Are police permitted to conduct driver's license checkpoints without reasonable suspicion?

Questions Presented : Question #1: Are police, absent reasonable suspicion, permitted to conduct driver’s license checkpoints, or roadway safety checkpoints requiring drivers to produce their driver’s ; : licenses to police? Question #2: Are individuals required to produce their driver’s licenses to the police, _ absent reasonable suspicion, during roadway safety checkpoints? , Question #3: Does a driver’s refusal to provide a driver’s license, refusal to roll down the ; windows, raised middle finger, “fuck you” statement, and refusal to answer questions during a license or roadway safety checkpoint conducted by police constitute obstruction of justice? , _ IL Parties All parties are named in the caption. : , : III. _