Sandton, M1 North Grayston Dr (2) SITE NUMBER : BB18-107 DESCRIPTION : This site is located on the M1 Highway right after the Grayston Drive on Ramp. This stretch of highway reaches high demographic traffic travelling from Sandton CBD. SIZE: 4.5m x 18m TRAFFIC : 1.5 Mil per month GPS CO-ORDINATES : -26.101691545, 28.0794244268