Usually during the day, but it can be any time. A officer Russell that is Black will go after White drivers and Not only watch the speed, he will say that they drive reckless and the judge in the court in Pontiac Michigan will go along with this. I wrote to the Chief of Police, the Mayor and city council members and this man is still out there doing this to White drivers. He even told me 4 different times he would put my white ass in Jail after I asked why I was being stoped. He also lied in court and got away with it. Be careful of this man and he will come toward you with his had on his Gun. The city officals does not care, they all are black and stick together