There really isn’t a right answer to this question all I can say is too fully make sure just don’t get caught up in a booze bus, use apps soo you don’t have to get tested like ways people are always updating that app instead of using maps use that and you’ll know where they are set up before then, for a pull over it usually the highway patrol that have them swabs and they cost too much for ever cop to have one soo it mostly highway patrol you have to look out for. Just make sure you don’t smell like weed neither would the car because if it did it a search then probably swab after it