The U.S. Supreme Court upheld the constitutionality of DUI roadblocks in Michigan v. Sitz in 1990. It determined that DUI checkpoints were not illegal searches and seizures. The Court deemed that the intrusion was justified due to the public interest in reducing the incidents of driving under the influence. These checkpoints were specifically permitted to detect DUI cases.nnIn additional to DUI charges, officers at DUI checkpoints issue criminal complaints and citations for other issues, such as drug possession, out-of-date registrations, expired driver’s licenses, tinted windows, and defective tail lights. Many lawyers and legal experts continue to believe that the Supreme Court’s decision on this matter was incorrect, since the fourth amendment protects against unreasonable searches and seizures – without making an exception for roadblocks.