In most states it's illegal to DRIVE with your PARK lights on even if you have fogs on with them. And here and Nebraska if you were driving with fogs and park lights on it's a double violation, and at night a triple violation. One, you can never drive with park lights on......ever. Two, any auxillary lighting must be turned off (fogs, driving lights, or off-road lights) when meeting or overtaking traffic (in the city, bascially all the time). And if it's dark out you don't have your headlights on and that is also a violation.