Joanne You are correct in you have a right to travel and DIO check points are required to follow that. Meaning if they impede your right to travel for more then 15 minutes without jist cause the check point must cease operation to clear travel. If you have ever gone through one the first officers you see are the proposed stop point, meaning if cars are at that point or beyond they must allow traffic go through without stopping. Before you get all up in there was an accident and we sat for hours that is different they are not the ones stopping your travel, those involved in the accident are.