Two new studies indicate that driving with a hangover could be just as dangerous as driving drunk, Medical Daily reported. In one study, researchers from Utrecht University in the Netherlands and the University of the West of England in the U.K. put study participants through a series of drivi...

A court decision discrediting the reliability of machines used by hundreds of Ohio law-enforcement agencies to test drunken drivers could be the “death blow” for the controversial devices, defense attorneys say. But a spokeswoman for the Ohio Department of Health, the state agency that oversees ...

A 2009 report from the U.S. National Library of Medicine concluded that though “cognitive studies suggest that cannabis use may lead to unsafe driving, experimental studies have suggested that it can have the opposite effect.”And if all that isn't confounding enough, wrap your mind around one ...