The Cook County Sheriffs like to sit on the entrance ramps on Roselle Rd and catch you flying past them. You won’t have a chance to slow down unless traffic does in front of you. Best bet is to drive around 60mph here unlike the 70mph average traffic likes to move. It’s a threat in both directions. They also like to sit on the exit ramps and catch people speeding on the frontage roads from that point westward.