Boksburg, R21 & N12 Interchange (B) SITE NUMBER : BB100-08 DESCRIPTION : At the R21 & N12 Interchange: Facing busy traffic travelling on the R24 towards O.R. Tambo International Airport. Drivers right, next to Volvo Industrial Equipment Supplier SIZE: 8m x 30m TRAFFIC : 1 80 000 Vehicles per month GPS CO-ORDINATES : -26.169944, 28.231556