We all know that DUI checkpoints are upheld by the SCOTUS in the famous case of Michgan Vs. Sitiz. I can't seem to find any rulings on anything pretaining to Smog checkpoints? If that is the case, wouldn't CA in violation of the 4th amendment ? Upon the fact that they do not have any probable cause to do so?
I'm simply looking for information here, in a civil manner.
Thanks
I'm simply looking for information here, in a civil manner.
Thanks

. I'm sick of these smog nazis in the state we all live in. 
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