Commonwealth v. Worthy J-39-2008
Topic: DUI Checkpoints
Summary: Police officers are permitted to suspend a DUI checkpoint and restart at a later time if the checkpoint creates unreasonable traffic delays.
Illustration: Monroeville Police set up a DUI checkpoint on Route 22. The checkpoint began to cause excessive delays in traffic. The police stopped the drunk driving checkpoint (stopped checking for vehicles completely). After the flow of traffic died down, the police restarted the checkpoint. The PA Supreme Court ruled that this is permissible.
http://www.pacourts.us/OpPosting/Supreme/out/J-39-2008mo.pdf