re: When traveling on interstate & you come across police...

Got an answer for that. On I10 east of Lafayette, there is a city of Henderson cop (speed trap) who sometimes parks on top of the basin bridge, about 250 yards east of where the bridge actually begins. This area is not in the city limits of Henderson and the cop has zero jurisdiction to write tickets there, but does anyway.

Here's why: The city of Henderson gets to keep revenue from all tickets 10mph or higher. Anything less than 10mph goes to the state. Were he is parked, the speed limit is reduced from 70 to 60 (10mph). Now you know the rest of the story.