I-55 mile 100 to 126 (Springfield to I-55 I-155 split) there is a Weigh station and a rest stop. I travel this route about once a week and there is almost always a LEO set up around the weigh station. On a few occasions they run more than one.
***There is a faded green Camero that is a ISHP car. It has no antennas or spotlight. They only thing to give it away is a laptop mounted in the passenger seat or the lights when it has someone pulled over. When he sits in the median it looks like some donk trying to illegally turn around.