R21, Johannesburg, Gauteng (1) SITE NUMBER : BB77-10 DESCRIPTION : Side A - It lies on Albertina Sisulu Drive (R21) facing traffic traveling from Pretoria to O.R Tambo International airport. SIZE: 4.5m x 18m TRAFFIC : 6 000,000 Vehicles per month GPS CO-ORDINATES : -26.109001, 28.239043