Whether the DUI roadblock, which stopped every approaching vehicle without individualized suspicion, was an unreasonable seizure under the Fourth Amendment and § 15 of the Kansas Bill of Rights.
Holding
No. On the particular facts of this checkpoint, the brief stop was constitutionally reasonable.
Reasoning
The court began with the premise that stopping an automobile and detaining its occupants, even briefly for a license check, is a Fourth Amendment seizure. Section 15 of the Kansas Bill of Rights has the same scope as the Fourth Amendment. Thus, the checkpoint could be sustained only if the public interest served by it outweighed the intrusion on individual liberty and privacy.
Delaware v. Prouse prohibited random, discretionary stops of individual vehicles to inspect licenses and registrations without reasonable suspicion. But Prouse also recognized that a roadblock stopping all oncoming traffic could be a constitutional alternative because it avoids leaving the choice of whom to stop to an officer in the field. The constitutional concern is arbitrary or unconstrained official discretion, not the mere absence of individualized suspicion in every checkpoint setting.
Applying Brown v. Texas, the court identified the relevant balance: the gravity of the public concern, the degree to which the seizure advances that concern, and the severity of the interference with individual liberty. Drunk driving presents an exceptionally serious danger to the public, and checkpoints can both remove impaired drivers from the road and deter potential drunk drivers from driving in the first place.
The court listed factors relevant to the reasonableness of a DUI checkpoint, including officers' discretion, the location and duration of the roadblock, supervisory standards, notice and warnings, safety measures, the anxiety created, detention time, available alternatives, and effectiveness. The factors are not a rigid checklist, but a means of assessing whether the checkpoint has adequate safeguards against arbitrary intrusion.
This checkpoint contained sufficient safeguards. Supervisory personnel selected the site and briefed the officers; every vehicle in both directions was stopped; officers had no discretion to select particular motorists; the officers were uniformed and clearly identifiable; the intersection was well lighted; marked police cars used flashing lights; and sufficient personnel were available to keep the detention brief. These facts distinguished the operation from the random, discretionary stops condemned in Prouse.
The court stressed that its ruling was limited to this roadblock's facts. It did not approve blanket or arbitrary checkpoint practices. A roadblock lacking adequate standards, guidelines, and protections against unfettered field-officer discretion would violate the Fourth Amendment and § 15. The court also suggested that statewide minimum standards adopted by the legislature or attorney general would be preferable to leaving checkpoint rules solely to local officials.