Whether the initial stop of Cains’s vehicle at the roadblock was a reasonable Fourth Amendment seizure.
Holding
Yes. The checkpoint was constitutionally reasonable because it was conducted under neutral, objective criteria, served the substantial public interest in highway safety, and imposed only a minimal intrusion on motorists.
Reasoning
A traffic stop and detention of a vehicle’s occupants are Fourth Amendment seizures. Ordinarily, an investigatory seizure requires individualized reasonable suspicion. A checkpoint is different because it necessarily stops motorists without individualized suspicion; therefore, its validity depends on whether it operates under a plan that meaningfully limits the discretion of officers in the field.
The court applied the balancing principles derived from Martinez-Fuerte, Delaware v. Prouse, Texas v. Brown, and Brown v. Texas. The public interest in detecting and removing impaired drivers from the highways is exceptionally strong. Drunk driving creates an obvious and serious danger to motorists and the public at large.
The checkpoint sufficiently advanced that public interest. Troopers selected the area because they had experienced problems there, and the location—a well-traveled route north of the beach at the end of a spring weekend—reasonably suggested that impaired drivers might be present. The State did not need statistical proof of the number of DUI arrests produced by the checkpoint; removing even one impaired driver and deterring others could advance highway safety.
The intrusion on ordinary motorists was slight. Every vehicle in both lanes was stopped, each driver was asked for a license, and drivers without apparent problems were released within approximately five to ten seconds. Because the procedure applied uniformly to all vehicles, it avoided the standardless, selective discretion that made random roving-patrol stops unconstitutional in Prouse.
Although field officers selected the checkpoint’s site, time, and duration, they obtained their supervisor’s approval, and the supervisor later inspected the operation. More importantly, the officers’ discretion in carrying out the stop was constrained by the neutral rule that every approaching vehicle would be stopped briefly. The court concluded that this was not a pretextual or arbitrary roadblock.