In what year were sobriety checkpoints introduced?

Sobriety checkpoints were introduced in the United States in 1990, following the Supreme Court decision in Michigan Department of State Police v. Sitz. This ruling upheld the constitutionality of sobriety checkpoints, allowing law enforcement to conduct these stops as a method to deter impaired driving and increase public safety. The idea behind this initiative is to reduce the number of accidents and fatalities related to drunk driving by effectively increasing the perceived risk of being caught driving under the influence. Since their introduction, sobriety checkpoints have been utilized in various forms across many states, contributing to efforts to maintain safer roadways.