M1 North Highway | Grayston | Sandton SITE NUMBER : BB55-37 DESCRIPTION : Located on M1 North highway on drivers left at Grayston Drive Off-ramp. This iconic site has outstanding visibility to traffic travelling in both directions of the M1 highway. SIZE: 7m (h) x 50m (w) = 350sqm TRAFFIC : Reach: 300,000 per day GPS CO-ORDINATES : -26.101818, 28.077639