When heading southwest toward 494 from Hwy 61 on Maxwell, there is a hill you go down, that curves to the LeFort On the Left hand side of the road there is a Excel energy maintenance center. They sit in the driveway and use laser on oncoming traffic through the gap in the trees. Often times you will not notice them until either 1, you pass the plant and see the officer, or 2, the red lights are in your rear view mirror.