This report reviews and evaluates the scientific literature on sobriety checkpoints in the United States. Concerns about the constitutionality of checkpoints procedures initially limited the number of checkpoint programs in this country as well as constraining the procedures used. However, nine case studies were located, along with a multi-state econometric study of various methodological problems no one study is convincing, the accumulation strongly supports the proposition that sobriety checkpoints can deter impaired driving. A review of selected foreign experience also supports this proposition. The totality of the evidence suggests that the following factors are important in maximizing the deterrent impact of checkpoints: (1) the clarity of purpose with which they are conducted; (2) the frequency of the checkpoints; (3) media attention; and (4) positioning in a diversified program of law enforcement related to impaired driving. (A)
Samenvatting