Interstate I-55 Ponchatoula near US Highway US 51
There is 2 white lines approx 1 mile from the end of 1-55 where they clock you via airplane. If you see a plane circling above slow down. They will have 4-6 troopers waiting at the end of the elevated hwy near Ponchatoula end.
Also, they shoot radar coming off of the elevated section.