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Reference.org
Designated driver
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<p>The terms "designated driver" and "designated driving" (commonly known as DD) refer to the selection of a person who remains <a href="/facts/Sobriety/TfdXbD2W">sober</a> as the responsible driver of a vehicle whilst others have been allowed to drink <a href="/facts/Alcoholic_drink/HSHVWBtX">alcoholic beverages</a>. </p><p>Thus, as a practical and ethical matter a <i>designated driver</i> is a person who abstains from <a href="/facts/Alcohol_(drug)/IeK2fVd5">alcohol</a> on an occasion in order to drive their companions home safely as an alternative to <a href="/facts/Driving_under_the_influence/n244VGfP">driving under the influence</a>. In order to encourage these arrangements, some bar, restaurant and nightclub proprietors will offer free or reduced-price soft drinks to designated drivers. </p>