No attempt is made to control traffic speed on 285. The last time I was on it the speed limit signs said 55 and traffic was running 75. This was 12 years ago. If you did not run 75 you were ran over. Some drivers were doing 80+. Lane changes pulling a 5th wheel were impossible. For this reason we always bypass Atlanta at any cost! Choose another route even if it means more miles. I'm not sure what the posted limit is now but you can be assured law enforcement has no presence in the area.