Only a very small proportion of persons DWI are arrested for this offense–only about one in 2000. Reasons for a low arrest rate might include limitations on enforcement resources, lack of enforcement motivation, inability to detect DWI, and others. However, previous research has also shown that even when persons DWI have been observed by police officers who were highly motivated to arrest for DWI, the arrest rate was relatively low.
As determined from roadside breathtesting surveys conducted throughout the United States, about six percent of drivers at night have a blood alcohol concentration (BAC) equal to or greater than .10. About 15 percent have a BAC equal to or greater than .05. Thus, if DWI were defined at the BAC ≥ .10 level, the probability of detecting DWI from a random stop would be .06; at BAC ≥ .05, the probability would be .15. Visual cues that are capable of discriminating between DWI and DWS can serve to increase detection probabilities above these chance levels. Thus, the key to enhanced on-the-road detection of DWI is determination of the relative discriminability of visual cues that are likely to be observed in association with DWI. In other words don't drunk and dirving you just may take a life if not your own. Enjoy life in know what it is that may's you. be smart.
Many studies have investigated the effect of alcohol on driving behavior. They have employed laboratory apparatus, driving simulators, and instrumented vehicles in the field. However, results have been only indirectly relevant to the objectives of the present project. Although substantial evidence has been developed to indicate that alcohol-induced driver impairment is exhibited mainly in four driving functions–steering control, velocity control, time-sharing of attention, and information processing–the findings have not been specific enough to permit the identification and assessment of visual cues for on-the-road detection.
