When exiting I-75 at Exit 288 and heading into Cartersville on what becomes Main Street, the speed limit is posted at 45. There is a hill you go up after you exit, and on the downside of the hill, the police will run radar at the new Chili’s and IHOP and catch people who have sped up to pass slow trucks on the hill. The good news is that they usually put out an electronic speed tracker for a few days before they step up patrolling the area. Just restrain yourself as you crest the hill, and you should be okay.