Massachusetts DWI DUI OUI Field Sobriety Test Police Training Manual

GLOSSARY OF TERMS

ALVEOLAR BREATH—Breath from the deepest part of the lung.

BLOOD ALCOHOL CONCENTRATION (BAC)—The percentage of alcohol in a person’s blood.

BREATH ALCOHOL CONCENTRATION (BrAC)—The percentage of alcohol in a person’s breath, taken from deep in the lungs.

CLUE—Something that leads to the solution of a problem.

CUE—A reminder or prompting as a signal to do something. A suggestion or a hint.

DIVIDED ATTENTION TEST—A test which requires the subject to

DWI/DUI—The acronym “DWI” means driving while impaired and is synonymous with the acronym “DUI”, driving under the influence or other acronyms used to denote impaired driving. These terms refer to any and all offenses involving the operation of vehicles by persons under the influence of alcohol and/or other drugs.

DWI DETECTION PROCESS—The entire process of identifying and gathering evidence to determine whether or not a suspect should be arrested for a DWI violation. The DWI detection process has three phases:

Phase One—Vehicle In Motion
Phase Two—Personal Contact
Phase Three—Pre-arrest Screening

EVIDENCE—Any means by which some alleged fact that has been submitted to investigation may either be established or disproved. Evidence of a DWI violation may be of various types:

a. Physical (or real), evidence: something tangible, visible, or audible.
b. Well established facts (judicial notice).
c. Demonstrative evidence: demonstrations performed in the courtroom.

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