DWI Detection and Standardized Field Sobriety Testing Session 5 – Phase One: Vehicle in Motion What do you see? • Tries to flee? • No response? • Slow response? • Abrupt weave? • Sudden stop? • Strikes curb? • New violations? • Anything else?

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

What do you see?

• Tries to flee?

• No response?

• Slow response?

• Abrupt weave?

• Sudden stop?

• Strikes curb?

• New violations?

• Anything else?

Vehicle in Motion

Stopping Sequence

5-25

E. Typical Reinforcing Cues of the Stopping Sequence

After the command to stop is given, the alcohol impaired driver may exhibit additional

important evidence of DWI.

Some of these cues are exhibited because the stop command places additional

demands on the driver's ability to divide attention.

The signal to stop creates a new situation, to which the driver must devote some

attention, i.e., emergency flashing lights, siren, etc., demand and divert the subject's

attention.

Signal to stop requires the driver to turn the steering wheel, operate the brake pedal,

activate the signal light, etc.

As soon as officer gives the stop command, the subject's driving task becomes more

complex.

If subject is under the influence, the subject may not be able to handle this more

complex driving very well.

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HS 178 R5/13 18 of 19

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

Requires the ability to:

• Recognize evidence of alcohol and/or other

drug influence

• Describe that evidence clearly and

convincingly

Phase One: Task Two

Observation of the Stop

5-26

Phase One: Task Two Observation of the Stop

It is the officer's responsibility to capture and convey the additional evidence of

impairment that may be exhibited during the stopping sequence.

• Requires ability to recognize evidence of alcohol and/or other drug influence.

• Requires ability to describe that evidence clearly and convincingly.

• Recognition and Description of Initial and Reinforcing Cues

Procedures for practicing cue recognition and description.

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

The Sliding Sports Car

5-27

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

The Impatient Driver

5-28

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HS 178 R5/13 19 of 19

DWI Detection and Standardized Field Sobriety Testing

Session 5 – Phase One: Vehicle in Motion

Half in the Bag

5-29

Standard ized Field Sobriety Test Course

Session 5 – Phase One: Vehicle in Motion

QUESTIONS?

5-32

Test your Knowledge

INSTRUCTIONS: Complete the following sentences.

1. The Phase One tasks are

2. Two common symptoms of impairment are:

3. Alcohol impairs the ability to among tasks.

4. Three cues reinforcing the suspicion of DWI which may be observed during the

stopping sequence are:

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HS 178 R5/13 1 of 14Source: DWI Detection and

Standardized Field

Sobriety Testing