Johannesburg, Grayston Dr. SITE NUMBER : BB64-07 DESCRIPTION : Digital - Corner Grayston Drive & M1 South off ramp (Spots per Day: 480 Spots per Month: 14,400 Spots Duration: 10,15,20 Seconds) Screened 240 times each day SIZE: 3m x 6m TRAFFIC : 3,384,900 Vehicles per month