Final answer:
Alcohol intoxication contributes significantly to the fraction of highway deaths, as it impairs essential driving skills. Current statistics would be required for a precise figure, but alcohol's involvement in fatal road accidents is notably high.
Step-by-step explanation:
The fraction of highway deaths involved with alcohol is significant, given that alcohol intoxication is a common factor in these fatalities. In the United States, alcohol-related incidents result in a substantial number of acute and indirect deaths each year, as it impairs judgment and motor skills essential for driving. Meanwhile, data from sources like the American Automobile Association indicate that driver error is a leading cause of fatal auto accidents, with a considerable percentage attributed to alcohol consumption.
To provide a relevant answer, more up-to-date statistics would be needed that delineate the specific fraction of highway deaths directly associated with alcohol. However, it is widely acknowledged that driving under the influence greatly increases the risk of fatal accidents.