A total of 430 cars were processed through the checkpoint and twenty-nine drivers were investigated for suspicion of DUI. Of the drivers investigated for DUI, a total of three were arrested for DUI. This is about a .007 percentage rate of success. Other arrests were made for Transporting an Open Container of Alcohol, and Possession of a Controlled Substance.
Critics of DUI checkpoints in both Kansas and Missouri will be quick to point out that the low rate of DUI arrests indicate that checkpoints are not an effective method of DUI enforcement, and only serve to unnecessarily harass innocent drivers and intrude upon Fourth Amendment Constitutional Rights.
Proponents of DUI Checkpoints will use the very same statistics as proof that the checkpoints are effective at raising public awareness through heightened visibility, thus 'educating' the public not to drink and drive. Because so few people were arrested, the DUI Checkpoints must be working.