For people who don't know, these checkpoints (commonly called Sobriety Checkpoints) are set up to catch drunk drivers. A common use of these would be in situations like sporting events or similar instances where large amounts of people gather and have an increased chance of driving home while inebriated.
On one hand, these checkpoints significantly reduce the potential for large amounts of drunk drivers to be allowed into traffic. Also, it has the potential to reduce accidents during holidays commonly associated with drinking alcohol. In summary, their intent is to ensure the public's safety on the road.
On the other hand, the Fourth Amendment states that no person shall be subject to unreasonable searches or seizures. Given that every car is stopped in a sobriety checkpoint, people are stopped without probable cause, which can be interpreted as a direct violation of the Fourth Amendment, regardless of any value to public safety.
Ultimately, the question is: are sobriety checkpoints too much of a violation of the Fourth Amendment or should they be used for the sake of public safety?