Most of HWY 78 is 45 mph except where NEW 35 mph signs have been posted. The new 35 mph speed limit begins from the McDonald’s located at Henry Clower Blvd and continues until you pass HWY 84 (Grayson Parkway). This has just recently been changed. These signs are many and so new that the "school Zone" speed limit sign that hangs OVER HWY 78, still says "35 mph when FLASHING." A family member was sited for speeding going 47 mph, I drove to through town 20 minutes later, and 4 of Snellville’s finest had pulled over a car a piece. Be careful out there ~