Guide for Detecting Drunk Drivers at Night

gotDUIHelp.com Staff — Thu, 04 Jun 2009 17:46:52 +0000

The below explains the visual cues contained in the DWI Detection Guide provide by the U.S. Department of Transportation. The number given after each visual cue is the probability that a driver exhibiting that cue has a BAC equal or greater than 0.10. For example the 65 for the first cue, Turning With Wide Radius, means that chances are 65 out of 100 that a driver who turns with a wide radius at night will have a BAC equal to or greater that 0.10. (print out the actual booklet - PDF Format)

Turning With Wide Radius

Straddling Center or Lane Marker

Appearing to be Drunk

Almost Striking Object or Vehicle

Weaving

Driving on Other Than Designated Roadway

Swerving

Speed Slower Than 10 M.P.H. Below Limit

Stopping Without Cause in Traffic Lane

Following Too Closely

Drifting

Tires on Center or Lane Marker

Braking Erratically

Driving Into Opposing Crossing Traffic

Signaling Inconsistently With Driving Actions

Slow Response to Traffic Signals

Stopping Inappropriately (Other Than in Traffic Lane)

Turning Abruptly or Illegally

Accelerating or Decelerating Rapidly

Headlights Off

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this page originally posted 12/20/98 updated to tour format, 1/28/99, then to Squarespace for the last update 6/4/2009 since 1997

DUI Driving Patterns

Guide for Detecting Drunk Drivers at Night