently
  with actions,Driving in opposing lanes or the wrong way on a one-way street,Slow response to traffic signals,Slow or failure to repsond to officer's signals, andStopping in the lane for no apparent reason.The DWI cues related to judgment problems include

Following too closely,Improper or unsafe lane change,Illegal or improper turn (too fast, jerky, sharp, etc.),Driving on other than the designated roadway,Stopping inappropriately in response to an officer,Inappropriate or unusual behavior, andAppearing to be impaired.
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|Post-Stop Cues

In addition to the driving cues, the following post-stop cues have been
found to be excellent predictors of DWI.

Difficulty with motor vehicle controls,Difficulty exiting the vehicle,Fumbling with driver's license or registration,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 questions,Provides incorrect information or changes answers, andOdor of alcoholic beverage from the driver.Top of Page

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