The phrase "the road to hell" is a metaphorical expression that means taking a path or making choices that lead to negative consequences, trouble, or disaster. It suggests that someone's actions are leading them down a destructive and dangerous path, which can ultimately result in their own ruin. The phrase originates from the belief that the road to the town of Hell, Michigan was particularly treacherous and difficult to navigate, making it a fitting metaphor for any perilous journey or decision.