How much longer does it take a drunk or fatigued driver to respond?
There is simply not enough information available to give an assessment such as this. Further general rules-of-thumb have been proven to be wrong more than they are right. A better approach is to reconstruct the collision and the response time of an average driver under the circumstances and if the driver performed poorly, then you can state that the reason for the poor performance may have been due to the fatigue or alcohol consumption. However, if there is evidence that the driver responded in a timely manner, then you have no evidence that fatigue or alcohol influenced his or her response. Regarding the use of alcohol consider DATT. Dosage, Absorption, Tolerance & Task.
